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"/decoders/js8_decoder/decoders/js8_test.wav", "exists": false, "error": "[Errno 2] No such file or directory: '/decoders/js8_decoder/decoders/js8_test.wav'" } ], "selected_wav_hint": { "path": "/decoders/js8_test.wav", "exists": true, "is_file": true, "is_dir": false, "size": 4608442, "mtime_utc": "2026-05-26T06:05:27Z" }, "rx_only_guard": { "tx": false, "ptt": false, "tune": false, "send": false, "js8call_runtime_control": false, "webftr_productive_integration": false }, "latest_manifest": { "name": "20260527T120240Z_source-bitpath-audit_manifest.json", "url": "/logs/20260527T120240Z_source-bitpath-audit_manifest.json", "stat": { "exists": true, "is_file": true, "is_dir": false, "size": 899, "mtime_utc": "2026-05-27T12:02:45Z" }, "json": { "schema": "webftr-js8-decoder-lab-log-manifest-v2", "project": "WebFTR JS8 Decoder Lab", "version": "step53-focused-source-bitpath-audit-timeout-fix", "status": "ok", "exit_code": 0, "command": "source-bitpath-audit", "timestamp_utc": "2026-05-27T12:02:45Z", "root": "/decoders/js8_decoder", "log_file": "/decoders/js8_decoder/logs/20260527T120240Z_source-bitpath-audit.log", "python": "3.11.2", "platform": "Linux-6.12.75+rpt-rpi-v8-aarch64-with-glibc2.36", "rx_only_guard": { "tx": false, "ptt": false, "tune": false, "send": false, "note": "This lab wrapper performs RX-only WAV/source inspection and never starts JS8Call runtime TX actions." }, "outputs": { "source_bitpath_audit_json": "/decoders/js8_decoder/logs/20260527T120240Z_source_bitpath_audit_output.json" }, "source_dir": "/decoders/js8_decoder/runtime/src/JS8Call-improved" } }, "latest_log": { "url": "/logs/latest.log", "stat": { "exists": true, "is_file": true, "is_dir": false, "size": 402043, "mtime_utc": "2026-05-27T12:02:46Z" }, "tail": " \"\"\n },\n {\n \"line\": 100,\n \"text\": \" public slots:\"\n },\n {\n \"line\": 101,\n \"text\": \"\"\n }\n ]\n },\n {\n \"line\": 104,\n \"match\": \"void decode();\",\n \"context\": [\n {\n \"line\": 101,\n \"text\": \"\"\n },\n {\n \"line\": 102,\n \"text\": \" void start(QThread::Priority priority);\"\n },\n {\n \"line\": 103,\n \"text\": \" void quit();\"\n },\n {\n \"line\": 104,\n \"text\": \" void decode();\"\n },\n {\n \"line\": 105,\n \"text\": \"};\"\n },\n {\n \"line\": 106,\n \"text\": \"} // namespace JS8\"\n },\n {\n \"line\": 107,\n \"text\": \"\"\n }\n ]\n }\n ]\n },\n {\n \"path\": \"JS8_Mode/Decoder.h\",\n \"exists\": true,\n \"bytes\": 2022,\n \"lines\": 90,\n \"score\": 14,\n \"keyword_hits\": {\n \"decode\": 7,\n \"Decode\": 7\n },\n \"phase_scores\": {\n \"symbol_to_bits\": 0,\n \"bit_order_interleaver\": 0,\n \"whitening_mask\": 0,\n \"ldpc_fec\": 0,\n \"message91_crc\": 0,\n \"timing_constants\": 0\n },\n \"candidate_functions\": [],\n \"candidate_arrays\": [],\n \"candidate_defines\": [],\n \"snippets\": [\n {\n \"line\": 1,\n \"match\": \"#ifndef DECODER_H\",\n \"context\": [\n {\n \"line\": 1,\n \"text\": \"#ifndef DECODER_H\"\n },\n {\n \"line\": 2,\n \"text\": \"#define DECODER_H\"\n },\n {\n \"line\": 3,\n \"text\": \"\"\n },\n {\n \"line\": 4,\n \"text\": \"/**\"\n }\n ]\n },\n {\n \"line\": 2,\n \"match\": \"#define DECODER_H\",\n \"context\": [\n {\n \"line\": 1,\n \"text\": \"#ifndef DECODER_H\"\n },\n {\n \"line\": 2,\n \"text\": \"#define DECODER_H\"\n },\n {\n \"line\": 3,\n \"text\": \"\"\n },\n {\n \"line\": 4,\n \"text\": \"/**\"\n },\n {\n \"line\": 5,\n \"text\": \" * (C) 2019 Jordan Sherer - All Rights Reserved\"\n }\n ]\n },\n {\n \"line\": 37,\n \"match\": \"class Decoder : public QObject {\",\n \"context\": [\n {\n \"line\": 34,\n \"text\": \" QScopedPointer m_proc;\"\n },\n {\n \"line\": 35,\n \"text\": \"};\"\n },\n {\n \"line\": 36,\n \"text\": \"\"\n },\n {\n \"line\": 37,\n \"text\": \"class Decoder : public QObject {\"\n },\n {\n \"line\": 38,\n \"text\": \" Q_OBJECT\"\n },\n {\n \"line\": 39,\n \"text\": \" public:\"\n },\n {\n \"line\": 40,\n \"text\": \" Decoder(QObject *parent = nullptr);\"\n }\n ]\n },\n {\n \"line\": 40,\n \"match\": \"Decoder(QObject *parent = nullptr);\",\n \"context\": [\n {\n \"line\": 37,\n \"text\": \"class Decoder : public QObject {\"\n },\n {\n \"line\": 38,\n \"text\": \" Q_OBJECT\"\n },\n {\n \"line\": 39,\n \"text\": \" public:\"\n },\n {\n \"line\": 40,\n \"text\": \" Decoder(QObject *parent = nullptr);\"\n },\n {\n \"line\": 41,\n \"text\": \" ~Decoder();\"\n },\n {\n \"line\": 42,\n \"text\": \"\"\n },\n {\n \"line\": 43,\n \"text\": \" void lock();\"\n }\n ]\n },\n {\n \"line\": 41,\n \"match\": \"~Decoder();\",\n \"context\": [\n {\n \"line\": 38,\n \"text\": \" Q_OBJECT\"\n },\n {\n \"line\": 39,\n \"text\": \" public:\"\n },\n {\n \"line\": 40,\n \"text\": \" Decoder(QObject *parent = nullptr);\"\n },\n {\n \"line\": 41,\n \"text\": \" ~Decoder();\"\n },\n {\n \"line\": 42,\n \"text\": \"\"\n },\n {\n \"line\": 43,\n \"text\": \" void lock();\"\n },\n {\n \"line\": 44,\n \"text\": \" void unlock();\"\n }\n ]\n },\n {\n \"line\": 88,\n \"match\": 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\"JS8_Main/Varicode.cpp\",\n \"phase_score\": 231,\n \"score\": 1011\n },\n {\n \"path\": \"JS8_Mode/JS8.cpp\",\n \"phase_score\": 224,\n \"score\": 387\n },\n {\n \"path\": \"JS8_Mode/whitening_processor.h\",\n \"phase_score\": 73,\n \"score\": 153\n },\n {\n \"path\": \"JS8_Mode/soft_combiner.h\",\n \"phase_score\": 61,\n \"score\": 125\n },\n {\n \"path\": \"JS8_Mode/JS8Submode.cpp\",\n \"phase_score\": 41,\n \"score\": 157\n },\n {\n \"path\": \"JS8_Main/Varicode.h\",\n \"phase_score\": 32,\n \"score\": 154\n },\n {\n \"path\": \"JS8_Mode/ldpc_feedback.h\",\n \"phase_score\": 31,\n \"score\": 109\n },\n {\n \"path\": \"JS8_Mode/DecodedText.cpp\",\n \"phase_score\": 23,\n \"score\": 176\n }\n ],\n \"bit_order_interleaver\": [\n {\n \"path\": \"JS8_JSC/JSC_list.cpp\",\n \"phase_score\": 10,\n \"score\": 1105\n },\n {\n \"path\": \"JS8_JSC/JSC_map.cpp\",\n \"phase_score\": 10,\n \"score\": 1104\n },\n {\n \"path\": \"JS8_Mode/JS8.cpp\",\n \"phase_score\": 6,\n \"score\": 387\n },\n {\n \"path\": \"JS8_Mode/soft_combiner.h\",\n \"phase_score\": 2,\n \"score\": 125\n }\n ],\n \"whitening_mask\": [\n {\n \"path\": \"JS8_JSC/JSC_list.cpp\",\n \"phase_score\": 76,\n \"score\": 1105\n },\n {\n \"path\": \"JS8_JSC/JSC_map.cpp\",\n \"phase_score\": 76,\n \"score\": 1104\n },\n {\n \"path\": \"JS8_Mode/whitening_processor.h\",\n \"phase_score\": 24,\n \"score\": 153\n },\n {\n \"path\": \"JS8_Mode/JS8.cpp\",\n \"phase_score\": 21,\n \"score\": 387\n },\n {\n \"path\": \"JS8_Main/Varicode.cpp\",\n \"phase_score\": 11,\n \"score\": 1011\n }\n ],\n \"ldpc_fec\": [\n {\n \"path\": \"JS8_Mode/JS8.cpp\",\n \"phase_score\": 30,\n \"score\": 387\n },\n {\n \"path\": \"JS8_Mode/ldpc_feedback.h\",\n \"phase_score\": 13,\n \"score\": 109\n },\n {\n \"path\": \"JS8_JSC/JSC_list.cpp\",\n \"phase_score\": 5,\n \"score\": 1105\n },\n {\n \"path\": \"JS8_JSC/JSC_map.cpp\",\n \"phase_score\": 5,\n \"score\": 1104\n }\n ],\n \"message91_crc\": [\n {\n \"path\": \"JS8_Main/Varicode.cpp\",\n \"phase_score\": 641,\n \"score\": 1011\n },\n {\n \"path\": \"JS8_JSC/JSC_list.cpp\",\n \"phase_score\": 121,\n \"score\": 1105\n },\n {\n \"path\": \"JS8_JSC/JSC_map.cpp\",\n \"phase_score\": 120,\n \"score\": 1104\n },\n {\n \"path\": \"JS8_Mode/DecodedText.cpp\",\n \"phase_score\": 76,\n \"score\": 176\n },\n {\n \"path\": \"JS8_Main/Varicode.h\",\n \"phase_score\": 66,\n \"score\": 154\n },\n {\n \"path\": \"JS8_Mode/JS8.cpp\",\n \"phase_score\": 24,\n \"score\": 387\n },\n {\n \"path\": \"JS8_Mode/DecodedText.h\",\n \"phase_score\": 24,\n \"score\": 86\n },\n {\n \"path\": \"JS8_Mode/JS8Submode.cpp\",\n \"phase_score\": 7,\n \"score\": 157\n }\n ],\n \"timing_constants\": [\n {\n \"path\": \"JS8_Mode/JS8Submode.cpp\",\n \"phase_score\": 26,\n \"score\": 157\n },\n {\n \"path\": \"JS8_Mode/JS8.cpp\",\n \"phase_score\": 5,\n \"score\": 387\n },\n {\n \"path\": \"JS8_Include/commons.h\",\n \"phase_score\": 3,\n \"score\": 66\n },\n {\n \"path\": \"JS8_Mode/JS8Submode.h\",\n \"phase_score\": 3,\n \"score\": 40\n }\n ]\n },\n \"lab_alignment_questions\": [\n {\n \"lab_observation\": \"Step51 source-aligned NSPS=6192 still reaches best syndrome 22 and prefers tone-spacing offset -0.03.\",\n \"source_question\": \"Find whether JS8Call-Improved applies submode-specific symbol timing/tone correction after JS8_NSPS or before FEC extraction.\",\n \"look_in\": [\n \"JS8_Mode/JS8Submode.cpp\",\n \"JS8_Mode/JS8.cpp\",\n \"JS8_Mode/Decoder.cpp\"\n ]\n },\n {\n \"lab_observation\": \"Best row currently depends on lab FT8-style Gray demap and bit-order hypotheses.\",\n \"source_question\": \"Find exact symbol-to-bit and interleaver/deinterleaver path before LDPC to replace the lab hypothesis.\",\n \"look_in\": [\n \"JS8_Mode/Decoder.cpp\",\n \"JS8_Mode/ldpc_feedback.h\",\n \"JS8_Mode/soft_combiner.h\"\n ]\n },\n {\n \"lab_observation\": \"Syndrome-closure/CRC probes do not validate Message91 candidates.\",\n \"source_question\": \"Find whitening/scrambling/mask and Varicode/JSC unpack order before adding more repair probes.\",\n \"look_in\": [\n \"JS8_Mode/whitening_processor.h\",\n \"JS8_Main/Varicode.cpp\",\n \"JS8_JSC/JSC_map.cpp\"\n ]\n }\n ],\n \"audit_conclusion\": {\n \"no_gui_runtime_started\": true,\n \"recommended_next_step\": \"Use top focused snippets to implement a source-derived bitpath/interleaver/whitening patch before another LDPC/CRC repair run.\",\n \"why\": \"Step51 confirmed source NSPS but did not improve below syndrome 22; remaining uncertainty is exact source bitpath rather than wider timing.\"\n }\n}\n\n[webftr-js8-lab] OK\n[webftr-js8-lab] log file: /decoders/js8_decoder/logs/20260527T120240Z_source-bitpath-audit.log\n[webftr-js8-lab] manifest: /decoders/js8_decoder/logs/20260527T120240Z_source-bitpath-audit_manifest.json\n" }, "output_refs": { "input_check": { "name": "20260527T110128Z_input_check_output.json", "path": "/decoders/js8_decoder/logs/20260527T110128Z_input_check_output.json", "url": "/logs/20260527T110128Z_input_check_output.json", "stat": { "exists": true, "is_file": true, "is_dir": false, "size": 684, "mtime_utc": "2026-05-27T11:01:29Z" }, "json_preview": { "ok": true, "mode": "JS8", "tool": "webftr-js8-input-check", "tool_version": "step51-source-aligned-tone-offset-cli-fix", "input_wav": "/decoders/js8_test.wav", "rx_only": true, "safety": { "tx": false, "ptt": false, "tune": false, "send": false, "js8call_runtime_control": false }, "decodes": [], "warnings": [], "wav": { "path": "/decoders/js8_test.wav", "channels": 1, "sample_rate": 12000, "sample_width_bytes": 2, "frames": 2304199, "duration_seconds": 192.016583, "rms_dbfs": -9.14, "peak_dbfs": -0.72, "clipped": false }, "next_action": "Run profile-scan, then auto-ldpc-probe on this WAV." } }, "sync_probe": { "name": "20260527T100315Z_selftest_sync_probe_output.json", "path": "/decoders/js8_decoder/logs/20260527T100315Z_selftest_sync_probe_output.json", "url": "/logs/20260527T100315Z_selftest_sync_probe_output.json", "stat": { "exists": true, "is_file": true, "is_dir": false, "size": 9747, "mtime_utc": "2026-05-27T10:03:24Z" }, "json_preview": { "ok": true, "mode": "JS8", "tool": "webftr-js8-sync-probe", "tool_version": "step49-source-constants-rx-core-extract-audit", "input_wav": "/decoders/js8_decoder/runtime/selftest_js8_costas_probe.wav", "rx_only": true, "safety": { "tx": false, "ptt": false, "tune": false, "send": false, "js8call_runtime_control": false }, "implementation_stage": "step43_sync_candidates_with_ldpc_probe_followup_no_final_decode", "wav": { "path": "/decoders/js8_decoder/runtime/selftest_js8_costas_probe.wav", "channels": 1, "sample_rate": 12000, "sample_width_bytes": 2, "frames": 148608, "duration_seconds": 12.384, "rms_dbfs": -15.61, "peak_dbfs": -12.25, "clipped": false }, "js8_reference": { "source": "JS8Call-Improved source-map orientation plus FT8-like Costas7 hypothesis", "sample_rate_hz": 12000, "default_nsps": 6192, "default_symbol_duration_seconds": 0.516, "costas7_candidate": [ 3, 1, 4, 0, 6, 5, 2 ], "tone_count_candidate": 8, "note": "This is a sync/symbol candidate extractor only. It estimates frame/symbol candidates for lab work and does not perform LDPC/FEC decode or JS8 message unpacking." }, "scan": { "nsps": 6192, "tone_spacing_hz": 1.937984, "freq_min_hz": 300.0, "freq_max_hz": 3000.0, "max_seconds_analyzed": 4.0, "start_candidates_scanned": 1, "base_candidates_scanned": 1, "base_candidates_hz": [ 1000.0 ], "coarse_tone_candidates": [ { "freq_hz": 1000.0, "relative_db": 0.0, "power": 6.94910418 }, { "freq_hz": 1025.0, "relative_db": -27.24, "power": 0.0131166 }, { "freq_hz": 975.0, "relative_db": -27.53, "power": 0.01227993 }, { "freq_hz": 1050.0, "relative_db": -37.39, "power": 0.0012678 }, { "freq_hz": 1075.0, "relative_db": -41.43, "power": 0.00049951 }, { "freq_hz": 950.0, "relative_db": -43.35, "power": 0.00032115 }, { "freq_hz": 1100.0, "relative_db": -46.57, "power": 0.00015313 }, { "freq_hz": 1250.0, "relative_db": -47.96, "power": 0.00011108 }, { "freq_hz": 1125.0, "relative_db": -48.58, "power": 9.635e-05 }, { "freq_hz": 1200.0, "relative_db": -50.32, "power": 6.457e-05 }, { "freq_hz": 875.0, "relative_db": -50.9, "power": 5.646e-05 }, { "freq_hz": 1175.0, "relative_db": -51.46, "power": 4.965e-05 } ] }, "sync_candidates": [ { "ok": true, "start_sample": 0, "start_seconds": 0.0, "base_freq_hz": 1000.0, "tone_spacing_hz": 1.937984, "nsps": 6192, "costas_pattern": [ 3, 1, 4, 0, 6, 5, 2 ], "costas_hits": 7, "costas_symbols": 7, "avg_margin_db": 29.11, "energy_score_db": 29.11, "candidate_score": 128.22, "symbols": [ { "symbol": 0, "expected_tone": 3, "strongest_tone": 3, "expected_is_strongest": true, "expected_power": 83.0873099286, "median_other_power": 0.1042308968, "margin_db": 29.02, "tone_powers": [ 0.0981480318, 0.1051242996, 0.1064179268, 83.0873099286, 0.1057422016, 0.1042308968, 0.0993799575, 0.0932492823 ] }, { "symbol": 1, "expected_tone": 1, "strongest_tone": 1, "expected_is_strongest": true, "expected_power": 83.0774568889, "median_other_power": 0.1014706768, "margin_db": 29.13, "tone_powers": [ 0.1068702304, 83.0774568889, 0.1052822376, 0.105564598, 0.1014706768, 0.0956100015, 0.0879534486, 0.0800992227 ] }, { "symbol": 2, "expected_tone": 4, "strongest_tone": 4, "expected_is_strongest": true, "expected_power": 83.0917714671, "median_other_power": 0.1044873575, "margin_db": 29.0, "tone_powers": [ 0.0960127168, 0.0986802754, 0.1054058068, 0.1081981246, 83.0917714671, 0.1055965002, 0.1044873575, 0.0990928872 ] }, { "symbol": 3, "expected_tone": 0, "strongest_tone": 0, "expected_is_strongest": true, "expected_power": 83.0749822549, "median_other_power": 0.0948551103, "margin_db": 29.42, "tone_powers": [ 83.0749822549, 0.1081775542, 0.1032741915, 0.1002757935, 0.0948551103, 0.0864721839, 0.080493759, 0.0726495994 ] }, { "symbol": 4, "expected_tone": 6, "strongest_tone": 6, "expected_is_strongest": true, "expected_power": 83.0368796528, "median_other_power": 0.1013897721, "margin_db": 29.13, "tone_powers": [ 0.0811328494, 0.088780076, 0.0950670222, 0.1013897721, 0.1027811248, 0.1070386893, 83.0368796528, 0.1089829146 ] }, { "symbol": 5, "expected_tone": 5, "strongest_tone": 5, "expected_is_strongest": true, "expected_power": 83.0780861176, "median_other_power": 0.1045690469, "margin_db": 29.0, "tone_powers": [ 0.0865241623, 0.0949217802, 0.099666939, 0.1045690469, 0.1061057949, 83.0780861176, 0.1100149946, 0.1049352501 ] }, { "symbol": 6, "expected_tone": 2, "strongest_tone": 2, "expected_is_strongest": true, "expected_power": 83.0649691812, "median_other_power": 0.1027968836, "margin_db": 29.07, "tone_powers": [ 0.1060939743, 0.1064017103, 83.0649691812, 0.1058247328, 0.1027968836, 0.1002472492, 0.0945580448, 0.088818472 ] } ], "symbol_preview": [ { "symbol": 0, "tone_index": 3, "confidence_db": 28.93, "powers": [ 0.0981480318, 0.1051242996, 0.1064179268, 83.0873099286, 0.1057422016, 0.1042308968, 0.0993799575, 0.0932492823 ] }, { "symbol": 1, "tone_index": 1, "confidence_db": 28.91, "powers": [ 0.1068702304, 83.0774568889, 0.1052822376, 0.105564598, 0.1014706768, 0.0956100015, 0.0879534486, 0.0800992227 ] }, { "symbol": 2, "tone_index": 4, "confidence_db": 28.85, "powers": [ 0.0960127168, 0.0986802754, 0.1054058068, 0.1081981246, 83.0917714671, 0.1055965002, 0.1044873575, 0.0990928872 ] }, { "symbol": 3, "tone_index": 0, "confidence_db": 28.85, "powers": [ 83.0749822549, 0.1081775542, 0.1032741915, 0.1002757935, 0.0948551103, 0.0864721839, 0.080493759, 0.0726495994 ] }, { "symbol": 4, "tone_index": 6, "confidence_db": 28.82, "powers": [ 0.0811328494, 0.088780076, 0.0950670222, 0.1013897721, 0.1027811248, 0.1070386893, 83.0368796528, 0.1089829146 ] }, { "symbol": 5, "tone_index": 5, "confidence_db": 28.78, "powers": [ 0.0865241623, 0.0949217802, 0.099666939, 0.1045690469, 0.1061057949, 83.0780861176, 0.1100149946, 0.1049352501 ] }, { "symbol": 6, "tone_index": 2, "confidence_db": 28.92, "powers": [ 0.1060939743, 0.1064017103, 83.0649691812, 0.1058247328, 0.1027968836, 0.1002472492, 0.0945580448, 0.088818472 ] } ] } ], "decodes": [], "warnings": [ "No JS8 text decode is expected in Step 49. Final real LDPC/FEC and Varicode/message unpack are not implemented yet.", "Costas7 scoring is a lab candidate extractor; real decoder validation requires actual JS8 WAV samples." ], "next_action": "Run sync-probe on real JS8 WAV captures. If stable sync_candidates appear, Step 49 can continue soft-symbol metric extraction for the LDPC/FEC path." } }, "real_run_quick_prefilter": { "name": "20260527T110128Z_real_run_quick_prefilter_output.json", "path": "/decoders/js8_decoder/logs/20260527T110128Z_real_run_quick_prefilter_output.json", "url": "/logs/20260527T110128Z_real_run_quick_prefilter_output.json", "stat": { "exists": true, "is_file": true, "is_dir": false, "size": 8815, "mtime_utc": "2026-05-27T11:01:42Z" }, "json_preview": { "ok": true, "mode": "JS8", "tool": "webftr-js8-quick-window-scan", "tool_version": "step51-source-aligned-tone-offset-cli-fix", "input_wav": "/decoders/js8_test.wav", "rx_only": true, "safety": { "tx": false, "ptt": false, "tune": false, "send": false, "js8call_runtime_control": false }, "wav": { "sample_rate": 12000, "duration_seconds": 192.016583, "frames": 2304199, "rms_dbfs": -9.164808449038551, "peak_dbfs": -0.7246929351669301, "clipped": false }, "scan_params": { "window_seconds": 60.0, "hop_seconds": 12.0, "max_seconds": 180.0, "output_dir": "/decoders/js8_decoder/runtime/quick_prefilter_windows" }, "selected_window": { "start_seconds": 24.0, "end_seconds": 84.0, "duration_seconds": 60.0, "avg_activity_score": -6.2272, "active_chunks": 5, "chunk_count": 5, "selection_score": 11.2728, "window_wav": "/decoders/js8_decoder/runtime/quick_prefilter_windows/js8_quick_selected_window.wav", "tone_candidates": [ { "freq_hz": 1025.0, "relative_db": 0.0, "power": 7.98385996 }, { "freq_hz": 1000.0, "relative_db": -0.38, "power": 7.31762699 }, { "freq_hz": 2025.0, "relative_db": -9.29, "power": 0.93974646 }, { "freq_hz": 975.0, "relative_db": -13.3, "power": 0.37314359 }, { "freq_hz": 1050.0, "relative_db": -25.6, "power": 0.02199227 }, { "freq_hz": 1775.0, "relative_db": -27.4, "power": 0.01453049 }, { "freq_hz": 1150.0, "relative_db": -27.44, "power": 0.01439727 }, { "freq_hz": 1425.0, "relative_db": -28.11, "power": 0.01233556 }, { "freq_hz": 1250.0, "relative_db": -29.08, "power": 0.00987629 }, { "freq_hz": 1825.0, "relative_db": -29.2, "power": 0.00959995 }, { "freq_hz": 1950.0, "relative_db": -29.78, "power": 0.00840634 }, { "freq_hz": 950.0, "relative_db": -29.91, "power": 0.00814511 } ] }, "selected_window_wav": "/decoders/js8_decoder/runtime/quick_prefilter_windows/js8_quick_selected_window.wav", "top_windows": [ { "start_seconds": 24.0, "end_seconds": 84.0, "duration_seconds": 60.0, "avg_activity_score": -6.2272, "active_chunks": 5, "chunk_count": 5, "selection_score": 11.2728, "window_wav": "/decoders/js8_decoder/runtime/quick_prefilter_windows/js8_quick_selected_window.wav", "tone_candidates": [ { "freq_hz": 1025.0, "relative_db": 0.0, "power": 7.98385996 }, { "freq_hz": 1000.0, "relative_db": -0.38, "power": 7.31762699 }, { "freq_hz": 2025.0, "relative_db": -9.29, "power": 0.93974646 }, { "freq_hz": 975.0, "relative_db": -13.3, "power": 0.37314359 }, { "freq_hz": 1050.0, "relative_db": -25.6, "power": 0.02199227 }, { "freq_hz": 1775.0, "relative_db": -27.4, "power": 0.01453049 }, { "freq_hz": 1150.0, "relative_db": -27.44, "power": 0.01439727 }, { "freq_hz": 1425.0, "relative_db": -28.11, "power": 0.01233556 }, { "freq_hz": 1250.0, "relative_db": -29.08, "power": 0.00987629 }, { "freq_hz": 1825.0, "relative_db": -29.2, "power": 0.00959995 }, { "freq_hz": 1950.0, "relative_db": -29.78, "power": 0.00840634 }, { "freq_hz": 950.0, "relative_db": -29.91, "power": 0.00814511 } ] }, { "start_seconds": 12.0, "end_seconds": 72.0, "duration_seconds": 60.0, "avg_activity_score": -6.2278, "active_chunks": 5, "chunk_count": 5, "selection_score": 11.2722 }, { "start_seconds": 36.0, "end_seconds": 96.0, "duration_seconds": 60.0, "avg_activity_score": -6.2346, "active_chunks": 5, "chunk_count": 5, "selection_score": 11.2654 }, { "start_seconds": 48.0, "end_seconds": 108.0, "duration_seconds": 60.0, "avg_activity_score": -6.2483, "active_chunks": 5, "chunk_count": 5, "selection_score": 11.2517 }, { "start_seconds": 0.0, "end_seconds": 60.0, "duration_seconds": 60.0, "avg_activity_score": -6.2606, "active_chunks": 5, "chunk_count": 5, "selection_score": 11.2394 }, { "start_seconds": 60.0, "end_seconds": 120.0, "duration_seconds": 60.0, "avg_activity_score": -6.2619, "active_chunks": 5, "chunk_count": 5, "selection_score": 11.2381 }, { "start_seconds": 108.0, "end_seconds": 168.0, "duration_seconds": 60.0, "avg_activity_score": -6.2716, "active_chunks": 5, "chunk_count": 5, "selection_score": 11.2284 }, { "start_seconds": 72.0, "end_seconds": 132.0, "duration_seconds": 60.0, "avg_activity_score": -6.2752, "active_chunks": 5, "chunk_count": 5, "selection_score": 11.2248 } ], "chunk_preview": [ { "chunk_index": 0, "start_seconds": 0.0, "end_seconds": 12.0, "rms_dbfs": -9.07, "peak_dbfs": -3.22, "activity_score": -6.2351 }, { "chunk_index": 1, "start_seconds": 12.0, "end_seconds": 24.0, "rms_dbfs": -9.27, "peak_dbfs": -3.01, "activity_score": -6.4225 }, { "chunk_index": 2, "start_seconds": 24.0, "end_seconds": 36.0, "rms_dbfs": -9.24, "peak_dbfs": -2.73, "activity_score": -6.3769 }, { "chunk_index": 3, "start_seconds": 36.0, "end_seconds": 48.0, "rms_dbfs": -9.24, "peak_dbfs": -2.39, "activity_score": -6.3632 }, { "chunk_index": 4, "start_seconds": 48.0, "end_seconds": 60.0, "rms_dbfs": -8.87, "peak_dbfs": -0.72, "activity_score": -5.9054 }, { "chunk_index": 5, "start_seconds": 60.0, "end_seconds": 72.0, "rms_dbfs": -9.03, "peak_dbfs": -0.72, "activity_score": -6.0711 }, { "chunk_index": 6, "start_seconds": 72.0, "end_seconds": 84.0, "rms_dbfs": -9.26, "peak_dbfs": -3.1, "activity_score": -6.4194 }, { "chunk_index": 7, "start_seconds": 84.0, "end_seconds": 96.0, "rms_dbfs": -9.29, "peak_dbfs": -2.42, "activity_score": -6.4141 } ], "chunk_tail_preview": [ { "chunk_index": 7, "start_seconds": 84.0, "end_seconds": 96.0, "rms_dbfs": -9.29, "peak_dbfs": -2.42, "activity_score": -6.4141 }, { "chunk_index": 8, "start_seconds": 96.0, "end_seconds": 108.0, "rms_dbfs": -9.3, "peak_dbfs": -2.65, "activity_score": -6.4314 }, { "chunk_index": 9, "start_seconds": 108.0, "end_seconds": 120.0, "rms_dbfs": -8.87, "peak_dbfs": -2.1, "activity_score": -5.9734 }, { "chunk_index": 10, "start_seconds": 120.0, "end_seconds": 132.0, "rms_dbfs": -9.02, "peak_dbfs": -2.36, "activity_score": -6.1378 }, { "chunk_index": 11, "start_seconds": 132.0, "end_seconds": 144.0, "rms_dbfs": -9.41, "peak_dbfs": -0.72, "activity_score": -6.4474 }, { "chunk_index": 12, "start_seconds": 144.0, "end_seconds": 156.0, "rms_dbfs": -9.3, "peak_dbfs": -2.31, "activity_score": -6.4185 }, { "chunk_index": 13, "start_seconds": 156.0, "end_seconds": 168.0, "rms_dbfs": -9.34, "peak_dbfs": -0.89, "activity_score": -6.3807 }, { "chunk_index": 14, "start_seconds": 168.0, "end_seconds": 180.0, "rms_dbfs": -8.99, "peak_dbfs": -3.03, "activity_score": -6.1457 } ], "decodes": [], "warnings": [ "Quick-window-scan only selects a likely analysis window; it is not a JS8 text decoder." ], "next_action": "Run sync/soft-symbol/FEC probes on selected_window_wav. Message unpack is not implemented in Step 51." } }, "real_run_dirty_window_scan": { "name": "20260527T110128Z_real_run_dirty_window_scan_output.json", "path": "/decoders/js8_decoder/logs/20260527T110128Z_real_run_dirty_window_scan_output.json", "url": "/logs/20260527T110128Z_real_run_dirty_window_scan_output.json", "stat": { "exists": true, "is_file": true, "is_dir": false, "size": 1269, "mtime_utc": "2026-05-27T11:02:43Z" }, "json_preview": { "ok": false, "error": "json_command_timeout_guard", "timeout_seconds": 60, "exit_code": 143, "command": [ "python3", "-m", "webftr_js8_lab.js8_dirty_window_scan", "--input", "/decoders/js8_decoder/runtime/quick_prefilter_windows/js8_quick_selected_window.wav", "--pretty", "--window-seconds", "54", "--hop-seconds", "30", "--max-seconds", "75", "--max-windows", "1", "--max-starts", "3", "--max-base-candidates", "2", "--output-dir", "/decoders/js8_decoder/runtime/dirty_windows", "--prefer-js8" ], "stderr_log": "/decoders/js8_decoder/logs/20260527T110128Z_real_run_dirty_window_scan_output.stderr.log", "stderr_tail": "/decoders/js8_decoder/src/webftr_js8_lab/js8_dirty_window_scan.py:4: DeprecationWarning: 'audioop' is deprecated and slated for removal in Python 3.13\n import audioop\n", "rx_only": true, "safety": { "tx": false, "ptt": false, "tune": false, "send": false, "js8call_runtime_control": false }, "next_action": "Step 51 timeout guard stopped this expensive probe; preserved partial timing JSON when available. The real-run now continues with quick-window fallback when available; otherwise inspect stderr/log bundle." } }, "dirty_window_scan": { "name": "20260527T110128Z_real_run_dirty_window_scan_output.json", "path": "/decoders/js8_decoder/logs/20260527T110128Z_real_run_dirty_window_scan_output.json", "url": "/logs/20260527T110128Z_real_run_dirty_window_scan_output.json", "stat": { "exists": true, "is_file": true, "is_dir": false, "size": 1269, "mtime_utc": "2026-05-27T11:02:43Z" }, "json_preview": { "ok": false, "error": "json_command_timeout_guard", "timeout_seconds": 60, "exit_code": 143, "command": [ "python3", "-m", "webftr_js8_lab.js8_dirty_window_scan", "--input", "/decoders/js8_decoder/runtime/quick_prefilter_windows/js8_quick_selected_window.wav", "--pretty", "--window-seconds", "54", "--hop-seconds", "30", "--max-seconds", "75", "--max-windows", "1", "--max-starts", "3", "--max-base-candidates", "2", "--output-dir", "/decoders/js8_decoder/runtime/dirty_windows", "--prefer-js8" ], "stderr_log": "/decoders/js8_decoder/logs/20260527T110128Z_real_run_dirty_window_scan_output.stderr.log", "stderr_tail": "/decoders/js8_decoder/src/webftr_js8_lab/js8_dirty_window_scan.py:4: DeprecationWarning: 'audioop' is deprecated and slated for removal in Python 3.13\n import audioop\n", "rx_only": true, "safety": { "tx": false, "ptt": false, "tune": false, "send": false, "js8call_runtime_control": false }, "next_action": "Step 51 timeout guard stopped this expensive probe; preserved partial timing JSON when available. The real-run now continues with quick-window fallback when available; otherwise inspect stderr/log bundle." } }, "ldpc_soft_decode": { "name": "20260527T111112Z_ldpc_soft_decode_output.json", "path": "/decoders/js8_decoder/logs/20260527T111112Z_ldpc_soft_decode_output.json", "url": "/logs/20260527T111112Z_ldpc_soft_decode_output.json", "stat": { "exists": true, "is_file": true, "is_dir": false, "size": 112544, "mtime_utc": "2026-05-27T11:11:21Z" }, "json_preview": { "ok": true, "mode": "JS8", "tool": "webftr-js8-soft-ldpc-minsum-probe", "tool_version": "step51-source-aligned-tone-offset-cli-fix", "input_wav": null, "candidate_json": "/decoders/js8_decoder/runtime/timing_boundary_sweep/step51_source_aligned_best_timing_fec_candidate.json", "rx_only": true, "safety": { "tx": false, "ptt": false, "tune": false, "send": false, "js8call_runtime_control": false }, "implementation_stage": "step43_direct_primary_syndrome_closure_repair_candidates_no_message_unpack", "matrix": { "code": "(174,91)", "message_bits": 91, "parity_bits": 83, "codeword_bits": 174, "check_count": 83 }, "decoder": { "algorithm": "normalized_min_sum_multi_trial", "max_iterations": 32, "default_alpha": 0.8, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely", "mapping_expansion": "ft8_gray_demap_plus_bitrev_interleaver_candidates", "max_decode_rows": 1, "fast_trials": true, "trial_count": 2, "timeout_avoidance": "direct_primary_first_default_1_row", "direct_timing_primary_preserved": true, "hard_repair_probe": { "repair_rows": 1, "repair_pool_size": 18, "repair_max_depth": 2 } }, "candidate_context": { "nsps_used": 6192, "nsps_is_js8_realistic": true, "selected_profile": null, "selected_variant": { "name": "step43_timing_sweep_best_syndrome_row", "rank_score": 1105.166392, "complete_174bit_candidate": true, "hard_bits_sha256_16": "95a1e941fbdff6b2", "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 1.291598, "min_abs": 0.001433, "max_abs": 3.895705, "positive": 129, "negative": 45, "zero": 0 } } }, "candidate_mapping_rows": 865, "probe_count": 2, "best_soft_decode": { "variant": "step43_timing_sweep_best_syndrome_row", "transform": "direct_timing_sweep_primary", "mapping_meta": { "direct_timing_sweep_primary": true, "source_mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "source_transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "source_variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver" }, "decoder_trial": { "llr_scale": 0.75, "alpha": 0.7 }, "source_rank_score": 3105.166392, "source_llr_stats": { "count": 174, "avg_abs": 1.291598, "min_abs": 0.001433, "max_abs": 3.895705, "positive": 129, "negative": 45, "zero": 0 }, "success": false, "iterations_used": 32, "final_syndrome_weight": 33, "message91": null, "message91_sha256_16": "f36bdab26772186a", "codeword174_sha256_16": "96bf7b01bb067d48", "trace": [ { "iteration": 0, "syndrome_weight": 43 }, { "iteration": 1, "syndrome_weight": 40 }, { "iteration": 2, "syndrome_weight": 42 }, { "iteration": 3, "syndrome_weight": 37 }, { "iteration": 4, "syndrome_weight": 40 }, { "iteration": 5, "syndrome_weight": 39 }, { "iteration": 6, "syndrome_weight": 48 }, { "iteration": 7, "syndrome_weight": 37 }, { "iteration": 8, "syndrome_weight": 41 }, { "iteration": 9, "syndrome_weight": 39 }, { "iteration": 10, "syndrome_weight": 44 }, { "iteration": 15, "syndrome_weight": 40 }, { "iteration": 20, "syndrome_weight": 44 }, { "iteration": 25, "syndrome_weight": 45 }, { "iteration": 30, "syndrome_weight": 41 } ], "hard_repair_probe": { "ok": true, "initial_syndrome_weight": 22, "best_syndrome_weight": 21, "best_flip_indices": [ 91 ], "best_flip_count": 1, "pool_size": 18, "max_depth": 2, "probes": 171, "valid_codeword_hard_decision": false, "message91_sha256_16": "d4ca2a05f15dd009", "codeword174_sha256_16": "4cf9e06f787f90f7" }, "syndrome_closure_repair_probe": { "ok": true, "diagnostic_only": true, "method": "systematic_syndrome_closure_ranked_by_llr_cost", "initial_syndrome_weight": 22, "initial_unsatisfied_checks": [ 0, 3, 4, 12, 14, 17, 27, 30, 31, 33, 34, 36, 38, 44, 45, 46, 51, 61, 62, 68, 77, 81 ], "message_pool_size": 18, "message_pool_indices": [ 8, 80, 29, 60, 32, 4, 37, 67, 19, 64, 52, 47, 54, 24, 79, 69, 70, 90 ], "max_message_depth": 3, "evaluated_candidates": 988, "best": { "message_flip_indices": [ 29, 52, 24 ], "parity_flip_indices": [ 93, 95, 96, 99, 101, 102, 104, 106, 111, 113, 117, 123, 125, 127, 128, 129, 131, 133, 134, 135, 141, 147, 149, 159, 160, 161, 162, 163, 166, 170, 171 ], "all_flip_indices": [ 29, 52, 24, 93, 95, 96, 99, 101, 102, 104, 106, 111, 113, 117, 123, 125, 127, 128, 129, 131, 133, 134, 135, 141, 147, 149, 159, 160, 161, 162, 163, 166, 170, 171 ], "message_flip_count": 3, "parity_flip_count": 31, "total_flip_count": 34, "message_flip_cost": 0.200562, "parity_flip_cost": 26.763065, "total_reliability_cost": 26.963627, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001001100010000000010001000000000110000000000000001100000000101000100110", "message91_sha256_16": "4969d515d475345c", "codeword174_sha256_16": "5eb7a37dfa462a9d" }, "top_candidates": [ { "message_flip_indices": [ 29, 52, 24 ], "parity_flip_indices": [ 93, 95, 96, 99, 101, 102, 104, 106, 111, 113, 117, 123, 125, 127, 128, 129, 131, 133, 134, 135, 141, 147, 149, 159, 160, 161, 162, 163, 166, 170, 171 ], "all_flip_indices": [ 29, 52, 24, 93, 95, 96, 99, 101, 102, 104, 106, 111, 113, 117, 123, 125, 127, 128, 129, 131, 133, 134, 135, 141, 147, 149, 159, 160, 161, 162, 163, 166, 170, 171 ], "message_flip_count": 3, "parity_flip_count": 31, "total_flip_count": 34, "message_flip_cost": 0.200562, "parity_flip_cost": 26.763065, "total_reliability_cost": 26.963627, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001001100010000000010001000000000110000000000000001100000000101000100110", "message91_sha256_16": "4969d515d475345c", "codeword174_sha256_16": "5eb7a37dfa462a9d" }, { "message_flip_indices": [], "parity_flip_indices": [ 91, 94, 95, 103, 105, 108, 118, 121, 122, 124, 125, 127, 129, 135, 136, 137, 142, 152, 153, 159, 168, 172 ], "all_flip_indices": [ 91, 94, 95, 103, 105, 108, 118, 121, 122, 124, 125, 127, 129, 135, 136, 137, 142, 152, 153, 159, 168, 172 ], "message_flip_count": 0, "parity_flip_count": 22, "total_flip_count": 22, "message_flip_cost": 0.0, "parity_flip_cost": 30.00735, "total_reliability_cost": 30.00735, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001000100000000000010001000000000010000000000000001100000000101000100110", "message91_sha256_16": "d4ca2a05f15dd009", "codeword174_sha256_16": "ceaa20e1644a6624" }, { "message_flip_indices": [ 32, 54, 69 ], "parity_flip_indices": [ 91, 92, 93, 100, 101, 104, 105, 106, 109, 112, 115, 116, 118, 120, 127, 134, 136, 138, 140, 145, 151, 158, 167, 168, 172 ], "all_flip_indices": [ 32, 54, 69, 91, 92, 93, 100, 101, 104, 105, 106, 109, 112, 115, 116, 118, 120, 127, 134, 136, 138, 140, 145, 151, 158, 167, 168, 172 ], "message_flip_count": 3, "parity_flip_count": 25, "total_flip_count": 28, "message_flip_cost": 0.356944, "parity_flip_cost": 29.730529, "total_reliability_cost": 30.087473, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001000100000010000010001000000000011000000000000000100000000101000100110", "message91_sha256_16": "c7b3956c1566b60c", "codeword174_sha256_16": "c674187693259e74" }, { "message_flip_indices": [ 4, 19, 64 ], "parity_flip_indices": [ 91, 101, 102, 106, 110, 111, 112, 113, 117, 118, 120, 126, 128, 129, 135, 138, 142, 143, 145, 146, 147, 150, 154, 157, 159, 160, 161, 162, 165, 171, 172 ], "all_flip_indices": [ 4, 19, 64, 91, 101, 102, 106, 110, 111, 112, 113, 117, 118, 120, 126, 128, 129, 135, 138, 142, 143, 145, 146, 147, 150, 154, 157, 159, 160, 161, 162, 165, 171, 172 ], "message_flip_count": 3, "parity_flip_count": 31, "total_flip_count": 34, "message_flip_cost": 0.101419, "parity_flip_cost": 31.795027, "total_reliability_cost": 31.896446, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000100100000001000101000100000000000010001000000000010000000000100001100000000101000100110", "message91_sha256_16": "a2c47af107dec776", "codeword174_sha256_16": "8b5ec7d6029ef1fa" }, { "message_flip_indices": [ 8, 80, 54 ], "parity_flip_indices": [ 93, 95, 96, 97, 99, 100, 102, 106, 107, 108, 112, 118, 123, 125, 127, 129, 130, 131, 134, 135, 136, 138, 141, 144, 149, 153, 155, 160, 161, 162, 167, 170, 172 ], "all_flip_indices": [ 8, 80, 54, 93, 95, 96, 97, 99, 100, 102, 106, 107, 108, 112, 118, 123, 125, 127, 129, 130, 131, 134, 135, 136, 138, 141, 144, 149, 153, 155, 160, 161, 162, 167, 170, 172 ], "message_flip_count": 3, "parity_flip_count": 33, "total_flip_count": 36, "message_flip_cost": 0.112312, "parity_flip_cost": 31.909172, "total_reliability_cost": 32.021484, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000110000001000001000100000000000010001000000000011000000000000001100000000111000100110", "message91_sha256_16": "53280bfeb41c2e78", "codeword174_sha256_16": "da214f762455b3fd" }, { "message_flip_indices": [ 24 ], "parity_flip_indices": [ 91, 94, 96, 97, 98, 99, 104, 105, 106, 107, 108, 113, 115, 116, 118, 122, 124, 125, 126, 133, 134, 135, 138, 141, 146, 150, 153, 154, 156, 157, 163, 164, 170 ], "all_flip_indices": [ 24, 91, 94, 96, 97, 98, 99, 104, 105, 106, 107, 108, 113, 115, 116, 118, 122, 124, 125, 126, 133, 134, 135, 138, 141, 146, 150, 153, 154, 156, 157, 163, 164, 170 ], "message_flip_count": 1, "parity_flip_count": 33, "total_flip_count": 34, "message_flip_cost": 0.120611, "parity_flip_cost": 32.322615, "total_reliability_cost": 32.443226, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001001100000000000010001000000000010000000000000001100000000101000100110", "message91_sha256_16": "7b4f0bbb486c2729", "codeword174_sha256_16": "c60be927dc9a8795" }, { "message_flip_indices": [ 67, 54, 79 ], "parity_flip_indices": [ 94, 96, 100, 103, 105, 108, 112, 116, 118, 122, 124, 125, 127, 128, 133, 134, 135, 140, 141, 146, 147, 150, 152, 153, 154, 157, 169, 172, 173 ], "all_flip_indices": [ 67, 54, 79, 94, 96, 100, 103, 105, 108, 112, 116, 118, 122, 124, 125, 127, 128, 133, 134, 135, 140, 141, 146, 147, 150, 152, 153, 154, 157, 169, 172, 173 ], "message_flip_count": 3, "parity_flip_count": 29, "total_flip_count": 32, "message_flip_cost": 0.334, "parity_flip_cost": 32.688588, "total_reliability_cost": 33.022588, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001000100000000000010001000000000011000000000000101100000000001000100110", "message91_sha256_16": "ea6738f37fdd0bca", "codeword174_sha256_16": "e64696234a9e9700" }, { "message_flip_indices": [ 8, 4 ], "parity_flip_indices": [ 91, 93, 95, 101, 103, 110, 112, 117, 118, 123, 125, 126, 127, 129, 135, 137, 140, 141, 143, 145, 149, 152, 154, 156, 160, 168, 172, 173 ], "all_flip_indices": [ 8, 4, 91, 93, 95, 101, 103, 110, 112, 117, 118, 123, 125, 126, 127, 129, 135, 137, 140, 141, 143, 145, 149, 152, 154, 156, 160, 168, 172, 173 ], "message_flip_count": 2, "parity_flip_count": 28, "total_flip_count": 30, "message_flip_cost": 0.020221, "parity_flip_cost": 33.270029, "total_reliability_cost": 33.29025, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000100110000001000001000100000000000010001000000000010000000000000001100000000101000100110", "message91_sha256_16": "36258d9d38b0281f", "codeword174_sha256_16": "cb03d310703a3bef" }, { "message_flip_indices": [ 80, 32 ], "parity_flip_indices": [ 95, 97, 99, 100, 102, 103, 108, 109, 121, 123, 124, 126, 127, 128, 129, 133, 141, 142, 143, 148, 151, 155, 157, 159, 160, 163, 165, 166, 167, 168, 170, 171 ], "all_flip_indices": [ 80, 32, 95, 97, 99, 100, 102, 103, 108, 109, 121, 123, 124, 126, 127, 128, 129, 133, 141, 142, 143, 148, 151, 155, 157, 159, 160, 163, 165, 166, 167, 168, 170, 171 ], "message_flip_count": 2, "parity_flip_count": 32, "total_flip_count": 34, "message_flip_cost": 0.01723, "parity_flip_cost": 33.416528, "total_reliability_cost": 33.433758, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001000100000010000010001000000000010000000000000001100000000111000100110", "message91_sha256_16": "d1dd1f00eea52156", "codeword174_sha256_16": "4529cc6ea45b8c15" }, { "message_flip_indices": [ 37, 52, 54 ], "parity_flip_indices": [ 93, 95, 96, 98, 99, 100, 102, 106, 107, 108, 111, 112, 116, 118, 120, 123, 125, 127, 130, 133, 134, 135, 136, 138, 141, 144, 154, 155, 160, 161, 165, 167, 170 ], "all_flip_indices": [ 37, 52, 54, 93, 95, 96, 98, 99, 100, 102, 106, 107, 108, 111, 112, 116, 118, 120, 123, 125, 127, 130, 133, 134, 135, 136, 138, 141, 144, 154, 155, 160, 161, 165, 167, 170 ], "message_flip_count": 3, "parity_flip_count": 33, "total_flip_count": 36, "message_flip_cost": 0.212962, "parity_flip_cost": 33.260317, "total_reliability_cost": 33.473279, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001000100000000000110001000000000111000000000000001100000000101000100110", "message91_sha256_16": "f89221702d6c6b08", "codeword174_sha256_16": "17b3bb4d1d83b9f3" }, { "message_flip_indices": [ 80, 69, 90 ], "parity_flip_indices": [ 91, 93, 95, 97, 99, 100, 101, 102, 103, 106, 109, 110, 113, 117, 124, 125, 133, 135, 137, 140, 146, 149, 153, 154, 157, 160, 161, 163, 164, 165, 166, 167, 168, 170, 173 ], "all_flip_indices": [ 80, 69, 90, 91, 93, 95, 97, 99, 100, 101, 102, 103, 106, 109, 110, 113, 117, 124, 125, 133, 135, 137, 140, 146, 149, 153, 154, 157, 160, 161, 163, 164, 165, 166, 167, 168, 170, 173 ], "message_flip_count": 3, "parity_flip_count": 35, "total_flip_count": 38, "message_flip_cost": 0.520175, "parity_flip_cost": 33.163717, "total_reliability_cost": 33.683892, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001000100000000000010001000000000010000000000000000100000000111000100111", "message91_sha256_16": "c8c54b0e1ae8c13f", "codeword174_sha256_16": "283f17c6b9b19017" }, { "message_flip_indices": [ 47, 24, 69 ], "parity_flip_indices": [ 92, 93, 94, 95, 99, 100, 101, 102, 105, 108, 109, 110, 123, 124, 129, 134, 135, 136, 138, 141, 142, 143, 145, 146, 153, 154, 158, 159, 160, 161, 162, 164, 165, 166, 167, 170, 172 ], "all_flip_indices": [ 47, 24, 69, 92, 93, 94, 95, 99, 100, 101, 102, 105, 108, 109, 110, 123, 124, 129, 134, 135, 136, 138, 141, 142, 143, 145, 146, 153, 154, 158, 159, 160, 161, 162, 164, 165, 166, 167, 170, 172 ], "message_flip_count": 3, "parity_flip_count": 37, "total_flip_count": 40, "message_flip_cost": 0.429542, "parity_flip_cost": 33.702714, "total_reliability_cost": 34.132256, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001001100000000000010001000010000010000000000000000100000000101000100110", "message91_sha256_16": "937bbbe6622a93b8", "codeword174_sha256_16": "24013711efc6e35f" } ], "warning": "Syndrome closure can always form a codeword by parity repair; this is only a ranked candidate generator until JS8 message unpack/CRC validates a candidate." } }, "best_hard_repair_probe": { "ok": true, "initial_syndrome_weight": 22, "best_syndrome_weight": 21, "best_flip_indices": [ 91 ], "best_flip_count": 1, "pool_size": 18, "max_depth": 2, "probes": 171, 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"e64696234a9e9700" }, { "message_flip_indices": [ 8, 4 ], "parity_flip_indices": [ 91, 93, 95, 101, 103, 110, 112, 117, 118, 123, 125, 126, 127, 129, 135, 137, 140, 141, 143, 145, 149, 152, 154, 156, 160, 168, 172, 173 ], "all_flip_indices": [ 8, 4, 91, 93, 95, 101, 103, 110, 112, 117, 118, 123, 125, 126, 127, 129, 135, 137, 140, 141, 143, 145, 149, 152, 154, 156, 160, 168, 172, 173 ], "message_flip_count": 2, "parity_flip_count": 28, "total_flip_count": 30, "message_flip_cost": 0.020221, "parity_flip_cost": 33.270029, "total_reliability_cost": 33.29025, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000100110000001000001000100000000000010001000000000010000000000000001100000000101000100110", "message91_sha256_16": "36258d9d38b0281f", "codeword174_sha256_16": "cb03d310703a3bef" }, { "message_flip_indices": [ 80, 32 ], "parity_flip_indices": [ 95, 97, 99, 100, 102, 103, 108, 109, 121, 123, 124, 126, 127, 128, 129, 133, 141, 142, 143, 148, 151, 155, 157, 159, 160, 163, 165, 166, 167, 168, 170, 171 ], "all_flip_indices": [ 80, 32, 95, 97, 99, 100, 102, 103, 108, 109, 121, 123, 124, 126, 127, 128, 129, 133, 141, 142, 143, 148, 151, 155, 157, 159, 160, 163, 165, 166, 167, 168, 170, 171 ], "message_flip_count": 2, "parity_flip_count": 32, "total_flip_count": 34, "message_flip_cost": 0.01723, "parity_flip_cost": 33.416528, "total_reliability_cost": 33.433758, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001000100000010000010001000000000010000000000000001100000000111000100110", "message91_sha256_16": "d1dd1f00eea52156", "codeword174_sha256_16": "4529cc6ea45b8c15" }, { "message_flip_indices": [ 37, 52, 54 ], "parity_flip_indices": [ 93, 95, 96, 98, 99, 100, 102, 106, 107, 108, 111, 112, 116, 118, 120, 123, 125, 127, 130, 133, 134, 135, 136, 138, 141, 144, 154, 155, 160, 161, 165, 167, 170 ], "all_flip_indices": [ 37, 52, 54, 93, 95, 96, 98, 99, 100, 102, 106, 107, 108, 111, 112, 116, 118, 120, 123, 125, 127, 130, 133, 134, 135, 136, 138, 141, 144, 154, 155, 160, 161, 165, 167, 170 ], "message_flip_count": 3, "parity_flip_count": 33, "total_flip_count": 36, "message_flip_cost": 0.212962, "parity_flip_cost": 33.260317, "total_reliability_cost": 33.473279, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001000100000000000110001000000000111000000000000001100000000101000100110", "message91_sha256_16": "f89221702d6c6b08", "codeword174_sha256_16": "17b3bb4d1d83b9f3" }, { "message_flip_indices": [ 80, 69, 90 ], "parity_flip_indices": [ 91, 93, 95, 97, 99, 100, 101, 102, 103, 106, 109, 110, 113, 117, 124, 125, 133, 135, 137, 140, 146, 149, 153, 154, 157, 160, 161, 163, 164, 165, 166, 167, 168, 170, 173 ], "all_flip_indices": [ 80, 69, 90, 91, 93, 95, 97, 99, 100, 101, 102, 103, 106, 109, 110, 113, 117, 124, 125, 133, 135, 137, 140, 146, 149, 153, 154, 157, 160, 161, 163, 164, 165, 166, 167, 168, 170, 173 ], "message_flip_count": 3, "parity_flip_count": 35, "total_flip_count": 38, "message_flip_cost": 0.520175, "parity_flip_cost": 33.163717, "total_reliability_cost": 33.683892, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001000100000000000010001000000000010000000000000000100000000111000100111", "message91_sha256_16": "c8c54b0e1ae8c13f", "codeword174_sha256_16": "283f17c6b9b19017" }, { "message_flip_indices": [ 47, 24, 69 ], "parity_flip_indices": [ 92, 93, 94, 95, 99, 100, 101, 102, 105, 108, 109, 110, 123, 124, 129, 134, 135, 136, 138, 141, 142, 143, 145, 146, 153, 154, 158, 159, 160, 161, 162, 164, 165, 166, 167, 170, 172 ], "all_flip_indices": [ 47, 24, 69, 92, 93, 94, 95, 99, 100, 101, 102, 105, 108, 109, 110, 123, 124, 129, 134, 135, 136, 138, 141, 142, 143, 145, 146, 153, 154, 158, 159, 160, 161, 162, 164, 165, 166, 167, 170, 172 ], "message_flip_count": 3, "parity_flip_count": 37, "total_flip_count": 40, "message_flip_cost": 0.429542, "parity_flip_cost": 33.702714, "total_reliability_cost": 34.132256, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001001100000000000010001000010000010000000000000000100000000101000100110", "message91_sha256_16": "937bbbe6622a93b8", "codeword174_sha256_16": "24013711efc6e35f" } ], "warning": "Syndrome closure can always form a codeword by parity repair; this is only a ranked candidate generator until JS8 message unpack/CRC validates a candidate." } }, { "variant": "step43_timing_sweep_best_syndrome_row", "transform": "direct_timing_sweep_primary", "mapping_meta": { "direct_timing_sweep_primary": true, "source_mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "source_transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "source_variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver" }, "decoder_trial": { "llr_scale": 1.0, "alpha": 0.8 }, "source_rank_score": 3105.166392, "source_llr_stats": { "count": 174, "avg_abs": 1.291598, "min_abs": 0.001433, "max_abs": 3.895705, "positive": 129, "negative": 45, "zero": 0 }, "success": false, "iterations_used": 32, "final_syndrome_weight": 34, "message91": null, "message91_sha256_16": "9586359777910051", "codeword174_sha256_16": "67141e7930f85c33", "trace": [ { "iteration": 0, "syndrome_weight": 43 }, { "iteration": 1, "syndrome_weight": 40 }, { "iteration": 2, "syndrome_weight": 42 }, { "iteration": 3, "syndrome_weight": 35 }, { "iteration": 4, "syndrome_weight": 40 }, { "iteration": 5, "syndrome_weight": 36 }, { "iteration": 6, "syndrome_weight": 40 }, { "iteration": 7, "syndrome_weight": 35 }, { "iteration": 8, "syndrome_weight": 37 }, { "iteration": 9, "syndrome_weight": 44 }, { "iteration": 10, "syndrome_weight": 35 }, { "iteration": 15, "syndrome_weight": 42 }, { "iteration": 20, "syndrome_weight": 42 }, { "iteration": 25, "syndrome_weight": 41 }, { "iteration": 30, "syndrome_weight": 39 } ], "hard_repair_probe": { "ok": true, "initial_syndrome_weight": 22, "best_syndrome_weight": 21, "best_flip_indices": [ 91 ], "best_flip_count": 1, "pool_size": 18, "max_depth": 2, "probes": 171, "valid_codeword_hard_decision": false, "message91_sha256_16": "d4ca2a05f15dd009", "codeword174_sha256_16": "4cf9e06f787f90f7" }, "syndrome_closure_repair_probe": { "ok": true, "diagnostic_only": true, "method": "systematic_syndrome_closure_ranked_by_llr_cost", "initial_syndrome_weight": 22, "initial_unsatisfied_checks": [ 0, 3, 4, 12, 14, 17, 27, 30, 31, 33, 34, 36, 38, 44, 45, 46, 51, 61, 62, 68, 77, 81 ], "message_pool_size": 18, "message_pool_indices": [ 8, 80, 29, 60, 32, 4, 37, 67, 19, 64, 52, 47, 54, 24, 79, 69, 70, 90 ], "max_message_depth": 3, "evaluated_candidates": 988, "best": { "message_flip_indices": [ 29, 52, 24 ], "parity_flip_indices": [ 93, 95, 96, 99, 101, 102, 104, 106, 111, 113, 117, 123, 125, 127, 128, 129, 131, 133, 134, 135, 141, 147, 149, 159, 160, 161, 162, 163, 166, 170, 171 ], "all_flip_indices": [ 29, 52, 24, 93, 95, 96, 99, 101, 102, 104, 106, 111, 113, 117, 123, 125, 127, 128, 129, 131, 133, 134, 135, 141, 147, 149, 159, 160, 161, 162, 163, 166, 170, 171 ], "message_flip_count": 3, "parity_flip_count": 31, "total_flip_count": 34, "message_flip_cost": 0.200562, "parity_flip_cost": 26.763065, "total_reliability_cost": 26.963627, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001001100010000000010001000000000110000000000000001100000000101000100110", "message91_sha256_16": "4969d515d475345c", "codeword174_sha256_16": "5eb7a37dfa462a9d" }, "top_candidates": [ { "message_flip_indices": [ 29, 52, 24 ], "parity_flip_indices": [ 93, 95, 96, 99, 101, 102, 104, 106, 111, 113, 117, 123, 125, 127, 128, 129, 131, 133, 134, 135, 141, 147, 149, 159, 160, 161, 162, 163, 166, 170, 171 ], "all_flip_indices": [ 29, 52, 24, 93, 95, 96, 99, 101, 102, 104, 106, 111, 113, 117, 123, 125, 127, 128, 129, 131, 133, 134, 135, 141, 147, 149, 159, 160, 161, 162, 163, 166, 170, 171 ], "message_flip_count": 3, "parity_flip_count": 31, "total_flip_count": 34, "message_flip_cost": 0.200562, "parity_flip_cost": 26.763065, "total_reliability_cost": 26.963627, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001001100010000000010001000000000110000000000000001100000000101000100110", "message91_sha256_16": "4969d515d475345c", "codeword174_sha256_16": "5eb7a37dfa462a9d" }, { "message_flip_indices": [], "parity_flip_indices": [ 91, 94, 95, 103, 105, 108, 118, 121, 122, 124, 125, 127, 129, 135, 136, 137, 142, 152, 153, 159, 168, 172 ], "all_flip_indices": [ 91, 94, 95, 103, 105, 108, 118, 121, 122, 124, 125, 127, 129, 135, 136, 137, 142, 152, 153, 159, 168, 172 ], "message_flip_count": 0, "parity_flip_count": 22, "total_flip_count": 22, "message_flip_cost": 0.0, "parity_flip_cost": 30.00735, "total_reliability_cost": 30.00735, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001000100000000000010001000000000010000000000000001100000000101000100110", "message91_sha256_16": "d4ca2a05f15dd009", "codeword174_sha256_16": "ceaa20e1644a6624" }, { "message_flip_indices": [ 32, 54, 69 ], "parity_flip_indices": [ 91, 92, 93, 100, 101, 104, 105, 106, 109, 112, 115, 116, 118, 120, 127, 134, 136, 138, 140, 145, 151, 158, 167, 168, 172 ], "all_flip_indices": [ 32, 54, 69, 91, 92, 93, 100, 101, 104, 105, 106, 109, 112, 115, 116, 118, 120, 127, 134, 136, 138, 140, 145, 151, 158, 167, 168, 172 ], "message_flip_count": 3, "parity_flip_count": 25, "total_flip_count": 28, "message_flip_cost": 0.356944, "parity_flip_cost": 29.730529, "total_reliability_cost": 30.087473, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001000100000010000010001000000000011000000000000000100000000101000100110", "message91_sha256_16": "c7b3956c1566b60c", "codeword174_sha256_16": "c674187693259e74" }, { "message_flip_indices": [ 4, 19, 64 ], "parity_flip_indices": [ 91, 101, 102, 106, 110, 111, 112, 113, 117, 118, 120, 126, 128, 129, 135, 138, 142, 143, 145, 146, 147, 150, 154, 157, 159, 160, 161, 162, 165, 171, 172 ], "all_flip_indices": [ 4, 19, 64, 91, 101, 102, 106, 110, 111, 112, 113, 117, 118, 120, 126, 128, 129, 135, 138, 142, 143, 145, 146, 147, 150, 154, 157, 159, 160, 161, 162, 165, 171, 172 ], "message_flip_count": 3, "parity_flip_count": 31, "total_flip_count": 34, "message_flip_cost": 0.101419, "parity_flip_cost": 31.795027, "total_reliability_cost": 31.896446, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000100100000001000101000100000000000010001000000000010000000000100001100000000101000100110", "message91_sha256_16": "a2c47af107dec776", "codeword174_sha256_16": "8b5ec7d6029ef1fa" }, { "message_flip_indices": [ 8, 80, 54 ], "parity_flip_indices": [ 93, 95, 96, 97, 99, 100, 102, 106, 107, 108, 112, 118, 123, 125, 127, 129, 130, 131, 134, 135, 136, 138, 141, 144, 149, 153, 155, 160, 161, 162, 167, 170, 172 ], "all_flip_indices": [ 8, 80, 54, 93, 95, 96, 97, 99, 100, 102, 106, 107, 108, 112, 118, 123, 125, 127, 129, 130, 131, 134, 135, 136, 138, 141, 144, 149, 153, 155, 160, 161, 162, 167, 170, 172 ], "message_flip_count": 3, "parity_flip_count": 33, "total_flip_count": 36, "message_flip_cost": 0.112312, "parity_flip_cost": 31.909172, "total_reliability_cost": 32.021484, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000110000001000001000100000000000010001000000000011000000000000001100000000111000100110", "message91_sha256_16": "53280bfeb41c2e78", "codeword174_sha256_16": "da214f762455b3fd" }, { "message_flip_indices": [ 24 ], "parity_flip_indices": [ 91, 94, 96, 97, 98, 99, 104, 105, 106, 107, 108, 113, 115, 116, 118, 122, 124, 125, 126, 133, 134, 135, 138, 141, 146, 150, 153, 154, 156, 157, 163, 164, 170 ], "all_flip_indices": [ 24, 91, 94, 96, 97, 98, 99, 104, 105, 106, 107, 108, 113, 115, 116, 118, 122, 124, 125, 126, 133, 134, 135, 138, 141, 146, 150, 153, 154, 156, 157, 163, 164, 170 ], "message_flip_count": 1, "parity_flip_count": 33, "total_flip_count": 34, "message_flip_cost": 0.120611, "parity_flip_cost": 32.322615, "total_reliability_cost": 32.443226, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001001100000000000010001000000000010000000000000001100000000101000100110", "message91_sha256_16": "7b4f0bbb486c2729", "codeword174_sha256_16": "c60be927dc9a8795" }, { "message_flip_indices": [ 67, 54, 79 ], "parity_flip_indices": [ 94, 96, 100, 103, 105, 108, 112, 116, 118, 122, 124, 125, 127, 128, 133, 134, 135, 140, 141, 146, 147, 150, 152, 153, 154, 157, 169, 172, 173 ], "all_flip_indices": [ 67, 54, 79, 94, 96, 100, 103, 105, 108, 112, 116, 118, 122, 124, 125, 127, 128, 133, 134, 135, 140, 141, 146, 147, 150, 152, 153, 154, 157, 169, 172, 173 ], "message_flip_count": 3, "parity_flip_count": 29, "total_flip_count": 32, "message_flip_cost": 0.334, "parity_flip_cost": 32.688588, "total_reliability_cost": 33.022588, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001000100000000000010001000000000011000000000000101100000000001000100110", "message91_sha256_16": "ea6738f37fdd0bca", "codeword174_sha256_16": "e64696234a9e9700" }, { "message_flip_indices": [ 8, 4 ], "parity_flip_indices": [ 91, 93, 95, 101, 103, 110, 112, 117, 118, 123, 125, 126, 127, 129, 135, 137, 140, 141, 143, 145, 149, 152, 154, 156, 160, 168, 172, 173 ], "all_flip_indices": [ 8, 4, 91, 93, 95, 101, 103, 110, 112, 117, 118, 123, 125, 126, 127, 129, 135, 137, 140, 141, 143, 145, 149, 152, 154, 156, 160, 168, 172, 173 ], "message_flip_count": 2, "parity_flip_count": 28, "total_flip_count": 30, "message_flip_cost": 0.020221, "parity_flip_cost": 33.270029, "total_reliability_cost": 33.29025, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000100110000001000001000100000000000010001000000000010000000000000001100000000101000100110", "message91_sha256_16": "36258d9d38b0281f", "codeword174_sha256_16": "cb03d310703a3bef" }, { "message_flip_indices": [ 80, 32 ], "parity_flip_indices": [ 95, 97, 99, 100, 102, 103, 108, 109, 121, 123, 124, 126, 127, 128, 129, 133, 141, 142, 143, 148, 151, 155, 157, 159, 160, 163, 165, 166, 167, 168, 170, 171 ], "all_flip_indices": [ 80, 32, 95, 97, 99, 100, 102, 103, 108, 109, 121, 123, 124, 126, 127, 128, 129, 133, 141, 142, 143, 148, 151, 155, 157, 159, 160, 163, 165, 166, 167, 168, 170, 171 ], "message_flip_count": 2, "parity_flip_count": 32, "total_flip_count": 34, "message_flip_cost": 0.01723, "parity_flip_cost": 33.416528, "total_reliability_cost": 33.433758, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001000100000010000010001000000000010000000000000001100000000111000100110", "message91_sha256_16": "d1dd1f00eea52156", "codeword174_sha256_16": "4529cc6ea45b8c15" }, { "message_flip_indices": [ 37, 52, 54 ], "parity_flip_indices": [ 93, 95, 96, 98, 99, 100, 102, 106, 107, 108, 111, 112, 116, 118, 120, 123, 125, 127, 130, 133, 134, 135, 136, 138, 141, 144, 154, 155, 160, 161, 165, 167, 170 ], "all_flip_indices": [ 37, 52, 54, 93, 95, 96, 98, 99, 100, 102, 106, 107, 108, 111, 112, 116, 118, 120, 123, 125, 127, 130, 133, 134, 135, 136, 138, 141, 144, 154, 155, 160, 161, 165, 167, 170 ], "message_flip_count": 3, "parity_flip_count": 33, "total_flip_count": 36, "message_flip_cost": 0.212962, "parity_flip_cost": 33.260317, "total_reliability_cost": 33.473279, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001000100000000000110001000000000111000000000000001100000000101000100110", "message91_sha256_16": "f89221702d6c6b08", "codeword174_sha256_16": "17b3bb4d1d83b9f3" }, { "message_flip_indices": [ 80, 69, 90 ], "parity_flip_indices": [ 91, 93, 95, 97, 99, 100, 101, 102, 103, 106, 109, 110, 113, 117, 124, 125, 133, 135, 137, 140, 146, 149, 153, 154, 157, 160, 161, 163, 164, 165, 166, 167, 168, 170, 173 ], "all_flip_indices": [ 80, 69, 90, 91, 93, 95, 97, 99, 100, 101, 102, 103, 106, 109, 110, 113, 117, 124, 125, 133, 135, 137, 140, 146, 149, 153, 154, 157, 160, 161, 163, 164, 165, 166, 167, 168, 170, 173 ], "message_flip_count": 3, "parity_flip_count": 35, "total_flip_count": 38, "message_flip_cost": 0.520175, "parity_flip_cost": 33.163717, "total_reliability_cost": 33.683892, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001000100000000000010001000000000010000000000000000100000000111000100111", "message91_sha256_16": "c8c54b0e1ae8c13f", "codeword174_sha256_16": "283f17c6b9b19017" }, { "message_flip_indices": [ 47, 24, 69 ], "parity_flip_indices": [ 92, 93, 94, 95, 99, 100, 101, 102, 105, 108, 109, 110, 123, 124, 129, 134, 135, 136, 138, 141, 142, 143, 145, 146, 153, 154, 158, 159, 160, 161, 162, 164, 165, 166, 167, 170, 172 ], "all_flip_indices": [ 47, 24, 69, 92, 93, 94, 95, 99, 100, 101, 102, 105, 108, 109, 110, 123, 124, 129, 134, 135, 136, 138, 141, 142, 143, 145, 146, 153, 154, 158, 159, 160, 161, 162, 164, 165, 166, 167, 170, 172 ], "message_flip_count": 3, "parity_flip_count": 37, "total_flip_count": 40, "message_flip_cost": 0.429542, "parity_flip_cost": 33.702714, "total_reliability_cost": 34.132256, "closed_syndrome_weight": 999, "valid_codeword_hard_decision": true, "message91": "0000000100000001000001001100000000000010001000010000010000000000000000100000000101000100110", "message91_sha256_16": "937bbbe6622a93b8", "codeword174_sha256_16": "24013711efc6e35f" } ], "warning": "Syndrome closure can always form a codeword by parity repair; this is only a ranked candidate generator until JS8 message unpack/CRC validates a candidate." } } ], "decodes": [], "outputs": { "ldpc_soft_decode_json": "/decoders/js8_decoder/runtime/ldpc_soft_decode/step43_ldpc_soft_decode.json" }, "warnings": [ "Step 51 keeps the direct timing-sweep primary row first and adds a bounded syndrome-closure repair candidate generator ranked by LLR reliability cost.", "Step 51 syndrome-closure repair is diagnostic only: parity repair can force syndrome zero, so candidates still need JS8 message unpack/CRC validation before they count as real decodes.", "This still does not unpack JS8 text or validate CRC/message payloads.", "If soft success is true or a syndrome-closure candidate passes future JS8 message/CRC validation, the next step can unpack the 91-bit message. Otherwise continue timing/interleaver/LLR tuning." ], "next_action": "Inspect best_syndrome_closure_repair_probe.top_candidates. Next step should add bounded JS8 91-bit message unpack/CRC validation for the ranked candidate messages while keeping timing best row unchanged." } }, "ldpc_matrix_probe": { "name": "20260527T111109Z_ldpc_matrix_probe_output.json", "path": "/decoders/js8_decoder/logs/20260527T111109Z_ldpc_matrix_probe_output.json", "url": "/logs/20260527T111109Z_ldpc_matrix_probe_output.json", "stat": { "exists": true, "is_file": true, "is_dir": false, "size": 35253, "mtime_utc": "2026-05-27T11:11:11Z" }, "json_preview": { "ok": true, "mode": "JS8", "tool": "webftr-js8-real-ldpc-matrix-syndrome-probe", "tool_version": "step51-source-aligned-tone-offset-cli-fix", "input_wav": null, "candidate_json": "/decoders/js8_decoder/runtime/timing_boundary_sweep/step51_source_aligned_best_timing_fec_candidate.json", "rx_only": true, "safety": { "tx": false, "ptt": false, "tune": false, "send": false, "js8call_runtime_control": false }, "implementation_stage": "step43_bounded_gray_interleaver_matrix_ranking_no_message_unpack", "matrix": { "code": "(174,91) LDPC generator matrix", "generator_rows": 83, "generator_cols": 91, "message_bits": 91, "parity_bits": 83, "source_file": "ldpc_174_91_c_generator.f90" }, "bounds": { "total_transform_rows_before_limit": 865, "max_rows": 72, "repair_rows": 10, "max_flips": 6, "candidate_pool": 12 }, "candidate_context": { "nsps_used": 6192, "nsps_is_js8_realistic": true, "selected_profile": null, "selected_variant": { "name": "step43_timing_sweep_best_syndrome_row", "rank_score": 1105.166392, "complete_174bit_candidate": true, "hard_bits_sha256_16": "95a1e941fbdff6b2", "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 1.291598, "min_abs": 0.001433, "max_abs": 3.895705, "positive": 129, "negative": 45, "zero": 0 } } }, "variant_probe_count": 72, "best_matrix_probe": { "variant": "step43_timing_sweep_best_syndrome_row", "transform": "direct_timing_sweep_primary", "mapping_meta": { "direct_timing_sweep_primary": true, "source_mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "source_transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "source_variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver" }, "hard_weight_174": 36, "llr_avg_abs": 1001.2915982873564, "syndrome": { "bits_len": 174, "message91": "0000000100000001000001000100000000000010001000000000010000000000000001100000000101000100110", "parity83_observed": "00101000000010010001000000010000110101000000000011100101101000000000001001001000110", "parity83_expected": "10110000000000110101000000000011101111100000111011110101101001100000101001001100100", "syndrome83": "10011000000010100100000000010011011010100000111000010000000001100000100000000100010", "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "d4ca2a05f15dd009", "codeword174_sha256_16": "95a1e941fbdff6b2" }, "repair": { "attempted": true, "max_flips": 6, "candidate_pool": 12, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 22, "trace": [], "repaired_message91_sha256_16": "d4ca2a05f15dd009" } }, "all_matrix_probes": [ { "variant": "step43_timing_sweep_best_syndrome_row", "transform": "direct_timing_sweep_primary", "mapping_meta": { "direct_timing_sweep_primary": true, "source_mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "source_transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "source_variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver" }, "hard_weight_174": 36, "llr_avg_abs": 1001.2915982873564, "syndrome": { "bits_len": 174, "message91": "0000000100000001000001000100000000000010001000000000010000000000000001100000000101000100110", "parity83_observed": "00101000000010010001000000010000110101000000000011100101101000000000001001001000110", "parity83_expected": "10110000000000110101000000000011101111100000111011110101101001100000101001001100100", "syndrome83": "10011000000010100100000000010011011010100000111000010000000001100000100000000100010", "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "d4ca2a05f15dd009", "codeword174_sha256_16": "95a1e941fbdff6b2" }, "repair": { "attempted": true, "max_flips": 6, "candidate_pool": 12, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 22, "trace": [], "repaired_message91_sha256_16": "d4ca2a05f15dd009" } }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "hard_weight_174": 36, "llr_avg_abs": 1.2915982873563212, "syndrome": { "bits_len": 174, "message91": "0000000100000001000001000100000000000010001000000000010000000000000001100000000101000100110", "parity83_observed": "00101000000010010001000000010000110101000000000011100101101000000000001001001000110", "parity83_expected": "10110000000000110101000000000011101111100000111011110101101001100000101001001100100", "syndrome83": "10011000000010100100000000010011011010100000111000010000000001100000100000000100010", "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "d4ca2a05f15dd009", "codeword174_sha256_16": "95a1e941fbdff6b2" }, "repair": { "attempted": true, "max_flips": 6, "candidate_pool": 12, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 22, "trace": [], "repaired_message91_sha256_16": "d4ca2a05f15dd009" } }, { "variant": "step43_timing_sweep_best_syndrome_row", "transform": "raw_msb+no_interleaver", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none" }, "hard_weight_174": 36, "llr_avg_abs": 1.2915982873563212, "syndrome": { "bits_len": 174, "message91": "0000000100000001000001000100000000000010001000000000010000000000000001100000000101000100110", "parity83_observed": "00101000000010010001000000010000110101000000000011100101101000000000001001001000110", "parity83_expected": "10110000000000110101000000000011101111100000111011110101101001100000101001001100100", "syndrome83": "10011000000010100100000000010011011010100000111000010000000001100000100000000100010", "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "d4ca2a05f15dd009", "codeword174_sha256_16": "95a1e941fbdff6b2" }, "repair": { "attempted": true, "max_flips": 6, "candidate_pool": 12, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 22, "trace": [], "repaired_message91_sha256_16": "d4ca2a05f15dd009" } }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+no_interleaver", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "hard_weight_174": 36, "llr_avg_abs": 1.2893225114942535, "syndrome": { "bits_len": 174, "message91": "0000000100000001000001000100000000000010001000000000010000000000000001100000000101000100110", "parity83_observed": "00101000000010010001000000010000110101000000000011100101101000000000001001001000110", "parity83_expected": "10110000000000110101000000000011101111100000111011110101101001100000101001001100100", "syndrome83": "10011000000010100100000000010011011010100000111000010000000001100000100000000100010", "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "d4ca2a05f15dd009", "codeword174_sha256_16": "95a1e941fbdff6b2" }, "repair": { "attempted": true, "max_flips": 6, "candidate_pool": 12, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 22, "trace": [], "repaired_message91_sha256_16": "d4ca2a05f15dd009" } }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "hard_weight_174": 61, "llr_avg_abs": 1.1143301551724138, "syndrome": { "bits_len": 174, "message91": "1100001110000000010110010110001010001010000010000001110001100011100110110000001010000010110", "parity83_observed": "00110000000011000110011000000110100100001001000110001100110000000011110110000000011", "parity83_expected": "00111100101110110000011000110111100101001001000110100101100101001111011111100010011", "syndrome83": "00001100101101110110000000110001000001000000000000101001010101001100101001100010000", "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "bab866be6de1cc5a", "codeword174_sha256_16": "4b4b446b1e4f7aae" }, "repair": { "attempted": true, "max_flips": 6, "candidate_pool": 12, "flip_count": 1, "repair_success": false, "final_syndrome_weight": 26, "trace": [ { "flip_index": 165, "llr_abs": 0.041242, "gain": 1, "syndrome_weight_after": 26 } ], "repaired_message91_sha256_16": "bab866be6de1cc5a" } }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "hard_weight_174": 61, "llr_avg_abs": 1.0792917931034485, "syndrome": { "bits_len": 174, "message91": "1100001110000000010110010110001010001010000010000001110001100011100110110000001010000010110", "parity83_observed": "00110000000011000110011000000110100100001001000110001100110000000011110110000000011", "parity83_expected": "00111100101110110000011000110111100101001001000110100101100101001111011111100010011", "syndrome83": "00001100101101110110000000110001000001000000000000101001010101001100101001100010000", "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "bab866be6de1cc5a", "codeword174_sha256_16": "4b4b446b1e4f7aae" }, "repair": { "attempted": true, "max_flips": 6, "candidate_pool": 12, "flip_count": 1, "repair_success": false, "final_syndrome_weight": 26, "trace": [ { "flip_index": 165, "llr_abs": 0.003629, "gain": 1, "syndrome_weight_after": 26 } ], "repaired_message91_sha256_16": "bab866be6de1cc5a" } }, { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "hard_weight_174": 93, "llr_avg_abs": 1.818736224137931, "syndrome": { "bits_len": 174, "message91": "0011110111101100001011010010101110101000011100011010011111110101111100100101100100001011111", "parity83_observed": "00000111101100000100100110100110110100001011111101100100011010101010110111110010101", "parity83_expected": "00000011100100100100000110110101101100101111110011100101110010110000011100100111000", "syndrome83": "00000100001000100000100000010011011000100100001110000001101000011010101011010101101", "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "4439454e612f6636", "codeword174_sha256_16": "953e2bc596e8a67e" }, "repair": { "attempted": true, "max_flips": 6, "candidate_pool": 12, "flip_count": 3, "repair_success": false, "final_syndrome_weight": 26, "trace": [ { "flip_index": 155, "llr_abs": 0.01702, "gain": 1, "syndrome_weight_after": 28 }, { "flip_index": 149, "llr_abs": 0.031568, "gain": 1, "syndrome_weight_after": 27 }, { "flip_index": 170, "llr_abs": 0.066433, "gain": 1, "syndrome_weight_after": 26 } ], "repaired_message91_sha256_16": "4439454e612f6636" } }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "hard_weight_174": 45, "llr_avg_abs": 1.6256335402298847, "syndrome": { "bits_len": 174, "message91": "1100000100110000000101000100000100001110000000001001000010000000001110000010000100100110000", "parity83_observed": "00100000000001001000010000010000000011010110001101000000000001100001100000110011010", "parity83_expected": "11010000101000001010101011011001000100110100011000010001100001000101110001110011000", "syndrome83": "11110000101001000010111011001001000111100010010101010001100000100100010001000000010", "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "1bf4f3a7e6e5f651", "codeword174_sha256_16": "daeb23bbbdf896b0" }, "repair": { "attempted": true, "max_flips": 6, "candidate_pool": 12, "flip_count": 3, "repair_success": false, "final_syndrome_weight": 28, "trace": [ { "flip_index": 113, "llr_abs": 0.003629, "gain": 1, "syndrome_weight_after": 30 }, { "flip_index": 112, "llr_abs": 0.100589, "gain": 1, "syndrome_weight_after": 29 }, { "flip_index": 160, "llr_abs": 0.101553, "gain": 1, "syndrome_weight_after": 28 } ], "repaired_message91_sha256_16": "1bf4f3a7e6e5f651" } }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none" }, "hard_weight_174": 45, "llr_avg_abs": 1.6172086091954023, "syndrome": { "bits_len": 174, "message91": "0000000110000001100001100110000000010010001101100000010000000000000000110000000110000000110", "parity83_observed": "00010000000101000111000000000000110111000000000001110111001000000000001001011000011", "parity83_expected": "01001010101000000111001100000110100111100010000101110001101101110110111011100000011", "syndrome83": "01011010101101000000001100000110010000100010000100000110100101110110110010111000000", "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "202d2650a31499d7", "codeword174_sha256_16": "6c43e3bd22022c79" }, "repair": { "attempted": true, "max_flips": 6, "candidate_pool": 12, "flip_count": 3, "repair_success": false, "final_syndrome_weight": 28, "trace": [ { "flip_index": 167, "llr_abs": 0.001539, "gain": 1, "syndrome_weight_after": 30 }, { "flip_index": 166, "llr_abs": 0.029448, "gain": 1, "syndrome_weight_after": 29 }, { "flip_index": 124, "llr_abs": 0.064735, "gain": 1, "syndrome_weight_after": 28 } ], "repaired_message91_sha256_16": "202d2650a31499d7" } }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "hard_weight_174": 45, "llr_avg_abs": 1.6664229885057469, "syndrome": { "bits_len": 174, "message91": "1100000100110000000101000100000100001110000000001001000010000000001110000010000100100110000", "parity83_observed": "00100000000001001000010000010000000011010110001101000000000001100001100000110011010", "parity83_expected": "11010000101000001010101011011001000100110100011000010001100001000101110001110011000", "syndrome83": "11110000101001000010111011001001000111100010010101010001100000100100010001000000010", "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "1bf4f3a7e6e5f651", "codeword174_sha256_16": "daeb23bbbdf896b0" }, "repair": { "attempted": true, "max_flips": 6, "candidate_pool": 12, "flip_count": 2, "repair_success": false, "final_syndrome_weight": 29, "trace": [ { "flip_index": 113, "llr_abs": 0.041242, "gain": 1, "syndrome_weight_after": 30 }, { "flip_index": 112, "llr_abs": 0.103273, "gain": 1, "syndrome_weight_after": 29 } ], "repaired_message91_sha256_16": "1bf4f3a7e6e5f651" } }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none", "polarity": "inverted" }, "hard_weight_174": 127, "llr_avg_abs": 1.3337297126436785, "syndrome": { "bits_len": 174, "message91": "1111111001111111110011101101111000101111111000010011111111101110011001111111111011101111111", "parity83_observed": "11111001100111111110111111100001001100111100110111110111001111100001111110111111111", "parity83_expected": "10110001101001101110011110000001101010111101010101010001110111000111101100101000101", "syndrome83": "01001000001110010000100001100000100110000001100010100110111000100110010010010111010", "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "332fb0dabe874c89", "codeword174_sha256_16": "b69cc7a7a2c9cfc9" }, "repair": { "attempted": false, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 31, "trace": [], "repaired_message91_sha256_16": "332fb0dabe874c89" } }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none", "polarity": "inverted" }, "hard_weight_174": 127, "llr_avg_abs": 1.2983798793103447, "syndrome": { "bits_len": 174, "message91": "1111111001111111110011101101111000101111111000010011111111101110011001111111111011101111111", "parity83_observed": "11111001100111111110111111100001001100111100110111110111001111100001111110111111111", "parity83_expected": "10110001101001101110011110000001101010111101010101010001110111000111101100101000101", "syndrome83": "01001000001110010000100001100000100110000001100010100110111000100110010010010111010", "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "332fb0dabe874c89", "codeword174_sha256_16": "b69cc7a7a2c9cfc9" }, "repair": { "attempted": false, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 31, "trace": [], "repaired_message91_sha256_16": "332fb0dabe874c89" } }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_lsb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none", "polarity": "inverted" }, "hard_weight_174": 127, "llr_avg_abs": 1.2560504137931032, "syndrome": { "bits_len": 174, "message91": "1111111001111111110011101101111000101111111000010011111111101110011001111111111011101111111", "parity83_observed": "11111001100111111110111111100001001100111100110111110111001111100001111110111111111", "parity83_expected": "10110001101001101110011110000001101010111101010101010001110111000111101100101000101", "syndrome83": "01001000001110010000100001100000100110000001100010100110111000100110010010010111010", "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "332fb0dabe874c89", "codeword174_sha256_16": "b69cc7a7a2c9cfc9" }, "repair": { "attempted": false, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 31, "trace": [], "repaired_message91_sha256_16": "332fb0dabe874c89" } }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "hard_weight_174": 37, "llr_avg_abs": 1.2423823563218392, "syndrome": { "bits_len": 174, "message91": "0100010011001000000000000111000000100000000000010001110000000010000000100000000000011000010", "parity83_observed": "01000000000010010010000000100010000110100011000011001010000000000001000000011000001", "parity83_expected": "01001001001001100010101001101110001000001011100010111111100001000101001010000000000", "syndrome83": "00001001001011110000101001001100001110101000100001110101100001000100001010011000001", "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "24f38de55dffa50e", "codeword174_sha256_16": "a5cef5b3b7fef29e" }, "repair": { "attempted": false, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 31, "trace": [], "repaired_message91_sha256_16": "24f38de55dffa50e" } }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_lsb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none", "polarity": "inverted" }, "hard_weight_174": 127, "llr_avg_abs": 1.217521729885057, "syndrome": { "bits_len": 174, "message91": "1111111001111111110011101101111000101111111000010011111111101110011001111111111011101111111", "parity83_observed": "11111001100111111110111111100001001100111100110111110111001111100001111110111111111", "parity83_expected": "10110001101001101110011110000001101010111101010101010001110111000111101100101000101", "syndrome83": "01001000001110010000100001100000100110000001100010100110111000100110010010010111010", "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "332fb0dabe874c89", "codeword174_sha256_16": "b69cc7a7a2c9cfc9" }, "repair": { "attempted": false, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 31, "trace": [], "repaired_message91_sha256_16": "332fb0dabe874c89" } }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "hard_weight_174": 57, "llr_avg_abs": 1.208058896551724, "syndrome": { "bits_len": 174, "message91": "0010100010100001100000001000010000001000000010100010100000001111110000001001001011100101100", "parity83_observed": "00110000000100110100000010000100010000101101001010000101100110001000000100110111110", "parity83_expected": "01110111010100110100100110000000011111000100011001001110001010001011101100110010100", "syndrome83": "01000111010000000000100100000100001111101001010011001011101100000011101000000101010", "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "678915ad8b5b531e", "codeword174_sha256_16": "0bfb984669bc190f" }, "repair": { "attempted": false, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 31, "trace": [], "repaired_message91_sha256_16": "678915ad8b5b531e" } }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "hard_weight_174": 37, "llr_avg_abs": 1.2055921379310346, "syndrome": { "bits_len": 174, "message91": "0100010011001000000000000111000000100000000000010001110000000010000000100000000000011000010", "parity83_observed": "01000000000010010010000000100010000110100011000011001010000000000001000000011000001", "parity83_expected": "01001001001001100010101001101110001000001011100010111111100001000101001010000000000", "syndrome83": "00001001001011110000101001001100001110101000100001110101100001000100001010011000001", "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "24f38de55dffa50e", "codeword174_sha256_16": "a5cef5b3b7fef29e" }, "repair": { "attempted": false, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 31, "trace": [], "repaired_message91_sha256_16": "24f38de55dffa50e" } }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "hard_weight_174": 57, "llr_avg_abs": 1.1703414942528743, "syndrome": { "bits_len": 174, "message91": "0010100010100001100000001000010000001000000010100010100000001111110000001001001011100101100", "parity83_observed": "00110000000100110100000010000100010000101101001010000101100110001000000100110111110", "parity83_expected": "01110111010100110100100110000000011111000100011001001110001010001011101100110010100", "syndrome83": "01000111010000000000100100000100001111101001010011001011101100000011101000000101010", "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "678915ad8b5b531e", "codeword174_sha256_16": "0bfb984669bc190f" }, "repair": { "attempted": false, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 31, "trace": [], "repaired_message91_sha256_16": "678915ad8b5b531e" } }, { "variant": "lsb_within_each_tone", "transform": "raw_msb+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "hard_weight_174": 30, "llr_avg_abs": 2.2186752701149435, "syndrome": { "bits_len": 174, "message91": "0100000000000100011001000000000100000000000110000000001000000100000100010001001100000000001", "parity83_observed": "00001000000000010001100000010010001000010000000000110001010000100000000000000100000", "parity83_expected": "11010100100010100010111000111011101010000001011001100001100100010000100000001101000", "syndrome83": "11011100100010110011011000101001100010010001011001010000110100110000100000001001000", "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "770633de1c822554", "codeword174_sha256_16": "3605fe147cc4f9f8" }, "repair": { "attempted": false, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 32, "trace": [], "repaired_message91_sha256_16": "770633de1c822554" } }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "raw_msb+no_interleaver", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none" }, "hard_weight_174": 30, "llr_avg_abs": 2.2186752701149435, "syndrome": { "bits_len": 174, "message91": "0100000000000100011001000000000100000000000110000000001000000100000100010001001100000000001", "parity83_observed": "00001000000000010001100000010010001000010000000000110001010000100000000000000100000", "parity83_expected": "11010100100010100010111000111011101010000001011001100001100100010000100000001101000", "syndrome83": "11011100100010110011011000101001100010010001011001010000110100110000100000001001000", "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "770633de1c822554", "codeword174_sha256_16": "3605fe147cc4f9f8" }, "repair": { "attempted": false, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 32, "trace": [], "repaired_message91_sha256_16": "770633de1c822554" } } ], "decodes": [], "outputs": { "ldpc_matrix_probe_json": "/decoders/js8_decoder/runtime/ldpc_matrix_probe/step43_ldpc_matrix_probe.json" }, "warnings": [ "Step 51 preserves the exact timing-sweep primary row in matrix ranking, then repairs only a bounded subset to avoid Raspberry Pi timeouts.", "This is still a diagnostic LDPC/FEC probe and does not unpack JS8 text yet.", "If best_matrix_probe reaches syndrome_weight 0, the next step can feed message91 into CRC/message unpack. Otherwise continue timing, symbol boundary, deinterleaver/order or LLR tuning using best mapping_meta." ], "next_action": "Upload Step35 logs. Inspect best_matrix_probe.mapping_meta and final_syndrome_weight; then either unpack message91 on syndrome 0 or continue bounded LDPC/timing tuning." } }, "candidate_export": { "name": "20260527T110128Z_real_run_candidate_export_output.json", "path": "/decoders/js8_decoder/logs/20260527T110128Z_real_run_candidate_export_output.json", "url": "/logs/20260527T110128Z_real_run_candidate_export_output.json", "stat": { "exists": true, "is_file": true, "is_dir": false, "size": 99113, "mtime_utc": "2026-05-27T11:08:30Z" }, "json_preview": { "ok": true, "mode": "JS8", "tool": "webftr-js8-fec-candidate-export", "tool_version": "step51-source-aligned-tone-offset-cli-fix", "input_wav": "/decoders/js8_decoder/runtime/quick_prefilter_windows/js8_quick_selected_window.wav", "rx_only": true, "safety": { "tx": false, "ptt": false, "tune": false, "send": false, "js8call_runtime_control": false }, "implementation_stage": "step43_profile_anchor_candidate_export_no_message_unpack", "selected_profile": { "profile": "js8_near_6400", "nsps": 6400, "symbol_duration_seconds": 0.533333, "tone_spacing_hz": 1.875, "note": "0.533 s timing guard candidate", "ok": true, "sync": { "start_seconds": 4.8, "base_freq_hz": 1025.0, "candidate_score": 47.4, "costas_hits": 2, "avg_margin_db": 8.01, "candidate_count": 12 }, "frame": { "symbols_available_after_start": 103, "data_symbol_count_estimate": 58, "expected_data_symbols_candidate": 58 }, "fec": { "soft_bit_count_estimate": 174, "missing_soft_bits_estimate": 0, "complete_ldpc_input_candidate_estimate": true }, "rank_score": 225.085 }, "profile_selection_source": "profile_scan_json_anchor", "profile_scan_json": "/decoders/js8_decoder/logs/20260527T110128Z_real_run_profile_scan_output.json", "anchor_json": "/decoders/js8_decoder/logs/20260527T110128Z_real_run_auto_ldpc_probe_output.json", "anchor_selection": { "source": "profile_scan_json", "path": "/decoders/js8_decoder/logs/20260527T110128Z_real_run_profile_scan_output.json", "selection": "profile_scan_selected_profile", "nsps": 6400, "start_seconds": 4.8, "base_freq_hz": 1025.0, "tone_spacing_hz": 1.875 }, "anchor_attempts": [ { "source": "profile_scan_json", "path": "/decoders/js8_decoder/logs/20260527T110128Z_real_run_profile_scan_output.json", "selection": "profile_scan_selected_profile", "nsps": 6400, "start_seconds": 4.8, "base_freq_hz": 1025.0, "tone_spacing_hz": 1.875 } ], "anchor_expected_enabled": true, "prefer_js8_realistic_profile": true, "nsps_used": 6400, "nsps_is_js8_realistic": true, "wav": { "path": "/decoders/js8_decoder/runtime/quick_prefilter_windows/js8_quick_selected_window.wav", "channels": 1, "sample_rate": 12000, "sample_width_bytes": 2, "frames": 720000, "duration_seconds": 60.0, "rms_dbfs": -9.13, "peak_dbfs": -0.72, "clipped": false }, "sync_candidate": { "start_sample": 57600, "start_seconds": 4.8, "base_freq_hz": 1025.0, "tone_spacing_hz": 1.875, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "profile_scan_json" }, "frame_candidate": { "input_symbol_count": 96, "excluded_costas_symbol_count": 0, "detected_costas_blocks": [], "data_symbol_count_available": 96, "data_symbol_count_used": 58, "expected_data_symbols_candidate": 58, "costas_policy": "js8_leading_only" }, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "anchor_context": { "enabled": true, "source": "profile_scan_json", "start_seconds": 4.8, "base_freq_hz": 1025.0, "tone_spacing_hz": 1.875, "nsps": 6400, "symbol_count_extracted": 96 }, "variant_count": 23, "selected_variant": { "name": "raw_msb_symbol_order", "rank_score": 127.195892, "complete_174bit_candidate": true, "hard_bits_sha256_16": "c87312f86dbe74fc", "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 2.298973, "min_abs": 0.012672, "max_abs": 4.421458, "positive": 141, "negative": 33, "zero": 0 } }, "variants": [ { "name": "raw_msb_symbol_order", "description": "Current FEC bridge: Costas-stripped symbols, MSB-first tone bits.", "bit_count": 174, "llr_count": 174, "complete_174bit_candidate": true, "hard_bits_174": "000000000000000000010000010011000001000110101000011010000010010000001000000011011011000000000000000000000011000000001000010001001010001000010010000001010000010000001001000000", "hard_bits_sha256_16": "c87312f86dbe74fc", "hard_weight_174": 36, "llr_full_174": [ 4.145349, 4.116374, 3.511245, 4.180269, 4.169674, 4.14242, 4.168008, 4.153984, 4.12139, 4.168076, 4.135428, 4.11961, 4.07648, 4.076237, 4.08862, 2.756476, 2.742424, 3.003457, 2.955568, -1.875523, 1.978199, 2.658519, 0.652185, 1.080854, 3.045159, -2.198749, 1.333744, 0.789541, 0.471669, -0.473047, 2.454295, 1.837215, 1.942431, 3.352145, 2.163158, -2.926977, 3.300296, 1.818615, 2.678266, 0.27805, -1.765651, 0.507303, 0.384955, 0.866369, -0.118003, 3.200765, 2.063815, 1.87262, 1.0381, -1.355162, -1.599648, 3.332469, -2.249717, 1.748972, 3.56793, 3.262649, 3.617447, 2.319559, -1.211827, 1.719706, 3.019019, -3.210486, 3.575036, 2.726546, 0.281133, 1.361861, 0.844266, 0.012672, -0.477879, 2.427052, 0.927501, 2.023583, 1.640172, 0.441842, 1.473774, 0.724531, -1.103418, -1.264035, 0.966046, -0.916188, -0.820746, 2.920695, -1.395798, -1.732909, 4.123045, 3.154533, 1.694026, 4.167475, 4.14333, 4.094062, 4.166411, 4.137106, 4.073255, 4.16641, 4.1509, 4.091336, 4.16914, 4.045318, 3.8423, 4.098287, 3.599922, 1.677122, 3.447718, 0.044719, 2.01941, 3.666068, -1.085865, -1.807547, 2.689748, 0.585744, 2.065345, 3.083072, 2.617179, 1.346997, 2.548193, 2.264806, -0.571842, 2.351419, 1.247615, 1.499097, 3.383096, -3.47555, 3.593033, 0.355702, 2.45095, -3.635826, 2.165497, 2.132701, -2.226011, 2.192378, -1.921746, 1.999342, 3.137893, 2.980057, -2.621792, 3.666644, 0.533081, 1.582817, 3.285701, -3.283029, 3.223063, 2.568732, -0.251398, 0.268492, 1.534973, 1.692448, 1.48451, 3.152828, 0.300403, -0.280146, 1.052121, -0.948727, 1.008293, 0.777135, 0.891886, 0.17487, 2.402306, -2.356355, 2.750596, 1.575325, 0.833633, 2.006609, 1.914037, 2.633553, -1.988459, 1.730599, 1.570304, -1.598288, 4.421458, 0.617935, 1.642426, 3.964669, 3.566732, 3.449224 ], "llr_stats": { "count": 174, "avg_abs": 2.298973, "min_abs": 0.012672, "max_abs": 4.421458, "positive": 141, "negative": 33, "zero": 0 }, "rank_score": 127.195892 }, { "name": "lsb_within_each_tone", "description": "Same symbols, but each 3-bit tone value reversed for bit-order comparison.", "bit_count": 174, "llr_count": 174, "complete_174bit_candidate": true, "hard_bits_174": "000000000000000000010000010110000100000011101000110010000010010000100000000110110110000000000000000000000110000000100000010100100010100000010010000100010000010000100100000000", "hard_bits_sha256_16": "1caf67e82a3cc0f1", "hard_weight_174": 36, "llr_full_174": [ 4.145349, 4.116374, 3.511245, 4.180269, 4.169674, 4.14242, 4.168008, 4.153984, 4.12139, 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"000000000000000000011000011101000110000010111000101011000011011000110000000101101101000000000000000000000101000000110000011110110011110000011011000110011000011000110110000000", "hard_bits_sha256_16": "59ffe501f1e043cb", "hard_weight_174": 56, "llr_full_174": [ 3.511245, 3.076058, 3.437868, 4.14242, 3.463052, 3.482047, 4.12139, 3.444662, 3.468067, 4.11961, 3.4346, 3.458719, 4.08862, 3.389547, 3.383499, 3.003457, 2.174491, 2.060361, 1.978199, -1.253376, -1.591113, 1.080854, 0.31333, 0.56185, 1.333744, -1.011161, -1.847073, -0.473047, -0.107643, 0.174324, 1.942431, 1.217867, 1.419337, -2.926977, -1.786838, 1.901332, 2.678266, 1.476712, 1.619799, 0.507303, -0.355267, -0.196181, -0.118003, -0.048096, 0.155455, 1.87262, 1.289837, 1.790739, -1.599648, 0.827582, -0.578368, 1.748972, -1.29335, -1.961803, 3.617447, 2.732275, 2.711617, 1.719706, -0.79266, -0.955261, 3.575036, -2.684222, -2.418998, 1.361861, 0.165756, 0.246221, -0.477879, -0.002971, 0.005053, 2.023583, 0.690148, 0.760335, 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0.602345, 3.449224, 2.814003, 3.053424 ], "llr_stats": { "count": 174, "avg_abs": 1.700431, "min_abs": 0.002971, "max_abs": 4.14242, "positive": 118, "negative": 56, "zero": 0 }, "rank_score": 106.801724 }, { "name": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "description": "Step 51 mapped LDPC candidate: {'tone_mapping': 'ft8_gray_alt_high', 'gray_direction': 'inverse_observed_to_plain', 'reverse_bits_within_tone_before_gray': True, 'interleaver': 'ft8_bitrev', 'direction': 'deinterleave_rx_to_codeword', 'order_len': 174}", "bit_count": 174, "llr_count": 174, "complete_174bit_candidate": true, "hard_bits_174": "001100100001101000100100001101000000100000100110001100111101100000010000000001010011000010000000000011010001001000000001000111000001001000011111000010000110111000101001001001", "hard_bits_sha256_16": "ff8640fb5870e924", "hard_weight_174": 56, "llr_full_174": [ 3.511245, 4.094062, 0.155455, -1.370996, 0.31333, 0.448774, -0.477879, 0.17487, 3.458719, 3.412437, 2.732275, -0.033375, -2.926977, 3.593033, -0.352049, 1.527821, 4.12139, 4.091336, -0.578368, 0.505329, -0.107643, -0.459934, 1.473774, 2.006609, 2.060361, 0.04196, -2.684222, -0.0415, 0.507303, -2.226011, 0.899911, 0.410424, 4.14242, 4.073255, 1.790739, 2.364918, -1.011161, 1.118333, 2.023583, 2.750596, 3.383499, 3.125681, -0.79266, 0.930803, 2.678266, -3.635826, -0.389375, 0.990283, 4.11961, 3.8423, -1.961803, -2.59262, 1.217867, 0.73449, -1.264035, -1.988459, -1.591113, -1.021437, 0.165756, -0.417069, -0.118003, 1.999342, 1.4931, 2.814003, 3.437868, 3.462428, 1.289837, -2.095502, 1.333744, 1.346997, 0.005053, 0.312353, 3.389547, 1.545767, 1.719706, 1.48451, 1.901332, -2.736158, 0.336351, -0.932253, 3.468067, 3.465722, -1.29335, -2.560943, 1.942431, 1.499097, 0.29567, 0.530183, -1.253376, 0.743729, 1.361861, 1.008293, -0.196181, 1.469319, 1.694026, 3.449224, 3.482047, 3.458752, 0.827582, 0.346751, -0.473047, -0.571842, 0.760335, -1.69446, 2.174491, 0.034236, 3.575036, -0.280146, 1.619799, 0.298316, -1.732909, 1.642426, 3.4346, 3.245894, 3.617447, 0.268492, 1.419337, 0.988211, 0.576942, -1.576503, 1.080854, 2.065345, 0.246221, -0.432768, -0.048096, -1.28627, 2.833396, 3.053424, 3.076058, 3.42551, 1.87262, -2.621792, 0.56185, 0.507762, -0.002971, 0.07304, 4.08862, 1.677122, 2.711617, -0.215309, -1.786838, -2.840271, -0.820746, -1.598288, 3.444662, 3.427791, 1.748972, 3.223063, 0.174324, 1.711438, 0.274437, 0.620799, 1.978199, -1.807547, -2.418998, 0.275455, -0.355267, -1.497835, -1.212139, 0.602345, 3.463052, 3.411796, -1.599648, 1.582817, -1.847073, 2.133428, 0.690148, -1.847061, 3.003457, 2.01941, -0.955261, 0.95636, 1.476712, -2.186416 ], "llr_stats": { "count": 174, "avg_abs": 1.700431, "min_abs": 0.002971, "max_abs": 4.14242, "positive": 118, "negative": 56, "zero": 0 }, "rank_score": 106.801724 }, { "name": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "description": "Step 51 mapped LDPC candidate: {'tone_mapping': 'ft8_gray_alt_high', 'gray_direction': 'inverse_observed_to_plain', 'reverse_bits_within_tone_before_gray': True, 'interleaver': 'ft8_bitrev', 'direction': 'interleave_codeword_to_rx_inverse', 'order_len': 174}", "bit_count": 174, "llr_count": 174, "complete_174bit_candidate": true, "hard_bits_174": "000000001100001000100001000011010010100000010111100001100010010011000010000000110001011000100001000000011000101001000010001000110100110101110101110110011000000010000100000001", "hard_bits_sha256_16": "bfb5977abc51e8a1", "hard_weight_174": 56, "llr_full_174": [ 3.511245, 1.469319, 0.165756, 1.419337, 0.620799, 3.8423, 2.174491, 1.48451, -0.389375, -1.599648, 1.118333, 3.468067, 0.346751, 1.473774, -0.355267, 1.642426, 0.04196, 1.333744, -0.432768, 3.42551, 2.711617, 3.593033, 3.463052, -2.621792, 0.005053, 2.678266, 1.527821, 1.545767, -1.591113, -0.0415, 1.694026, -1.29335, 1.711438, 4.08862, -2.59262, 0.576942, 0.155455, 2.814003, 2.065345, -0.107643, 2.750596, 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-1.212139, 1.748972, -0.459934, 3.458719, -2.560943, -1.264035, -0.048096, 3.449224, -1.021437, -0.473047, 0.312353, 3.411796, -0.955261, -3.635826, 3.444662, 1.582817, 0.760335, 0.507303, 0.990283, 0.034236, 0.56185, -0.417069, 4.094062, 2.732275, 0.988211, 3.003457, -0.215309, 0.336351, 1.790739, 1.346997, 1.217867, 2.006609, 3.465722, 1.361861, -1.497835 ], "llr_stats": { "count": 174, "avg_abs": 1.700431, "min_abs": 0.002971, "max_abs": 4.14242, "positive": 118, "negative": 56, "zero": 0 }, "rank_score": 106.801724 }, { "name": "lab_mask_xor_preview", "description": "Deterministic lab-only XOR mask preview; not the real JS8 whitening polynomial.", "bit_count": 174, "llr_count": 174, "complete_174bit_candidate": true, "hard_bits_174": "100000110011010100101001101000010001101100010110111111000100101000110111100010101100100101100100100000010010001100011111000111111010010001111000011101101101111000011100011111", "hard_bits_sha256_16": "b1bb86c852f0f4ca", "hard_weight_174": 85, "llr_full_174": [ 4.145349, 4.116374, 3.511245, 4.180269, 4.169674, 4.14242, 4.168008, 4.153984, 4.12139, 4.168076, 4.135428, 4.11961, 4.07648, 4.076237, 4.08862, 2.756476, 2.742424, 3.003457, 2.955568, -1.875523, 1.978199, 2.658519, 0.652185, 1.080854, 3.045159, -2.198749, 1.333744, 0.789541, 0.471669, -0.473047, 2.454295, 1.837215, 1.942431, 3.352145, 2.163158, -2.926977, 3.300296, 1.818615, 2.678266, 0.27805, -1.765651, 0.507303, 0.384955, 0.866369, -0.118003, 3.200765, 2.063815, 1.87262, 1.0381, -1.355162, -1.599648, 3.332469, -2.249717, 1.748972, 3.56793, 3.262649, 3.617447, 2.319559, -1.211827, 1.719706, 3.019019, -3.210486, 3.575036, 2.726546, 0.281133, 1.361861, 0.844266, 0.012672, -0.477879, 2.427052, 0.927501, 2.023583, 1.640172, 0.441842, 1.473774, 0.724531, -1.103418, -1.264035, 0.966046, -0.916188, -0.820746, 2.920695, -1.395798, -1.732909, 4.123045, 3.154533, 1.694026, 4.167475, 4.14333, 4.094062, 4.166411, 4.137106, 4.073255, 4.16641, 4.1509, 4.091336, 4.16914, 4.045318, 3.8423, 4.098287, 3.599922, 1.677122, 3.447718, 0.044719, 2.01941, 3.666068, -1.085865, -1.807547, 2.689748, 0.585744, 2.065345, 3.083072, 2.617179, 1.346997, 2.548193, 2.264806, -0.571842, 2.351419, 1.247615, 1.499097, 3.383096, -3.47555, 3.593033, 0.355702, 2.45095, -3.635826, 2.165497, 2.132701, -2.226011, 2.192378, -1.921746, 1.999342, 3.137893, 2.980057, -2.621792, 3.666644, 0.533081, 1.582817, 3.285701, -3.283029, 3.223063, 2.568732, -0.251398, 0.268492, 1.534973, 1.692448, 1.48451, 3.152828, 0.300403, -0.280146, 1.052121, -0.948727, 1.008293, 0.777135, 0.891886, 0.17487, 2.402306, -2.356355, 2.750596, 1.575325, 0.833633, 2.006609, 1.914037, 2.633553, -1.988459, 1.730599, 1.570304, -1.598288, 4.421458, 0.617935, 1.642426, 3.964669, 3.566732, 3.449224 ], "llr_stats": { "count": 174, "avg_abs": 2.298973, "min_abs": 0.012672, "max_abs": 4.421458, "positive": 141, "negative": 33, "zero": 0 }, "rank_score": 101.195892 } ], "outputs": { "candidate_json": "/decoders/js8_decoder/runtime/fec_candidates/js8_quick_selected_window_fec_candidate_step17.json", "selected_bits_file": "/decoders/js8_decoder/runtime/fec_candidates/js8_quick_selected_window_fec_candidate_step17.bits" }, "decodes": [], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation.", "Step 51 locks candidate export to JS8-realistic timing and reuses the selected profile sync anchor for FEC symbol extraction where available.", "It still does not perform real LDPC/FEC decode or message unpack.", "Next step can tune real JS8/FT8 LDPC matrix/deinterleaver/message unpack against this anchored candidate contract." ], "next_action": "Run collect-logs and upload the JS8Lab bundle. If selected_variant.complete_174bit_candidate is true, proceed to LDPC/deinterleaver/message-unpack tuning." } }, "timing_boundary_sweep": { "name": "20260527T110128Z_real_run_timing_boundary_sweep_output.json", "path": "/decoders/js8_decoder/logs/20260527T110128Z_real_run_timing_boundary_sweep_output.json", "url": "/logs/20260527T110128Z_real_run_timing_boundary_sweep_output.json", "stat": { "exists": true, "is_file": true, "is_dir": false, "size": 145265, "mtime_utc": "2026-05-27T11:11:09Z" }, "json_preview": { "ok": true, "mode": "JS8", "tool": "webftr-js8-timing-boundary-candidate-sweep", "tool_version": "step51-source-aligned-tone-offset-cli-fix", "input_wav": "/decoders/js8_decoder/runtime/quick_prefilter_windows/js8_quick_selected_window.wav", "profile_scan_json": "/decoders/js8_decoder/logs/20260527T110128Z_real_run_profile_scan_output.json", "anchor_json": "/decoders/js8_decoder/logs/20260527T110128Z_real_run_auto_ldpc_probe_output.json", "rx_only": true, "safety": { "tx": false, "ptt": false, "tune": false, "send": false, "js8call_runtime_control": false }, "implementation_stage": "step51_source_aligned_timing_boundary_syndrome_sweep_no_message_unpack", "anchor_selection": { "source": "profile_scan_json", "path": "/decoders/js8_decoder/logs/20260527T110128Z_real_run_profile_scan_output.json", "selection": "profile_scan_selected_profile", "nsps": 6400, "start_seconds": 4.8, "base_freq_hz": 1025.0, "tone_spacing_hz": 1.875 }, "partial": false, "partial_reason": "complete", "sweep_elapsed_seconds": 158.007, "source_alignment": { "source_nsps": 6192, "source_tone_spacing_hz": 1.937984496124031, "effective_nsps": 6192, "effective_tone_spacing_base_hz": 1.937984496124031 }, "sweep_grid": { "start_offsets_s": [ 0.0, 0.03, 0.06, 0.09, 0.12 ], "base_freq_offsets_hz": [ 1.5, 2.0, 2.5, 3.0, 3.5 ], "tone_spacing_offsets_hz": [ -0.03, 0.0, 0.03 ], "max_combinations": 45, "actual_combinations": 45, "processed_combinations": 45, "time_budget_seconds": 210.0 }, "decode_found": false, "best_final_syndrome_weight": 22, "best_candidate": { "combination_index": 11, "offsets": { "start_offset_s": 0.0, "base_freq_offset_hz": 3.0, "tone_spacing_offset_hz": -0.03 }, "anchor_applied": { "start_seconds": 4.8, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 57600, "start_seconds": 4.8, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:11" }, "best_row": { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 1.291598, "min_abs": 0.001433, "max_abs": 3.895705, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 105.166392, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "d4ca2a05f15dd009", "codeword174_sha256_16": "95a1e941fbdff6b2" }, "top_rows": [ { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 1.291598, "min_abs": 0.001433, "max_abs": 3.895705, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 105.166392, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "d4ca2a05f15dd009", "codeword174_sha256_16": "95a1e941fbdff6b2" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+no_interleaver", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 1.289323, "min_abs": 0.000933, "max_abs": 3.895705, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 105.157292, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "d4ca2a05f15dd009", "codeword174_sha256_16": "95a1e941fbdff6b2" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 61, "llr_stats": { "count": 174, "avg_abs": 1.11433, "min_abs": 0.000187, "max_abs": 3.795489, "positive": 110, "negative": 64, "zero": 0 }, "source_rank_score": 104.45732, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "bab866be6de1cc5a", "codeword174_sha256_16": "4b4b446b1e4f7aae" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 61, "llr_stats": { "count": 174, "avg_abs": 1.079292, "min_abs": 0.000226, "max_abs": 3.795489, "positive": 110, "negative": 64, "zero": 0 }, "source_rank_score": 104.317168, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "bab866be6de1cc5a", "codeword174_sha256_16": "4b4b446b1e4f7aae" }, { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 93, "llr_stats": { "count": 174, "avg_abs": 1.818736, "min_abs": 0.003108, "max_abs": 4.379379, "positive": 34, "negative": 140, "zero": 0 }, "source_rank_score": 99.274944, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "4439454e612f6636", "codeword174_sha256_16": "953e2bc596e8a67e" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 45, "llr_stats": { "count": 174, "avg_abs": 1.666423, "min_abs": 0.002022, "max_abs": 3.950111, "positive": 124, "negative": 50, "zero": 0 }, "source_rank_score": 106.665692, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "1bf4f3a7e6e5f651", "codeword174_sha256_16": "daeb23bbbdf896b0" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 45, "llr_stats": { "count": 174, "avg_abs": 1.625634, "min_abs": 0.003108, "max_abs": 3.895705, "positive": 124, "negative": 50, "zero": 0 }, "source_rank_score": 106.502536, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "1bf4f3a7e6e5f651", "codeword174_sha256_16": "daeb23bbbdf896b0" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 45, "llr_stats": { "count": 174, "avg_abs": 1.617209, "min_abs": 0.001539, "max_abs": 3.944456, "positive": 123, "negative": 51, "zero": 0 }, "source_rank_score": 106.468836, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "202d2650a31499d7", "codeword174_sha256_16": "6c43e3bd22022c79" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, "top_candidates": [ { "combination_index": 11, "offsets": { "start_offset_s": 0.0, "base_freq_offset_hz": 3.0, "tone_spacing_offset_hz": -0.03 }, "anchor_applied": { "start_seconds": 4.8, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 57600, "start_seconds": 4.8, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:11" }, "best_row": { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 1.291598, "min_abs": 0.001433, "max_abs": 3.895705, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 105.166392, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "d4ca2a05f15dd009", "codeword174_sha256_16": "95a1e941fbdff6b2" }, "top_rows": [ { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 1.291598, "min_abs": 0.001433, "max_abs": 3.895705, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 105.166392, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "d4ca2a05f15dd009", "codeword174_sha256_16": "95a1e941fbdff6b2" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+no_interleaver", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 1.289323, "min_abs": 0.000933, "max_abs": 3.895705, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 105.157292, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "d4ca2a05f15dd009", "codeword174_sha256_16": "95a1e941fbdff6b2" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 61, "llr_stats": { "count": 174, "avg_abs": 1.11433, "min_abs": 0.000187, "max_abs": 3.795489, "positive": 110, "negative": 64, "zero": 0 }, "source_rank_score": 104.45732, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "bab866be6de1cc5a", "codeword174_sha256_16": "4b4b446b1e4f7aae" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 61, "llr_stats": { "count": 174, "avg_abs": 1.079292, "min_abs": 0.000226, "max_abs": 3.795489, "positive": 110, "negative": 64, "zero": 0 }, "source_rank_score": 104.317168, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "bab866be6de1cc5a", "codeword174_sha256_16": "4b4b446b1e4f7aae" }, { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 93, "llr_stats": { "count": 174, "avg_abs": 1.818736, "min_abs": 0.003108, "max_abs": 4.379379, "positive": 34, "negative": 140, "zero": 0 }, "source_rank_score": 99.274944, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "4439454e612f6636", "codeword174_sha256_16": "953e2bc596e8a67e" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 45, "llr_stats": { "count": 174, "avg_abs": 1.666423, "min_abs": 0.002022, "max_abs": 3.950111, "positive": 124, "negative": 50, "zero": 0 }, "source_rank_score": 106.665692, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "1bf4f3a7e6e5f651", "codeword174_sha256_16": "daeb23bbbdf896b0" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 45, "llr_stats": { "count": 174, "avg_abs": 1.625634, "min_abs": 0.003108, "max_abs": 3.895705, "positive": 124, "negative": 50, "zero": 0 }, "source_rank_score": 106.502536, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "1bf4f3a7e6e5f651", "codeword174_sha256_16": "daeb23bbbdf896b0" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 45, "llr_stats": { "count": 174, "avg_abs": 1.617209, "min_abs": 0.001539, "max_abs": 3.944456, "positive": 123, "negative": 51, "zero": 0 }, "source_rank_score": 106.468836, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "202d2650a31499d7", "codeword174_sha256_16": "6c43e3bd22022c79" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 2, "offsets": { "start_offset_s": 0.0, "base_freq_offset_hz": 1.5, "tone_spacing_offset_hz": -0.03 }, "anchor_applied": { "start_seconds": 4.8, "base_freq_hz": 1026.5, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 57600, "start_seconds": 4.8, "base_freq_hz": 1026.5, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:2" }, "best_row": { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 127, "llr_stats": { "count": 174, "avg_abs": 1.733511, "min_abs": 0.012055, "max_abs": 4.121456, "positive": 45, "negative": 129, "zero": 0 }, "source_rank_score": 106.934044, "syndrome_weight": 23, "valid_codeword_hard_decision": false, "message91_sha256_16": "392cab12a34759b9", "codeword174_sha256_16": "5e40b5a83c672886" }, "top_rows": [ { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 127, "llr_stats": { "count": 174, "avg_abs": 1.733511, "min_abs": 0.012055, "max_abs": 4.121456, "positive": 45, "negative": 129, "zero": 0 }, "source_rank_score": 106.934044, "syndrome_weight": 23, "valid_codeword_hard_decision": false, "message91_sha256_16": "392cab12a34759b9", "codeword174_sha256_16": "5e40b5a83c672886" }, { "variant": "reverse_symbol_order", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 44, "llr_stats": { "count": 174, "avg_abs": 1.881544, "min_abs": 0.008612, "max_abs": 4.094064, "positive": 115, "negative": 59, "zero": 0 }, "source_rank_score": 111.526176, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "128117b042d0d534", "codeword174_sha256_16": "b0809bdee52aa2eb" }, { "variant": "reverse_full_bitstream", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 44, "llr_stats": { "count": 174, "avg_abs": 2.029253, "min_abs": 0.008612, "max_abs": 4.159387, "positive": 134, "negative": 40, "zero": 0 }, "source_rank_score": 111.117012, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "128117b042d0d534", "codeword174_sha256_16": "b0809bdee52aa2eb" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 113, "llr_stats": { "count": 174, "avg_abs": 1.409152, "min_abs": 0.001536, "max_abs": 4.121456, "positive": 53, "negative": 121, "zero": 0 }, "source_rank_score": 105.636608, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "a7ec7573558f6d66", "codeword174_sha256_16": "fd238f7999c92f54" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 97, "llr_stats": { "count": 174, "avg_abs": 1.258287, "min_abs": 0.00739, "max_abs": 4.094064, "positive": 73, "negative": 101, "zero": 0 }, "source_rank_score": 105.033148, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "10a0624085517fbb", "codeword174_sha256_16": "2e36371617234c9c" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 1.691846, "min_abs": 3.9e-05, "max_abs": 4.159387, "positive": 139, "negative": 35, "zero": 0 }, "source_rank_score": 106.767384, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "fa72b5aad0016ab4", "codeword174_sha256_16": "9a4cfc262b798d41" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 44, "llr_stats": { "count": 174, "avg_abs": 1.342044, "min_abs": 3.9e-05, "max_abs": 3.408185, "positive": 130, "negative": 44, "zero": 0 }, "source_rank_score": 105.368176, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "ff6f9fd31170e8ba", "codeword174_sha256_16": "1740cb3878bab5bf" }, { "variant": "raw_msb_symbol_order", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 109, "llr_stats": { "count": 174, "avg_abs": 1.807528, "min_abs": 0.007795, "max_abs": 4.094064, "positive": 65, "negative": 109, "zero": 0 }, "source_rank_score": 125.230112, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "07b13c8ed6906112", "codeword174_sha256_16": "00e44a669eea08bb" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 1, "offsets": { "start_offset_s": 0.0, "base_freq_offset_hz": 1.5, "tone_spacing_offset_hz": 0.0 }, "anchor_applied": { "start_seconds": 4.8, "base_freq_hz": 1026.5, "tone_spacing_hz": 1.937984496124031, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 57600, "start_seconds": 4.8, "base_freq_hz": 1026.5, "tone_spacing_hz": 1.937984496124031, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:1" }, "best_row": { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 123, "llr_stats": { "count": 174, "avg_abs": 1.615244, "min_abs": 0.009081, "max_abs": 4.107793, "positive": 49, "negative": 125, "zero": 0 }, "source_rank_score": 106.460976, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "392cab12a34759b9", "codeword174_sha256_16": "5ae8d6b48d414f34" }, "top_rows": [ { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 123, "llr_stats": { "count": 174, "avg_abs": 1.615244, "min_abs": 0.009081, "max_abs": 4.107793, "positive": 49, "negative": 125, "zero": 0 }, "source_rank_score": 106.460976, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "392cab12a34759b9", "codeword174_sha256_16": "5ae8d6b48d414f34" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 95, "llr_stats": { "count": 174, "avg_abs": 1.197035, "min_abs": 0.00517, "max_abs": 3.968945, "positive": 71, "negative": 103, "zero": 0 }, "source_rank_score": 104.78814, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "92b10effeeeb19a8", "codeword174_sha256_16": "1c65597835257916" }, { "variant": "reverse_symbol_order", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 43, "llr_stats": { "count": 174, "avg_abs": 1.775836, "min_abs": 0.021293, "max_abs": 4.112074, "positive": 117, "negative": 57, "zero": 0 }, "source_rank_score": 111.103344, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "c94e2d2f80c7bd08", "codeword174_sha256_16": "746597535b28b3a5" }, { "variant": "reverse_full_bitstream", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 43, "llr_stats": { "count": 174, "avg_abs": 1.924785, "min_abs": 0.021293, "max_abs": 4.127648, "positive": 135, "negative": 39, "zero": 0 }, "source_rank_score": 110.69914, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "c94e2d2f80c7bd08", "codeword174_sha256_16": "746597535b28b3a5" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "raw_msb+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 43, "llr_stats": { "count": 174, "avg_abs": 1.924785, "min_abs": 0.021293, "max_abs": 4.127648, "positive": 135, "negative": 39, "zero": 0 }, "source_rank_score": 107.69914, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "9a11ea1dd34fbb3d", "codeword174_sha256_16": "66658ed247b41bb0" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 108, "llr_stats": { "count": 174, "avg_abs": 1.69607, "min_abs": 0.003643, "max_abs": 4.112074, "positive": 65, "negative": 109, "zero": 0 }, "source_rank_score": 106.78428, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "842583d1534d7dbc", "codeword174_sha256_16": "74a25cd15e35b3d5" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 108, "llr_stats": { "count": 174, "avg_abs": 1.69607, "min_abs": 0.003643, "max_abs": 4.112074, "positive": 65, "negative": 109, "zero": 0 }, "source_rank_score": 106.78428, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "62e51936630c641e", "codeword174_sha256_16": "c52150be96d8413f" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 110, "llr_stats": { "count": 174, "avg_abs": 1.276774, "min_abs": 0.005048, "max_abs": 4.107793, "positive": 53, "negative": 121, "zero": 0 }, "source_rank_score": 105.107096, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "effdee3cae80cf8e", "codeword174_sha256_16": "1bb03d72bab96f47" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 43, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 3.5, "tone_spacing_offset_hz": 0.0 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1028.5, "tone_spacing_hz": 1.937984496124031, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 58320, "start_seconds": 4.86, "base_freq_hz": 1028.5, "tone_spacing_hz": 1.937984496124031, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:43" }, "best_row": { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 49, "llr_stats": { "count": 174, "avg_abs": 1.230206, "min_abs": 0.003136, "max_abs": 3.713292, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 104.920824, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "e20eaf42c9d5a080", "codeword174_sha256_16": "670a833d4cd80958" }, "top_rows": [ { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 49, "llr_stats": { "count": 174, "avg_abs": 1.230206, "min_abs": 0.003136, "max_abs": 3.713292, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 104.920824, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "e20eaf42c9d5a080", "codeword174_sha256_16": "670a833d4cd80958" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 57, "llr_stats": { "count": 174, "avg_abs": 1.180522, "min_abs": 7.3e-05, "max_abs": 4.114918, "positive": 116, "negative": 58, "zero": 0 }, "source_rank_score": 104.722088, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "08c336f0fdbd0b9d", "codeword174_sha256_16": "828c7698f0f759d6" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 113, "llr_stats": { "count": 174, "avg_abs": 1.000414, "min_abs": 0.000314, "max_abs": 3.722453, "positive": 61, "negative": 113, "zero": 0 }, "source_rank_score": 104.001656, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "e9dab226fae4b28e", "codeword174_sha256_16": "6dde07ebf7b5f589" }, { "variant": "lab_mask_xor_preview", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 93, "llr_stats": { "count": 174, "avg_abs": 2.092034, "min_abs": 0.019209, "max_abs": 4.114918, "positive": 138, "negative": 36, "zero": 0 }, "source_rank_score": 100.368136, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "2cd135c17dd2b470", "codeword174_sha256_16": "fc7ab1ab87744044" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_lsb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 120, "llr_stats": { "count": 174, "avg_abs": 1.221856, "min_abs": 1.9e-05, "max_abs": 4.114918, "positive": 52, "negative": 122, "zero": 0 }, "source_rank_score": 104.887424, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "dccfb96fe1c80677", "codeword174_sha256_16": "29a87a46c7d870ae" }, { "variant": "reverse_full_bitstream", "transform": "ft8_gray_alt_high_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 35, "llr_stats": { "count": 174, "avg_abs": 1.753358, "min_abs": 0.003136, "max_abs": 4.114918, "positive": 138, "negative": 36, "zero": 0 }, "source_rank_score": 110.013432, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "510b5025f519b4a7", "codeword174_sha256_16": "d5e243f42868b95b" }, { "variant": "reverse_symbol_order", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 35, "llr_stats": { "count": 174, "avg_abs": 1.451951, "min_abs": 0.003136, "max_abs": 3.728632, "positive": 120, "negative": 54, "zero": 0 }, "source_rank_score": 109.807804, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "510b5025f519b4a7", "codeword174_sha256_16": "d5e243f42868b95b" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 47, "llr_stats": { "count": 174, "avg_abs": 1.057476, "min_abs": 2.3e-05, "max_abs": 3.114307, "positive": 128, "negative": 46, "zero": 0 }, "source_rank_score": 104.229904, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "4781b790b251315c", "codeword174_sha256_16": "777c0990b801d669" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 21, "offsets": { "start_offset_s": 0.03, "base_freq_offset_hz": 2.0, "tone_spacing_offset_hz": 0.03 }, "anchor_applied": { "start_seconds": 4.83, "base_freq_hz": 1027.0, "tone_spacing_hz": 1.967984496124031, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 57960, "start_seconds": 4.83, "base_freq_hz": 1027.0, "tone_spacing_hz": 1.967984496124031, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:21" }, "best_row": { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 103, "llr_stats": { "count": 174, "avg_abs": 1.014755, "min_abs": 0.001418, "max_abs": 3.82154, "positive": 71, "negative": 103, "zero": 0 }, "source_rank_score": 104.05902, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "f6f9e2c65d361950", "codeword174_sha256_16": "a34f30514f1147be" }, "top_rows": [ { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 103, "llr_stats": { "count": 174, "avg_abs": 1.014755, "min_abs": 0.001418, "max_abs": 3.82154, "positive": 71, "negative": 103, "zero": 0 }, "source_rank_score": 104.05902, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "f6f9e2c65d361950", "codeword174_sha256_16": "a34f30514f1147be" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 134, "llr_stats": { "count": 174, "avg_abs": 1.51667, "min_abs": 1.8e-05, "max_abs": 4.144111, "positive": 40, "negative": 134, "zero": 0 }, "source_rank_score": 106.06668, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "daab820710a9a228", "codeword174_sha256_16": "16654f047cae3428" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 45, "llr_stats": { "count": 174, "avg_abs": 1.128579, "min_abs": 1.8e-05, "max_abs": 3.363492, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 104.514316, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "d40791f46d2a4b11", "codeword174_sha256_16": "9dca28554c5a2316" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_msb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 58, "llr_stats": { "count": 174, "avg_abs": 1.225323, "min_abs": 0.002329, "max_abs": 3.956982, "positive": 126, "negative": 48, "zero": 0 }, "source_rank_score": 104.901292, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "a7c653e33db6db7c", "codeword174_sha256_16": "04e767b23e20bf0a" }, { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 34, "llr_stats": { "count": 174, "avg_abs": 2.163748, "min_abs": 0.014686, "max_abs": 4.144111, "positive": 141, "negative": 33, "zero": 0 }, "source_rank_score": 108.654992, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "cc61e58f86747a77", "codeword174_sha256_16": "71bebbfd08ed2f9a" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 122, "llr_stats": { "count": 174, "avg_abs": 1.636108, "min_abs": 0.015006, "max_abs": 3.82154, "positive": 49, "negative": 125, "zero": 0 }, "source_rank_score": 106.544432, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "f6de0dff4166858e", "codeword174_sha256_16": "a8a90b25176d03db" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 108, "llr_stats": { "count": 174, "avg_abs": 1.159192, "min_abs": 0.003014, "max_abs": 3.956982, "positive": 60, "negative": 114, "zero": 0 }, "source_rank_score": 104.636768, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "14fd4623952966b5", "codeword174_sha256_16": "fafeccfe3224ee30" }, { "variant": "raw_msb_symbol_order", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 49, "llr_stats": { "count": 174, "avg_abs": 1.750816, "min_abs": 0.003492, "max_abs": 4.144111, "positive": 127, "negative": 47, "zero": 0 }, "source_rank_score": 125.003264, "syndrome_weight": 33, "valid_codeword_hard_decision": false, "message91_sha256_16": "766a43ca41ee0172", "codeword174_sha256_16": "7d9bcf61433ea9fd" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 39, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 2.5, "tone_spacing_offset_hz": 0.03 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1027.5, "tone_spacing_hz": 1.967984496124031, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 58320, "start_seconds": 4.86, "base_freq_hz": 1027.5, "tone_spacing_hz": 1.967984496124031, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:39" }, "best_row": { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 126, "llr_stats": { "count": 174, "avg_abs": 1.636445, "min_abs": 0.04144, "max_abs": 4.144109, "positive": 48, "negative": 126, "zero": 0 }, "source_rank_score": 106.54578, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "25788c17f810b7d5", "codeword174_sha256_16": "87afe3fe5c58aa69" }, "top_rows": [ { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 126, "llr_stats": { "count": 174, "avg_abs": 1.636445, "min_abs": 0.04144, "max_abs": 4.144109, "positive": 48, "negative": 126, "zero": 0 }, "source_rank_score": 106.54578, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "25788c17f810b7d5", "codeword174_sha256_16": "87afe3fe5c58aa69" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 43, "llr_stats": { "count": 174, "avg_abs": 1.29064, "min_abs": 0.002158, "max_abs": 4.085972, "positive": 136, "negative": 38, "zero": 0 }, "source_rank_score": 105.16256, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "d7fbffc39612c219", "codeword174_sha256_16": "b1faca9af1fcf29e" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 140, "llr_stats": { "count": 174, "avg_abs": 2.221352, "min_abs": 0.057726, "max_abs": 4.144109, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 108.885408, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "0329e23109e06988", "codeword174_sha256_16": "cb10f2e95870a14d" }, { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 126, "llr_stats": { "count": 174, "avg_abs": 1.549534, "min_abs": 0.04144, "max_abs": 4.085972, "positive": 48, "negative": 126, "zero": 0 }, "source_rank_score": 106.198136, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "c203e9dd4e290c80", "codeword174_sha256_16": "93022f63b6f5a179" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 45, "llr_stats": { "count": 174, "avg_abs": 1.647117, "min_abs": 0.014093, "max_abs": 4.109742, "positive": 133, "negative": 41, "zero": 0 }, "source_rank_score": 106.588468, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "ce0c8b98f36c5477", "codeword174_sha256_16": "0686743576218a8e" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 57, "llr_stats": { "count": 174, "avg_abs": 1.600836, "min_abs": 0.007559, "max_abs": 3.884246, "positive": 120, "negative": 54, "zero": 0 }, "source_rank_score": 106.403344, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "bccfcf3a9d2d88f9", "codeword174_sha256_16": "789a455223ead9d0" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 55, "llr_stats": { "count": 174, "avg_abs": 1.201724, "min_abs": 4.7e-05, "max_abs": 3.041852, "positive": 120, "negative": 54, "zero": 0 }, "source_rank_score": 104.806896, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "1ba13df646b9fda8", "codeword174_sha256_16": "e6afe9485a3d19c5" }, { "variant": "raw_msb_symbol_order", "transform": "lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 140, "llr_stats": { "count": 174, "avg_abs": 2.221352, "min_abs": 0.057726, "max_abs": 4.144109, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 126.885408, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "064d4295f7c48336", "codeword174_sha256_16": "4b1f5a7ddad8966d" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 8, "offsets": { "start_offset_s": 0.0, "base_freq_offset_hz": 2.5, "tone_spacing_offset_hz": -0.03 }, "anchor_applied": { "start_seconds": 4.8, "base_freq_hz": 1027.5, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 57600, "start_seconds": 4.8, "base_freq_hz": 1027.5, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:8" }, "best_row": { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 56, "llr_stats": { "count": 174, "avg_abs": 1.265569, "min_abs": 0.007883, "max_abs": 4.01973, "positive": 124, "negative": 50, "zero": 0 }, "source_rank_score": 105.062276, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "6548c013cab69e1e", "codeword174_sha256_16": "e4a052902783f611" }, "top_rows": [ { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 56, "llr_stats": { "count": 174, "avg_abs": 1.265569, "min_abs": 0.007883, "max_abs": 4.01973, "positive": 124, "negative": 50, "zero": 0 }, "source_rank_score": 105.062276, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "6548c013cab69e1e", "codeword174_sha256_16": "e4a052902783f611" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 135, "llr_stats": { "count": 174, "avg_abs": 1.595277, "min_abs": 0.001058, "max_abs": 4.048874, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 106.381108, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "9e57d9fb308e6dee", "codeword174_sha256_16": "cc67285942c115ea" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 142, "llr_stats": { "count": 174, "avg_abs": 1.609719, "min_abs": 0.001956, "max_abs": 4.292074, "positive": 27, "negative": 147, "zero": 0 }, "source_rank_score": 106.438876, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "6b3d67c760fd57be", "codeword174_sha256_16": "732f86ed92cad209" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 135, "llr_stats": { "count": 174, "avg_abs": 1.595277, "min_abs": 0.001058, "max_abs": 4.048874, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 106.381108, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "c481def080ab9cb5", "codeword174_sha256_16": "47ebcc4bfd1fb637" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+no_interleaver", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 38, "llr_stats": { "count": 174, "avg_abs": 1.887501, "min_abs": 0.018857, "max_abs": 4.292074, "positive": 143, "negative": 31, "zero": 0 }, "source_rank_score": 107.550004, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "937823f97ed0847f", "codeword174_sha256_16": "9e5b66bac1556b29" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 138, "llr_stats": { "count": 174, "avg_abs": 1.609717, "min_abs": 0.003224, "max_abs": 4.292074, "positive": 31, "negative": 143, "zero": 0 }, "source_rank_score": 106.438868, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "46cc6ddc9712ac68", "codeword174_sha256_16": "4235701b167d47ee" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 138, "llr_stats": { "count": 174, "avg_abs": 1.585003, "min_abs": 8.3e-05, "max_abs": 4.292074, "positive": 33, "negative": 141, "zero": 0 }, "source_rank_score": 106.340012, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "46cc6ddc9712ac68", "codeword174_sha256_16": "4235701b167d47ee" }, { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 90, "llr_stats": { "count": 174, "avg_abs": 1.644885, "min_abs": 0.001088, "max_abs": 4.048874, "positive": 40, "negative": 134, "zero": 0 }, "source_rank_score": 98.57954, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "2a5e5b0263df5195", "codeword174_sha256_16": "4f91b6dc101564e5" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 41, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 3.0, "tone_spacing_offset_hz": -0.03 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 58320, "start_seconds": 4.86, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:41" }, "best_row": { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 54, "llr_stats": { "count": 174, "avg_abs": 1.071337, "min_abs": 0.008389, "max_abs": 4.378399, "positive": 115, "negative": 59, "zero": 0 }, "source_rank_score": 104.285348, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "7db4ad98fe1e49ac", "codeword174_sha256_16": "7761891a2eaf0907" }, "top_rows": [ { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 54, "llr_stats": { "count": 174, "avg_abs": 1.071337, "min_abs": 0.008389, "max_abs": 4.378399, "positive": 115, "negative": 59, "zero": 0 }, "source_rank_score": 104.285348, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "7db4ad98fe1e49ac", "codeword174_sha256_16": "7761891a2eaf0907" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 54, "llr_stats": { "count": 174, "avg_abs": 1.152765, "min_abs": 0.002806, "max_abs": 4.378399, "positive": 124, "negative": 50, "zero": 0 }, "source_rank_score": 104.61106, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "7db4ad98fe1e49ac", "codeword174_sha256_16": "e0bef0ec308e802c" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 59, "llr_stats": { "count": 174, "avg_abs": 0.944583, "min_abs": 0.000269, "max_abs": 3.784521, "positive": 114, "negative": 60, "zero": 0 }, "source_rank_score": 103.778332, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "9f88e54e8b6a8ee7", "codeword174_sha256_16": "d7384dff1531e25f" }, { "variant": "lab_mask_xor_preview", "transform": "lsb_within_each_tone+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 85, "llr_stats": { "count": 174, "avg_abs": 2.042063, "min_abs": 0.027988, "max_abs": 4.378399, "positive": 41, "negative": 133, "zero": 0 }, "source_rank_score": 100.168252, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "b66ebffa64074608", "codeword174_sha256_16": "43e29a9a3cd43903" }, { "variant": "reverse_symbol_order", "transform": "raw_msb+no_interleaver", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 42, "llr_stats": { "count": 174, "avg_abs": 2.042063, "min_abs": 0.027988, "max_abs": 4.378399, "positive": 133, "negative": 41, "zero": 0 }, "source_rank_score": 112.168252, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "632654c49dc26f7e", "codeword174_sha256_16": "35185e117fcf4f1a" }, { "variant": "reverse_full_bitstream", "transform": "lsb_within_each_tone+no_interleaver", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 42, "llr_stats": { "count": 174, "avg_abs": 2.042063, "min_abs": 0.027988, "max_abs": 4.378399, "positive": 133, "negative": 41, "zero": 0 }, "source_rank_score": 111.168252, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "632654c49dc26f7e", "codeword174_sha256_16": "35185e117fcf4f1a" }, { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 84, "llr_stats": { "count": 174, "avg_abs": 1.413691, "min_abs": 0.000298, "max_abs": 3.784521, "positive": 119, "negative": 55, "zero": 0 }, "source_rank_score": 97.654764, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "02e61e7bdafc459a", "codeword174_sha256_16": "54ce9719c19c39cc" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "raw_msb+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 133, "llr_stats": { "count": 174, "avg_abs": 1.682332, "min_abs": 0.011206, "max_abs": 4.378399, "positive": 41, "negative": 133, "zero": 0 }, "source_rank_score": 106.729328, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "39a87ca136a11c0a", "codeword174_sha256_16": "f1661db6a28115ad" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 14, "offsets": { "start_offset_s": 0.0, "base_freq_offset_hz": 3.5, "tone_spacing_offset_hz": -0.03 }, "anchor_applied": { "start_seconds": 4.8, "base_freq_hz": 1028.5, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 57600, "start_seconds": 4.8, "base_freq_hz": 1028.5, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:14" }, "best_row": { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 84, "llr_stats": { "count": 174, "avg_abs": 1.811424, "min_abs": 0.004549, "max_abs": 4.160775, "positive": 28, "negative": 146, "zero": 0 }, "source_rank_score": 99.245696, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "6d4c90342d0cd9cf", "codeword174_sha256_16": "fcc1684905e18849" }, "top_rows": [ { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 84, "llr_stats": { "count": 174, "avg_abs": 1.811424, "min_abs": 0.004549, "max_abs": 4.160775, "positive": 28, "negative": 146, "zero": 0 }, "source_rank_score": 99.245696, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "6d4c90342d0cd9cf", "codeword174_sha256_16": "fcc1684905e18849" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 46, "llr_stats": { "count": 174, "avg_abs": 1.577969, "min_abs": 0.032989, "max_abs": 4.160775, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 106.311876, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "0d245b70feba1bf6", "codeword174_sha256_16": "f1b0e4aa08c03e19" }, { "variant": "raw_msb_symbol_order", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 129, "llr_stats": { "count": 174, "avg_abs": 1.528267, "min_abs": 0.00871, "max_abs": 3.91927, "positive": 45, "negative": 129, "zero": 0 }, "source_rank_score": 124.113068, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "a1a97b2eec802f24", "codeword174_sha256_16": "5836d586f9603ce6" }, { "variant": "raw_msb_symbol_order", "transform": "ft8_gray_alt_high_demap_lsb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 129, "llr_stats": { "count": 174, "avg_abs": 1.485923, "min_abs": 0.004549, "max_abs": 3.91927, "positive": 44, "negative": 130, "zero": 0 }, "source_rank_score": 123.943692, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "a1a97b2eec802f24", "codeword174_sha256_16": "5836d586f9603ce6" }, { "variant": "lsb_within_each_tone", "transform": "ft8_gray_primary_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 129, "llr_stats": { "count": 174, "avg_abs": 1.853768, "min_abs": 0.00871, "max_abs": 4.160775, "positive": 29, "negative": 145, "zero": 0 }, "source_rank_score": 117.415072, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "a1a97b2eec802f24", "codeword174_sha256_16": "5836d586f9603ce6" }, { "variant": "lsb_within_each_tone", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 129, "llr_stats": { "count": 174, "avg_abs": 1.811424, "min_abs": 0.004549, "max_abs": 4.160775, "positive": 28, "negative": 146, "zero": 0 }, "source_rank_score": 117.245696, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "a1a97b2eec802f24", "codeword174_sha256_16": "5836d586f9603ce6" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 129, "llr_stats": { "count": 174, "avg_abs": 1.528267, "min_abs": 0.00871, "max_abs": 3.91927, "positive": 45, "negative": 129, "zero": 0 }, "source_rank_score": 106.113068, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "a1a97b2eec802f24", "codeword174_sha256_16": "5836d586f9603ce6" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "raw_msb+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 129, "llr_stats": { "count": 174, "avg_abs": 1.528267, "min_abs": 0.00871, "max_abs": 3.91927, "positive": 45, "negative": 129, "zero": 0 }, "source_rank_score": 106.113068, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "a1a97b2eec802f24", "codeword174_sha256_16": "5836d586f9603ce6" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 37, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 2.5, "tone_spacing_offset_hz": 0.0 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1027.5, "tone_spacing_hz": 1.937984496124031, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 58320, "start_seconds": 4.86, "base_freq_hz": 1027.5, "tone_spacing_hz": 1.937984496124031, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:37" }, "best_row": { "variant": "mapped_raw_msb+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 33, "llr_stats": { "count": 174, "avg_abs": 2.228872, "min_abs": 0.041868, "max_abs": 4.18324, "positive": 141, "negative": 33, "zero": 0 }, "source_rank_score": 108.915488, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "0259bb98617eb22e", "codeword174_sha256_16": "6c1338e037549e54" }, "top_rows": [ { "variant": "mapped_raw_msb+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 33, "llr_stats": { "count": 174, "avg_abs": 2.228872, "min_abs": 0.041868, "max_abs": 4.18324, "positive": 141, "negative": 33, "zero": 0 }, "source_rank_score": 108.915488, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "0259bb98617eb22e", "codeword174_sha256_16": "6c1338e037549e54" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 120, "llr_stats": { "count": 174, "avg_abs": 1.206909, "min_abs": 9.8e-05, "max_abs": 3.852127, "positive": 54, "negative": 120, "zero": 0 }, "source_rank_score": 104.827636, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "8f42609d6f1fc182", "codeword174_sha256_16": "45fb5a75f115763f" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 120, "llr_stats": { "count": 174, "avg_abs": 1.189499, "min_abs": 0.000127, "max_abs": 3.852127, "positive": 50, "negative": 124, "zero": 0 }, "source_rank_score": 104.757996, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "8f42609d6f1fc182", "codeword174_sha256_16": "45fb5a75f115763f" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 45, "llr_stats": { "count": 174, "avg_abs": 1.624396, "min_abs": 0.028992, "max_abs": 4.045437, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 106.497584, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "6f3b78f2a0789ec1", "codeword174_sha256_16": "10fa5f26d7f3c832" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 125, "llr_stats": { "count": 174, "avg_abs": 1.365276, "min_abs": 0.001421, "max_abs": 4.076297, "positive": 44, "negative": 130, "zero": 0 }, "source_rank_score": 105.461104, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "50ee3ebb2853f49e", "codeword174_sha256_16": "d12d6e7fd563854d" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 125, "llr_stats": { "count": 174, "avg_abs": 1.324012, "min_abs": 0.005023, "max_abs": 4.076297, "positive": 49, "negative": 125, "zero": 0 }, "source_rank_score": 105.296048, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "50ee3ebb2853f49e", "codeword174_sha256_16": "d12d6e7fd563854d" }, { "variant": "mapped_raw_msb+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 126, "llr_stats": { "count": 174, "avg_abs": 1.718599, "min_abs": 0.017042, "max_abs": 4.076297, "positive": 47, "negative": 127, "zero": 0 }, "source_rank_score": 106.874396, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "765c4ebc3707fdb0", "codeword174_sha256_16": "1fe0c66a7e9cf192" }, { "variant": "mapped_raw_msb+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 48, "llr_stats": { "count": 174, "avg_abs": 1.674076, "min_abs": 0.017042, "max_abs": 4.18324, "positive": 127, "negative": 47, "zero": 0 }, "source_rank_score": 106.696304, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "6057dbf97536ae1a", "codeword174_sha256_16": "0cbeded997791328" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 6, "offsets": { "start_offset_s": 0.0, "base_freq_offset_hz": 2.0, "tone_spacing_offset_hz": 0.03 }, "anchor_applied": { "start_seconds": 4.8, "base_freq_hz": 1027.0, "tone_spacing_hz": 1.967984496124031, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 57600, "start_seconds": 4.8, "base_freq_hz": 1027.0, "tone_spacing_hz": 1.967984496124031, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:6" }, "best_row": { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 41, "llr_stats": { "count": 174, "avg_abs": 1.742956, "min_abs": 0.016767, "max_abs": 4.307136, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 106.971824, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "04a04a473d9f4b8a", "codeword174_sha256_16": "bb9158f6426e5474" }, "top_rows": [ { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 41, "llr_stats": { "count": 174, "avg_abs": 1.742956, "min_abs": 0.016767, "max_abs": 4.307136, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 106.971824, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "04a04a473d9f4b8a", "codeword174_sha256_16": "bb9158f6426e5474" }, { "variant": "reverse_symbol_order", "transform": "raw_msb+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 142, "llr_stats": { "count": 174, "avg_abs": 2.244529, "min_abs": 0.061415, "max_abs": 4.307136, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 112.978116, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "4f116d0d2d97efad", "codeword174_sha256_16": "1ee0e2fbd4d51be6" }, { "variant": "reverse_full_bitstream", "transform": "lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 142, "llr_stats": { "count": 174, "avg_abs": 2.244529, "min_abs": 0.061415, "max_abs": 4.307136, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 111.978116, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "4f116d0d2d97efad", "codeword174_sha256_16": "1ee0e2fbd4d51be6" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 37, "llr_stats": { "count": 174, "avg_abs": 1.902489, "min_abs": 0.041499, "max_abs": 4.063879, "positive": 137, "negative": 37, "zero": 0 }, "source_rank_score": 107.609956, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "5e2bcbbdc8cb3e2a", "codeword174_sha256_16": "ac458b913c953919" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 137, "llr_stats": { "count": 174, "avg_abs": 1.902489, "min_abs": 0.041499, "max_abs": 4.063879, "positive": 37, "negative": 137, "zero": 0 }, "source_rank_score": 107.609956, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "5d363667677b4ebf", "codeword174_sha256_16": "5f395d3ae3d410f8" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 117, "llr_stats": { "count": 174, "avg_abs": 1.217101, "min_abs": 0.010473, "max_abs": 4.109301, "positive": 55, "negative": 119, "zero": 0 }, "source_rank_score": 104.868404, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "00e0e71440a516c6", "codeword174_sha256_16": "6f3fc74324df2743" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 119, "llr_stats": { "count": 174, "avg_abs": 1.165809, "min_abs": 0.003322, "max_abs": 4.109301, "positive": 58, "negative": 116, "zero": 0 }, "source_rank_score": 104.663236, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "aca78234d03d9e6e", "codeword174_sha256_16": "545b323981ac1f0b" }, { "variant": "raw_msb_symbol_order", "transform": "lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 142, "llr_stats": { "count": 174, "avg_abs": 2.244529, "min_abs": 0.061415, "max_abs": 4.307136, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 126.978116, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "56db10214087a30c", "codeword174_sha256_16": "04161507fe78a98a" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 26, "offsets": { "start_offset_s": 0.03, "base_freq_offset_hz": 3.0, "tone_spacing_offset_hz": -0.03 }, "anchor_applied": { "start_seconds": 4.83, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 57960, "start_seconds": 4.83, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:26" }, "best_row": { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 37, "llr_stats": { "count": 174, "avg_abs": 1.730043, "min_abs": 0.021616, "max_abs": 4.058353, "positive": 138, "negative": 36, "zero": 0 }, "source_rank_score": 106.920172, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "b85913e71a6e72e1", "codeword174_sha256_16": "e86c99d44140da4f" }, "top_rows": [ { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 37, "llr_stats": { "count": 174, "avg_abs": 1.730043, "min_abs": 0.021616, "max_abs": 4.058353, "positive": 138, "negative": 36, "zero": 0 }, "source_rank_score": 106.920172, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "b85913e71a6e72e1", "codeword174_sha256_16": "e86c99d44140da4f" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 109, "llr_stats": { "count": 174, "avg_abs": 0.947826, "min_abs": 0.000717, "max_abs": 3.411851, "positive": 68, "negative": 106, "zero": 0 }, "source_rank_score": 103.791304, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "63d7de999dc28356", "codeword174_sha256_16": "2ad9b1a14cd85e5c" }, { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 89, "llr_stats": { "count": 174, "avg_abs": 1.857069, "min_abs": 0.01092, "max_abs": 4.006713, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 99.428276, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "f3209b00dbbed253", "codeword174_sha256_16": "135a8970b67957e7" }, { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 81, "llr_stats": { "count": 174, "avg_abs": 1.51869, "min_abs": 0.01092, "max_abs": 3.732172, "positive": 123, "negative": 51, "zero": 0 }, "source_rank_score": 98.07476, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "4dc8b43767d57817", "codeword174_sha256_16": "78617f41a52a8853" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 130, "llr_stats": { "count": 174, "avg_abs": 1.736354, "min_abs": 0.024218, "max_abs": 4.151228, "positive": 45, "negative": 129, "zero": 0 }, "source_rank_score": 106.945416, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "b514dccc3f8f2f30", "codeword174_sha256_16": "e7b301d31e50e275" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 130, "llr_stats": { "count": 174, "avg_abs": 1.686625, "min_abs": 0.011664, "max_abs": 4.151228, "positive": 46, "negative": 128, "zero": 0 }, "source_rank_score": 106.7465, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "b514dccc3f8f2f30", "codeword174_sha256_16": "e7b301d31e50e275" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 126, "llr_stats": { "count": 174, "avg_abs": 1.567434, "min_abs": 0.000989, "max_abs": 3.732172, "positive": 51, "negative": 123, "zero": 0 }, "source_rank_score": 106.269736, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "810a0472f0698b8d", "codeword174_sha256_16": "4316a723d47fd8eb" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 129, "llr_stats": { "count": 174, "avg_abs": 1.34105, "min_abs": 0.01092, "max_abs": 4.006713, "positive": 42, "negative": 132, "zero": 0 }, "source_rank_score": 105.3642, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "9b97c830c0ad11f6", "codeword174_sha256_16": "06400af302ea8869" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] } ], "outputs": { "timing_boundary_sweep_json": "/decoders/js8_decoder/runtime/timing_boundary_sweep/step51_source_aligned_timing_boundary_sweep.json", "timing_best_candidate_json": "/decoders/js8_decoder/runtime/timing_boundary_sweep/step51_source_aligned_best_timing_fec_candidate.json", "checkpoint_json": "/decoders/js8_decoder/logs/20260527T110128Z_real_run_timing_boundary_sweep_output.json" }, "decodes": [], "warnings": [ "Step 51 expands the Step36 edge hit and exports the best timing candidate for downstream LDPC soft-decode.", "No JS8 text unpack or CRC validation is performed yet.", "No valid LDPC codeword found is a diagnostic warning, not a hard command failure." ], "next_action": "Use outputs.timing_best_candidate_json for LDPC matrix/soft decode. If syndrome is still far from 0, continue interleaver/LLR and symbol-boundary tuning around the best_candidate." } }, "real_run_timing_boundary_sweep": { "name": "20260527T110128Z_real_run_timing_boundary_sweep_output.json", "path": "/decoders/js8_decoder/logs/20260527T110128Z_real_run_timing_boundary_sweep_output.json", "url": "/logs/20260527T110128Z_real_run_timing_boundary_sweep_output.json", "stat": { "exists": true, "is_file": true, "is_dir": false, "size": 145265, "mtime_utc": "2026-05-27T11:11:09Z" }, "json_preview": { "ok": true, "mode": "JS8", "tool": "webftr-js8-timing-boundary-candidate-sweep", "tool_version": "step51-source-aligned-tone-offset-cli-fix", "input_wav": "/decoders/js8_decoder/runtime/quick_prefilter_windows/js8_quick_selected_window.wav", "profile_scan_json": "/decoders/js8_decoder/logs/20260527T110128Z_real_run_profile_scan_output.json", "anchor_json": "/decoders/js8_decoder/logs/20260527T110128Z_real_run_auto_ldpc_probe_output.json", "rx_only": true, "safety": { "tx": false, "ptt": false, "tune": false, "send": false, "js8call_runtime_control": false }, "implementation_stage": "step51_source_aligned_timing_boundary_syndrome_sweep_no_message_unpack", "anchor_selection": { "source": "profile_scan_json", "path": "/decoders/js8_decoder/logs/20260527T110128Z_real_run_profile_scan_output.json", "selection": "profile_scan_selected_profile", "nsps": 6400, "start_seconds": 4.8, "base_freq_hz": 1025.0, "tone_spacing_hz": 1.875 }, "partial": false, "partial_reason": "complete", "sweep_elapsed_seconds": 158.007, "source_alignment": { "source_nsps": 6192, "source_tone_spacing_hz": 1.937984496124031, "effective_nsps": 6192, "effective_tone_spacing_base_hz": 1.937984496124031 }, "sweep_grid": { "start_offsets_s": [ 0.0, 0.03, 0.06, 0.09, 0.12 ], "base_freq_offsets_hz": [ 1.5, 2.0, 2.5, 3.0, 3.5 ], "tone_spacing_offsets_hz": [ -0.03, 0.0, 0.03 ], "max_combinations": 45, "actual_combinations": 45, "processed_combinations": 45, "time_budget_seconds": 210.0 }, "decode_found": false, "best_final_syndrome_weight": 22, "best_candidate": { "combination_index": 11, "offsets": { "start_offset_s": 0.0, "base_freq_offset_hz": 3.0, "tone_spacing_offset_hz": -0.03 }, "anchor_applied": { "start_seconds": 4.8, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 57600, "start_seconds": 4.8, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:11" }, "best_row": { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 1.291598, "min_abs": 0.001433, "max_abs": 3.895705, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 105.166392, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "d4ca2a05f15dd009", "codeword174_sha256_16": "95a1e941fbdff6b2" }, "top_rows": [ { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 1.291598, "min_abs": 0.001433, "max_abs": 3.895705, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 105.166392, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "d4ca2a05f15dd009", "codeword174_sha256_16": "95a1e941fbdff6b2" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+no_interleaver", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 1.289323, "min_abs": 0.000933, "max_abs": 3.895705, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 105.157292, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "d4ca2a05f15dd009", "codeword174_sha256_16": "95a1e941fbdff6b2" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 61, "llr_stats": { "count": 174, "avg_abs": 1.11433, "min_abs": 0.000187, "max_abs": 3.795489, "positive": 110, "negative": 64, "zero": 0 }, "source_rank_score": 104.45732, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "bab866be6de1cc5a", "codeword174_sha256_16": "4b4b446b1e4f7aae" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 61, "llr_stats": { "count": 174, "avg_abs": 1.079292, "min_abs": 0.000226, "max_abs": 3.795489, "positive": 110, "negative": 64, "zero": 0 }, "source_rank_score": 104.317168, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "bab866be6de1cc5a", "codeword174_sha256_16": "4b4b446b1e4f7aae" }, { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 93, "llr_stats": { "count": 174, "avg_abs": 1.818736, "min_abs": 0.003108, "max_abs": 4.379379, "positive": 34, "negative": 140, "zero": 0 }, "source_rank_score": 99.274944, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "4439454e612f6636", "codeword174_sha256_16": "953e2bc596e8a67e" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 45, "llr_stats": { "count": 174, "avg_abs": 1.666423, "min_abs": 0.002022, "max_abs": 3.950111, "positive": 124, "negative": 50, "zero": 0 }, "source_rank_score": 106.665692, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "1bf4f3a7e6e5f651", "codeword174_sha256_16": "daeb23bbbdf896b0" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 45, "llr_stats": { "count": 174, "avg_abs": 1.625634, "min_abs": 0.003108, "max_abs": 3.895705, "positive": 124, "negative": 50, "zero": 0 }, "source_rank_score": 106.502536, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "1bf4f3a7e6e5f651", "codeword174_sha256_16": "daeb23bbbdf896b0" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 45, "llr_stats": { "count": 174, "avg_abs": 1.617209, "min_abs": 0.001539, "max_abs": 3.944456, "positive": 123, "negative": 51, "zero": 0 }, "source_rank_score": 106.468836, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "202d2650a31499d7", "codeword174_sha256_16": "6c43e3bd22022c79" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, "top_candidates": [ { "combination_index": 11, "offsets": { "start_offset_s": 0.0, "base_freq_offset_hz": 3.0, "tone_spacing_offset_hz": -0.03 }, "anchor_applied": { "start_seconds": 4.8, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 57600, "start_seconds": 4.8, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:11" }, "best_row": { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 1.291598, "min_abs": 0.001433, "max_abs": 3.895705, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 105.166392, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "d4ca2a05f15dd009", "codeword174_sha256_16": "95a1e941fbdff6b2" }, "top_rows": [ { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 1.291598, "min_abs": 0.001433, "max_abs": 3.895705, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 105.166392, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "d4ca2a05f15dd009", "codeword174_sha256_16": "95a1e941fbdff6b2" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+no_interleaver", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 1.289323, "min_abs": 0.000933, "max_abs": 3.895705, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 105.157292, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "d4ca2a05f15dd009", "codeword174_sha256_16": "95a1e941fbdff6b2" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 61, "llr_stats": { "count": 174, "avg_abs": 1.11433, "min_abs": 0.000187, "max_abs": 3.795489, "positive": 110, "negative": 64, "zero": 0 }, "source_rank_score": 104.45732, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "bab866be6de1cc5a", "codeword174_sha256_16": "4b4b446b1e4f7aae" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 61, "llr_stats": { "count": 174, "avg_abs": 1.079292, "min_abs": 0.000226, "max_abs": 3.795489, "positive": 110, "negative": 64, "zero": 0 }, "source_rank_score": 104.317168, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "bab866be6de1cc5a", "codeword174_sha256_16": "4b4b446b1e4f7aae" }, { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 93, "llr_stats": { "count": 174, "avg_abs": 1.818736, "min_abs": 0.003108, "max_abs": 4.379379, "positive": 34, "negative": 140, "zero": 0 }, "source_rank_score": 99.274944, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "4439454e612f6636", "codeword174_sha256_16": "953e2bc596e8a67e" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 45, "llr_stats": { "count": 174, "avg_abs": 1.666423, "min_abs": 0.002022, "max_abs": 3.950111, "positive": 124, "negative": 50, "zero": 0 }, "source_rank_score": 106.665692, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "1bf4f3a7e6e5f651", "codeword174_sha256_16": "daeb23bbbdf896b0" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 45, "llr_stats": { "count": 174, "avg_abs": 1.625634, "min_abs": 0.003108, "max_abs": 3.895705, "positive": 124, "negative": 50, "zero": 0 }, "source_rank_score": 106.502536, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "1bf4f3a7e6e5f651", "codeword174_sha256_16": "daeb23bbbdf896b0" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 45, "llr_stats": { "count": 174, "avg_abs": 1.617209, "min_abs": 0.001539, "max_abs": 3.944456, "positive": 123, "negative": 51, "zero": 0 }, "source_rank_score": 106.468836, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "202d2650a31499d7", "codeword174_sha256_16": "6c43e3bd22022c79" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 2, "offsets": { "start_offset_s": 0.0, "base_freq_offset_hz": 1.5, "tone_spacing_offset_hz": -0.03 }, "anchor_applied": { "start_seconds": 4.8, "base_freq_hz": 1026.5, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 57600, "start_seconds": 4.8, "base_freq_hz": 1026.5, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:2" }, "best_row": { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 127, "llr_stats": { "count": 174, "avg_abs": 1.733511, "min_abs": 0.012055, "max_abs": 4.121456, "positive": 45, "negative": 129, "zero": 0 }, "source_rank_score": 106.934044, "syndrome_weight": 23, "valid_codeword_hard_decision": false, "message91_sha256_16": "392cab12a34759b9", "codeword174_sha256_16": "5e40b5a83c672886" }, "top_rows": [ { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 127, "llr_stats": { "count": 174, "avg_abs": 1.733511, "min_abs": 0.012055, "max_abs": 4.121456, "positive": 45, "negative": 129, "zero": 0 }, "source_rank_score": 106.934044, "syndrome_weight": 23, "valid_codeword_hard_decision": false, "message91_sha256_16": "392cab12a34759b9", "codeword174_sha256_16": "5e40b5a83c672886" }, { "variant": "reverse_symbol_order", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 44, "llr_stats": { "count": 174, "avg_abs": 1.881544, "min_abs": 0.008612, "max_abs": 4.094064, "positive": 115, "negative": 59, "zero": 0 }, "source_rank_score": 111.526176, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "128117b042d0d534", "codeword174_sha256_16": "b0809bdee52aa2eb" }, { "variant": "reverse_full_bitstream", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 44, "llr_stats": { "count": 174, "avg_abs": 2.029253, "min_abs": 0.008612, "max_abs": 4.159387, "positive": 134, "negative": 40, "zero": 0 }, "source_rank_score": 111.117012, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "128117b042d0d534", "codeword174_sha256_16": "b0809bdee52aa2eb" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 113, "llr_stats": { "count": 174, "avg_abs": 1.409152, "min_abs": 0.001536, "max_abs": 4.121456, "positive": 53, "negative": 121, "zero": 0 }, "source_rank_score": 105.636608, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "a7ec7573558f6d66", "codeword174_sha256_16": "fd238f7999c92f54" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 97, "llr_stats": { "count": 174, "avg_abs": 1.258287, "min_abs": 0.00739, "max_abs": 4.094064, "positive": 73, "negative": 101, "zero": 0 }, "source_rank_score": 105.033148, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "10a0624085517fbb", "codeword174_sha256_16": "2e36371617234c9c" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 1.691846, "min_abs": 3.9e-05, "max_abs": 4.159387, "positive": 139, "negative": 35, "zero": 0 }, "source_rank_score": 106.767384, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "fa72b5aad0016ab4", "codeword174_sha256_16": "9a4cfc262b798d41" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 44, "llr_stats": { "count": 174, "avg_abs": 1.342044, "min_abs": 3.9e-05, "max_abs": 3.408185, "positive": 130, "negative": 44, "zero": 0 }, "source_rank_score": 105.368176, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "ff6f9fd31170e8ba", "codeword174_sha256_16": "1740cb3878bab5bf" }, { "variant": "raw_msb_symbol_order", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 109, "llr_stats": { "count": 174, "avg_abs": 1.807528, "min_abs": 0.007795, "max_abs": 4.094064, "positive": 65, "negative": 109, "zero": 0 }, "source_rank_score": 125.230112, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "07b13c8ed6906112", "codeword174_sha256_16": "00e44a669eea08bb" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 1, "offsets": { "start_offset_s": 0.0, "base_freq_offset_hz": 1.5, "tone_spacing_offset_hz": 0.0 }, "anchor_applied": { "start_seconds": 4.8, "base_freq_hz": 1026.5, "tone_spacing_hz": 1.937984496124031, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 57600, "start_seconds": 4.8, "base_freq_hz": 1026.5, "tone_spacing_hz": 1.937984496124031, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:1" }, "best_row": { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 123, "llr_stats": { "count": 174, "avg_abs": 1.615244, "min_abs": 0.009081, "max_abs": 4.107793, "positive": 49, "negative": 125, "zero": 0 }, "source_rank_score": 106.460976, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "392cab12a34759b9", "codeword174_sha256_16": "5ae8d6b48d414f34" }, "top_rows": [ { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 123, "llr_stats": { "count": 174, "avg_abs": 1.615244, "min_abs": 0.009081, "max_abs": 4.107793, "positive": 49, "negative": 125, "zero": 0 }, "source_rank_score": 106.460976, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "392cab12a34759b9", "codeword174_sha256_16": "5ae8d6b48d414f34" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 95, "llr_stats": { "count": 174, "avg_abs": 1.197035, "min_abs": 0.00517, "max_abs": 3.968945, "positive": 71, "negative": 103, "zero": 0 }, "source_rank_score": 104.78814, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "92b10effeeeb19a8", "codeword174_sha256_16": "1c65597835257916" }, { "variant": "reverse_symbol_order", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 43, "llr_stats": { "count": 174, "avg_abs": 1.775836, "min_abs": 0.021293, "max_abs": 4.112074, "positive": 117, "negative": 57, "zero": 0 }, "source_rank_score": 111.103344, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "c94e2d2f80c7bd08", "codeword174_sha256_16": "746597535b28b3a5" }, { "variant": "reverse_full_bitstream", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 43, "llr_stats": { "count": 174, "avg_abs": 1.924785, "min_abs": 0.021293, "max_abs": 4.127648, "positive": 135, "negative": 39, "zero": 0 }, "source_rank_score": 110.69914, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "c94e2d2f80c7bd08", "codeword174_sha256_16": "746597535b28b3a5" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "raw_msb+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 43, "llr_stats": { "count": 174, "avg_abs": 1.924785, "min_abs": 0.021293, "max_abs": 4.127648, "positive": 135, "negative": 39, "zero": 0 }, "source_rank_score": 107.69914, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "9a11ea1dd34fbb3d", "codeword174_sha256_16": "66658ed247b41bb0" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 108, "llr_stats": { "count": 174, "avg_abs": 1.69607, "min_abs": 0.003643, "max_abs": 4.112074, "positive": 65, "negative": 109, "zero": 0 }, "source_rank_score": 106.78428, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "842583d1534d7dbc", "codeword174_sha256_16": "74a25cd15e35b3d5" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 108, "llr_stats": { "count": 174, "avg_abs": 1.69607, "min_abs": 0.003643, "max_abs": 4.112074, "positive": 65, "negative": 109, "zero": 0 }, "source_rank_score": 106.78428, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "62e51936630c641e", "codeword174_sha256_16": "c52150be96d8413f" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 110, "llr_stats": { "count": 174, "avg_abs": 1.276774, "min_abs": 0.005048, "max_abs": 4.107793, "positive": 53, "negative": 121, "zero": 0 }, "source_rank_score": 105.107096, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "effdee3cae80cf8e", "codeword174_sha256_16": "1bb03d72bab96f47" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 43, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 3.5, "tone_spacing_offset_hz": 0.0 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1028.5, "tone_spacing_hz": 1.937984496124031, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 58320, "start_seconds": 4.86, "base_freq_hz": 1028.5, "tone_spacing_hz": 1.937984496124031, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:43" }, "best_row": { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 49, "llr_stats": { "count": 174, "avg_abs": 1.230206, "min_abs": 0.003136, "max_abs": 3.713292, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 104.920824, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "e20eaf42c9d5a080", "codeword174_sha256_16": "670a833d4cd80958" }, "top_rows": [ { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 49, "llr_stats": { "count": 174, "avg_abs": 1.230206, "min_abs": 0.003136, "max_abs": 3.713292, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 104.920824, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "e20eaf42c9d5a080", "codeword174_sha256_16": "670a833d4cd80958" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 57, "llr_stats": { "count": 174, "avg_abs": 1.180522, "min_abs": 7.3e-05, "max_abs": 4.114918, "positive": 116, "negative": 58, "zero": 0 }, "source_rank_score": 104.722088, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "08c336f0fdbd0b9d", "codeword174_sha256_16": "828c7698f0f759d6" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 113, "llr_stats": { "count": 174, "avg_abs": 1.000414, "min_abs": 0.000314, "max_abs": 3.722453, "positive": 61, "negative": 113, "zero": 0 }, "source_rank_score": 104.001656, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "e9dab226fae4b28e", "codeword174_sha256_16": "6dde07ebf7b5f589" }, { "variant": "lab_mask_xor_preview", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 93, "llr_stats": { "count": 174, "avg_abs": 2.092034, "min_abs": 0.019209, "max_abs": 4.114918, "positive": 138, "negative": 36, "zero": 0 }, "source_rank_score": 100.368136, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "2cd135c17dd2b470", "codeword174_sha256_16": "fc7ab1ab87744044" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_lsb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 120, "llr_stats": { "count": 174, "avg_abs": 1.221856, "min_abs": 1.9e-05, "max_abs": 4.114918, "positive": 52, "negative": 122, "zero": 0 }, "source_rank_score": 104.887424, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "dccfb96fe1c80677", "codeword174_sha256_16": "29a87a46c7d870ae" }, { "variant": "reverse_full_bitstream", "transform": "ft8_gray_alt_high_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 35, "llr_stats": { "count": 174, "avg_abs": 1.753358, "min_abs": 0.003136, "max_abs": 4.114918, "positive": 138, "negative": 36, "zero": 0 }, "source_rank_score": 110.013432, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "510b5025f519b4a7", "codeword174_sha256_16": "d5e243f42868b95b" }, { "variant": "reverse_symbol_order", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 35, "llr_stats": { "count": 174, "avg_abs": 1.451951, "min_abs": 0.003136, "max_abs": 3.728632, "positive": 120, "negative": 54, "zero": 0 }, "source_rank_score": 109.807804, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "510b5025f519b4a7", "codeword174_sha256_16": "d5e243f42868b95b" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 47, "llr_stats": { "count": 174, "avg_abs": 1.057476, "min_abs": 2.3e-05, "max_abs": 3.114307, "positive": 128, "negative": 46, "zero": 0 }, "source_rank_score": 104.229904, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "4781b790b251315c", "codeword174_sha256_16": "777c0990b801d669" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 21, "offsets": { "start_offset_s": 0.03, "base_freq_offset_hz": 2.0, "tone_spacing_offset_hz": 0.03 }, "anchor_applied": { "start_seconds": 4.83, "base_freq_hz": 1027.0, "tone_spacing_hz": 1.967984496124031, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 57960, "start_seconds": 4.83, "base_freq_hz": 1027.0, "tone_spacing_hz": 1.967984496124031, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:21" }, "best_row": { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 103, "llr_stats": { "count": 174, "avg_abs": 1.014755, "min_abs": 0.001418, "max_abs": 3.82154, "positive": 71, "negative": 103, "zero": 0 }, "source_rank_score": 104.05902, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "f6f9e2c65d361950", "codeword174_sha256_16": "a34f30514f1147be" }, "top_rows": [ { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 103, "llr_stats": { "count": 174, "avg_abs": 1.014755, "min_abs": 0.001418, "max_abs": 3.82154, "positive": 71, "negative": 103, "zero": 0 }, "source_rank_score": 104.05902, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "f6f9e2c65d361950", "codeword174_sha256_16": "a34f30514f1147be" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 134, "llr_stats": { "count": 174, "avg_abs": 1.51667, "min_abs": 1.8e-05, "max_abs": 4.144111, "positive": 40, "negative": 134, "zero": 0 }, "source_rank_score": 106.06668, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "daab820710a9a228", "codeword174_sha256_16": "16654f047cae3428" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 45, "llr_stats": { "count": 174, "avg_abs": 1.128579, "min_abs": 1.8e-05, "max_abs": 3.363492, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 104.514316, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "d40791f46d2a4b11", "codeword174_sha256_16": "9dca28554c5a2316" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_msb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 58, "llr_stats": { "count": 174, "avg_abs": 1.225323, "min_abs": 0.002329, "max_abs": 3.956982, "positive": 126, "negative": 48, "zero": 0 }, "source_rank_score": 104.901292, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "a7c653e33db6db7c", "codeword174_sha256_16": "04e767b23e20bf0a" }, { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 34, "llr_stats": { "count": 174, "avg_abs": 2.163748, "min_abs": 0.014686, "max_abs": 4.144111, "positive": 141, "negative": 33, "zero": 0 }, "source_rank_score": 108.654992, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "cc61e58f86747a77", "codeword174_sha256_16": "71bebbfd08ed2f9a" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 122, "llr_stats": { "count": 174, "avg_abs": 1.636108, "min_abs": 0.015006, "max_abs": 3.82154, "positive": 49, "negative": 125, "zero": 0 }, "source_rank_score": 106.544432, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "f6de0dff4166858e", "codeword174_sha256_16": "a8a90b25176d03db" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 108, "llr_stats": { "count": 174, "avg_abs": 1.159192, "min_abs": 0.003014, "max_abs": 3.956982, "positive": 60, "negative": 114, "zero": 0 }, "source_rank_score": 104.636768, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "14fd4623952966b5", "codeword174_sha256_16": "fafeccfe3224ee30" }, { "variant": "raw_msb_symbol_order", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 49, "llr_stats": { "count": 174, "avg_abs": 1.750816, "min_abs": 0.003492, "max_abs": 4.144111, "positive": 127, "negative": 47, "zero": 0 }, "source_rank_score": 125.003264, "syndrome_weight": 33, "valid_codeword_hard_decision": false, "message91_sha256_16": "766a43ca41ee0172", "codeword174_sha256_16": "7d9bcf61433ea9fd" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 39, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 2.5, "tone_spacing_offset_hz": 0.03 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1027.5, "tone_spacing_hz": 1.967984496124031, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 58320, "start_seconds": 4.86, "base_freq_hz": 1027.5, "tone_spacing_hz": 1.967984496124031, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:39" }, "best_row": { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 126, "llr_stats": { "count": 174, "avg_abs": 1.636445, "min_abs": 0.04144, "max_abs": 4.144109, "positive": 48, "negative": 126, "zero": 0 }, "source_rank_score": 106.54578, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "25788c17f810b7d5", "codeword174_sha256_16": "87afe3fe5c58aa69" }, "top_rows": [ { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 126, "llr_stats": { "count": 174, "avg_abs": 1.636445, "min_abs": 0.04144, "max_abs": 4.144109, "positive": 48, "negative": 126, "zero": 0 }, "source_rank_score": 106.54578, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "25788c17f810b7d5", "codeword174_sha256_16": "87afe3fe5c58aa69" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 43, "llr_stats": { "count": 174, "avg_abs": 1.29064, "min_abs": 0.002158, "max_abs": 4.085972, "positive": 136, "negative": 38, "zero": 0 }, "source_rank_score": 105.16256, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "d7fbffc39612c219", "codeword174_sha256_16": "b1faca9af1fcf29e" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 140, "llr_stats": { "count": 174, "avg_abs": 2.221352, "min_abs": 0.057726, "max_abs": 4.144109, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 108.885408, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "0329e23109e06988", "codeword174_sha256_16": "cb10f2e95870a14d" }, { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 126, "llr_stats": { "count": 174, "avg_abs": 1.549534, "min_abs": 0.04144, "max_abs": 4.085972, "positive": 48, "negative": 126, "zero": 0 }, "source_rank_score": 106.198136, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "c203e9dd4e290c80", "codeword174_sha256_16": "93022f63b6f5a179" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 45, "llr_stats": { "count": 174, "avg_abs": 1.647117, "min_abs": 0.014093, "max_abs": 4.109742, "positive": 133, "negative": 41, "zero": 0 }, "source_rank_score": 106.588468, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "ce0c8b98f36c5477", "codeword174_sha256_16": "0686743576218a8e" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 57, "llr_stats": { "count": 174, "avg_abs": 1.600836, "min_abs": 0.007559, "max_abs": 3.884246, "positive": 120, "negative": 54, "zero": 0 }, "source_rank_score": 106.403344, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "bccfcf3a9d2d88f9", "codeword174_sha256_16": "789a455223ead9d0" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 55, "llr_stats": { "count": 174, "avg_abs": 1.201724, "min_abs": 4.7e-05, "max_abs": 3.041852, "positive": 120, "negative": 54, "zero": 0 }, "source_rank_score": 104.806896, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "1ba13df646b9fda8", "codeword174_sha256_16": "e6afe9485a3d19c5" }, { "variant": "raw_msb_symbol_order", "transform": "lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 140, "llr_stats": { "count": 174, "avg_abs": 2.221352, "min_abs": 0.057726, "max_abs": 4.144109, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 126.885408, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "064d4295f7c48336", "codeword174_sha256_16": "4b1f5a7ddad8966d" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 8, "offsets": { "start_offset_s": 0.0, "base_freq_offset_hz": 2.5, "tone_spacing_offset_hz": -0.03 }, "anchor_applied": { "start_seconds": 4.8, "base_freq_hz": 1027.5, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 57600, "start_seconds": 4.8, "base_freq_hz": 1027.5, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:8" }, "best_row": { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 56, "llr_stats": { "count": 174, "avg_abs": 1.265569, "min_abs": 0.007883, "max_abs": 4.01973, "positive": 124, "negative": 50, "zero": 0 }, "source_rank_score": 105.062276, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "6548c013cab69e1e", "codeword174_sha256_16": "e4a052902783f611" }, "top_rows": [ { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 56, "llr_stats": { "count": 174, "avg_abs": 1.265569, "min_abs": 0.007883, "max_abs": 4.01973, "positive": 124, "negative": 50, "zero": 0 }, "source_rank_score": 105.062276, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "6548c013cab69e1e", "codeword174_sha256_16": "e4a052902783f611" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 135, "llr_stats": { "count": 174, "avg_abs": 1.595277, "min_abs": 0.001058, "max_abs": 4.048874, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 106.381108, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "9e57d9fb308e6dee", "codeword174_sha256_16": "cc67285942c115ea" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 142, "llr_stats": { "count": 174, "avg_abs": 1.609719, "min_abs": 0.001956, "max_abs": 4.292074, "positive": 27, "negative": 147, "zero": 0 }, "source_rank_score": 106.438876, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "6b3d67c760fd57be", "codeword174_sha256_16": "732f86ed92cad209" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 135, "llr_stats": { "count": 174, "avg_abs": 1.595277, "min_abs": 0.001058, "max_abs": 4.048874, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 106.381108, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "c481def080ab9cb5", "codeword174_sha256_16": "47ebcc4bfd1fb637" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+no_interleaver", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 38, "llr_stats": { "count": 174, "avg_abs": 1.887501, "min_abs": 0.018857, "max_abs": 4.292074, "positive": 143, "negative": 31, "zero": 0 }, "source_rank_score": 107.550004, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "937823f97ed0847f", "codeword174_sha256_16": "9e5b66bac1556b29" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 138, "llr_stats": { "count": 174, "avg_abs": 1.609717, "min_abs": 0.003224, "max_abs": 4.292074, "positive": 31, "negative": 143, "zero": 0 }, "source_rank_score": 106.438868, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "46cc6ddc9712ac68", "codeword174_sha256_16": "4235701b167d47ee" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 138, "llr_stats": { "count": 174, "avg_abs": 1.585003, "min_abs": 8.3e-05, "max_abs": 4.292074, "positive": 33, "negative": 141, "zero": 0 }, "source_rank_score": 106.340012, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "46cc6ddc9712ac68", "codeword174_sha256_16": "4235701b167d47ee" }, { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 90, "llr_stats": { "count": 174, "avg_abs": 1.644885, "min_abs": 0.001088, "max_abs": 4.048874, "positive": 40, "negative": 134, "zero": 0 }, "source_rank_score": 98.57954, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "2a5e5b0263df5195", "codeword174_sha256_16": "4f91b6dc101564e5" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 41, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 3.0, "tone_spacing_offset_hz": -0.03 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 58320, "start_seconds": 4.86, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:41" }, "best_row": { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 54, "llr_stats": { "count": 174, "avg_abs": 1.071337, "min_abs": 0.008389, "max_abs": 4.378399, "positive": 115, "negative": 59, "zero": 0 }, "source_rank_score": 104.285348, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "7db4ad98fe1e49ac", "codeword174_sha256_16": "7761891a2eaf0907" }, "top_rows": [ { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 54, "llr_stats": { "count": 174, "avg_abs": 1.071337, "min_abs": 0.008389, "max_abs": 4.378399, "positive": 115, "negative": 59, "zero": 0 }, "source_rank_score": 104.285348, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "7db4ad98fe1e49ac", "codeword174_sha256_16": "7761891a2eaf0907" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 54, "llr_stats": { "count": 174, "avg_abs": 1.152765, "min_abs": 0.002806, "max_abs": 4.378399, "positive": 124, "negative": 50, "zero": 0 }, "source_rank_score": 104.61106, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "7db4ad98fe1e49ac", "codeword174_sha256_16": "e0bef0ec308e802c" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 59, "llr_stats": { "count": 174, "avg_abs": 0.944583, "min_abs": 0.000269, "max_abs": 3.784521, "positive": 114, "negative": 60, "zero": 0 }, "source_rank_score": 103.778332, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "9f88e54e8b6a8ee7", "codeword174_sha256_16": "d7384dff1531e25f" }, { "variant": "lab_mask_xor_preview", "transform": "lsb_within_each_tone+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 85, "llr_stats": { "count": 174, "avg_abs": 2.042063, "min_abs": 0.027988, "max_abs": 4.378399, "positive": 41, "negative": 133, "zero": 0 }, "source_rank_score": 100.168252, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "b66ebffa64074608", "codeword174_sha256_16": "43e29a9a3cd43903" }, { "variant": "reverse_symbol_order", "transform": "raw_msb+no_interleaver", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 42, "llr_stats": { "count": 174, "avg_abs": 2.042063, "min_abs": 0.027988, "max_abs": 4.378399, "positive": 133, "negative": 41, "zero": 0 }, "source_rank_score": 112.168252, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "632654c49dc26f7e", "codeword174_sha256_16": "35185e117fcf4f1a" }, { "variant": "reverse_full_bitstream", "transform": "lsb_within_each_tone+no_interleaver", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 42, "llr_stats": { "count": 174, "avg_abs": 2.042063, "min_abs": 0.027988, "max_abs": 4.378399, "positive": 133, "negative": 41, "zero": 0 }, "source_rank_score": 111.168252, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "632654c49dc26f7e", "codeword174_sha256_16": "35185e117fcf4f1a" }, { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 84, "llr_stats": { "count": 174, "avg_abs": 1.413691, "min_abs": 0.000298, "max_abs": 3.784521, "positive": 119, "negative": 55, "zero": 0 }, "source_rank_score": 97.654764, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "02e61e7bdafc459a", "codeword174_sha256_16": "54ce9719c19c39cc" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "raw_msb+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 133, "llr_stats": { "count": 174, "avg_abs": 1.682332, "min_abs": 0.011206, "max_abs": 4.378399, "positive": 41, "negative": 133, "zero": 0 }, "source_rank_score": 106.729328, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "39a87ca136a11c0a", "codeword174_sha256_16": "f1661db6a28115ad" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 14, "offsets": { "start_offset_s": 0.0, "base_freq_offset_hz": 3.5, "tone_spacing_offset_hz": -0.03 }, "anchor_applied": { "start_seconds": 4.8, "base_freq_hz": 1028.5, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 57600, "start_seconds": 4.8, "base_freq_hz": 1028.5, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:14" }, "best_row": { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 84, "llr_stats": { "count": 174, "avg_abs": 1.811424, "min_abs": 0.004549, "max_abs": 4.160775, "positive": 28, "negative": 146, "zero": 0 }, "source_rank_score": 99.245696, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "6d4c90342d0cd9cf", "codeword174_sha256_16": "fcc1684905e18849" }, "top_rows": [ { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 84, "llr_stats": { "count": 174, "avg_abs": 1.811424, "min_abs": 0.004549, "max_abs": 4.160775, "positive": 28, "negative": 146, "zero": 0 }, "source_rank_score": 99.245696, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "6d4c90342d0cd9cf", "codeword174_sha256_16": "fcc1684905e18849" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 46, "llr_stats": { "count": 174, "avg_abs": 1.577969, "min_abs": 0.032989, "max_abs": 4.160775, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 106.311876, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "0d245b70feba1bf6", "codeword174_sha256_16": "f1b0e4aa08c03e19" }, { "variant": "raw_msb_symbol_order", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 129, "llr_stats": { "count": 174, "avg_abs": 1.528267, "min_abs": 0.00871, "max_abs": 3.91927, "positive": 45, "negative": 129, "zero": 0 }, "source_rank_score": 124.113068, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "a1a97b2eec802f24", "codeword174_sha256_16": "5836d586f9603ce6" }, { "variant": "raw_msb_symbol_order", "transform": "ft8_gray_alt_high_demap_lsb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 129, "llr_stats": { "count": 174, "avg_abs": 1.485923, "min_abs": 0.004549, "max_abs": 3.91927, "positive": 44, "negative": 130, "zero": 0 }, "source_rank_score": 123.943692, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "a1a97b2eec802f24", "codeword174_sha256_16": "5836d586f9603ce6" }, { "variant": "lsb_within_each_tone", "transform": "ft8_gray_primary_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 129, "llr_stats": { "count": 174, "avg_abs": 1.853768, "min_abs": 0.00871, "max_abs": 4.160775, "positive": 29, "negative": 145, "zero": 0 }, "source_rank_score": 117.415072, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "a1a97b2eec802f24", "codeword174_sha256_16": "5836d586f9603ce6" }, { "variant": "lsb_within_each_tone", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 129, "llr_stats": { "count": 174, "avg_abs": 1.811424, "min_abs": 0.004549, "max_abs": 4.160775, "positive": 28, "negative": 146, "zero": 0 }, "source_rank_score": 117.245696, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "a1a97b2eec802f24", "codeword174_sha256_16": "5836d586f9603ce6" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 129, "llr_stats": { "count": 174, "avg_abs": 1.528267, "min_abs": 0.00871, "max_abs": 3.91927, "positive": 45, "negative": 129, "zero": 0 }, "source_rank_score": 106.113068, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "a1a97b2eec802f24", "codeword174_sha256_16": "5836d586f9603ce6" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "raw_msb+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 129, "llr_stats": { "count": 174, "avg_abs": 1.528267, "min_abs": 0.00871, "max_abs": 3.91927, "positive": 45, "negative": 129, "zero": 0 }, "source_rank_score": 106.113068, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "a1a97b2eec802f24", "codeword174_sha256_16": "5836d586f9603ce6" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 37, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 2.5, "tone_spacing_offset_hz": 0.0 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1027.5, "tone_spacing_hz": 1.937984496124031, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 58320, "start_seconds": 4.86, "base_freq_hz": 1027.5, "tone_spacing_hz": 1.937984496124031, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:37" }, "best_row": { "variant": "mapped_raw_msb+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 33, "llr_stats": { "count": 174, "avg_abs": 2.228872, "min_abs": 0.041868, "max_abs": 4.18324, "positive": 141, "negative": 33, "zero": 0 }, "source_rank_score": 108.915488, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "0259bb98617eb22e", "codeword174_sha256_16": "6c1338e037549e54" }, "top_rows": [ { "variant": "mapped_raw_msb+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 33, "llr_stats": { "count": 174, "avg_abs": 2.228872, "min_abs": 0.041868, "max_abs": 4.18324, "positive": 141, "negative": 33, "zero": 0 }, "source_rank_score": 108.915488, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "0259bb98617eb22e", "codeword174_sha256_16": "6c1338e037549e54" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 120, "llr_stats": { "count": 174, "avg_abs": 1.206909, "min_abs": 9.8e-05, "max_abs": 3.852127, "positive": 54, "negative": 120, "zero": 0 }, "source_rank_score": 104.827636, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "8f42609d6f1fc182", "codeword174_sha256_16": "45fb5a75f115763f" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 120, "llr_stats": { "count": 174, "avg_abs": 1.189499, "min_abs": 0.000127, "max_abs": 3.852127, "positive": 50, "negative": 124, "zero": 0 }, "source_rank_score": 104.757996, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "8f42609d6f1fc182", "codeword174_sha256_16": "45fb5a75f115763f" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 45, "llr_stats": { "count": 174, "avg_abs": 1.624396, "min_abs": 0.028992, "max_abs": 4.045437, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 106.497584, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "6f3b78f2a0789ec1", "codeword174_sha256_16": "10fa5f26d7f3c832" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 125, "llr_stats": { "count": 174, "avg_abs": 1.365276, "min_abs": 0.001421, "max_abs": 4.076297, "positive": 44, "negative": 130, "zero": 0 }, "source_rank_score": 105.461104, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "50ee3ebb2853f49e", "codeword174_sha256_16": "d12d6e7fd563854d" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 125, "llr_stats": { "count": 174, "avg_abs": 1.324012, "min_abs": 0.005023, "max_abs": 4.076297, "positive": 49, "negative": 125, "zero": 0 }, "source_rank_score": 105.296048, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "50ee3ebb2853f49e", "codeword174_sha256_16": "d12d6e7fd563854d" }, { "variant": "mapped_raw_msb+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 126, "llr_stats": { "count": 174, "avg_abs": 1.718599, "min_abs": 0.017042, "max_abs": 4.076297, "positive": 47, "negative": 127, "zero": 0 }, "source_rank_score": 106.874396, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "765c4ebc3707fdb0", "codeword174_sha256_16": "1fe0c66a7e9cf192" }, { "variant": "mapped_raw_msb+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 48, "llr_stats": { "count": 174, "avg_abs": 1.674076, "min_abs": 0.017042, "max_abs": 4.18324, "positive": 127, "negative": 47, "zero": 0 }, "source_rank_score": 106.696304, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "6057dbf97536ae1a", "codeword174_sha256_16": "0cbeded997791328" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 6, "offsets": { "start_offset_s": 0.0, "base_freq_offset_hz": 2.0, "tone_spacing_offset_hz": 0.03 }, "anchor_applied": { "start_seconds": 4.8, "base_freq_hz": 1027.0, "tone_spacing_hz": 1.967984496124031, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 57600, "start_seconds": 4.8, "base_freq_hz": 1027.0, "tone_spacing_hz": 1.967984496124031, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:6" }, "best_row": { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 41, "llr_stats": { "count": 174, "avg_abs": 1.742956, "min_abs": 0.016767, "max_abs": 4.307136, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 106.971824, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "04a04a473d9f4b8a", "codeword174_sha256_16": "bb9158f6426e5474" }, "top_rows": [ { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 41, "llr_stats": { "count": 174, "avg_abs": 1.742956, "min_abs": 0.016767, "max_abs": 4.307136, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 106.971824, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "04a04a473d9f4b8a", "codeword174_sha256_16": "bb9158f6426e5474" }, { "variant": "reverse_symbol_order", "transform": "raw_msb+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 142, "llr_stats": { "count": 174, "avg_abs": 2.244529, "min_abs": 0.061415, "max_abs": 4.307136, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 112.978116, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "4f116d0d2d97efad", "codeword174_sha256_16": "1ee0e2fbd4d51be6" }, { "variant": "reverse_full_bitstream", "transform": "lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 142, "llr_stats": { "count": 174, "avg_abs": 2.244529, "min_abs": 0.061415, "max_abs": 4.307136, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 111.978116, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "4f116d0d2d97efad", "codeword174_sha256_16": "1ee0e2fbd4d51be6" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 37, "llr_stats": { "count": 174, "avg_abs": 1.902489, "min_abs": 0.041499, "max_abs": 4.063879, "positive": 137, "negative": 37, "zero": 0 }, "source_rank_score": 107.609956, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "5e2bcbbdc8cb3e2a", "codeword174_sha256_16": "ac458b913c953919" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 137, "llr_stats": { "count": 174, "avg_abs": 1.902489, "min_abs": 0.041499, "max_abs": 4.063879, "positive": 37, "negative": 137, "zero": 0 }, "source_rank_score": 107.609956, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "5d363667677b4ebf", "codeword174_sha256_16": "5f395d3ae3d410f8" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 117, "llr_stats": { "count": 174, "avg_abs": 1.217101, "min_abs": 0.010473, "max_abs": 4.109301, "positive": 55, "negative": 119, "zero": 0 }, "source_rank_score": 104.868404, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "00e0e71440a516c6", "codeword174_sha256_16": "6f3fc74324df2743" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 119, "llr_stats": { "count": 174, "avg_abs": 1.165809, "min_abs": 0.003322, "max_abs": 4.109301, "positive": 58, "negative": 116, "zero": 0 }, "source_rank_score": 104.663236, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "aca78234d03d9e6e", "codeword174_sha256_16": "545b323981ac1f0b" }, { "variant": "raw_msb_symbol_order", "transform": "lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 142, "llr_stats": { "count": 174, "avg_abs": 2.244529, "min_abs": 0.061415, "max_abs": 4.307136, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 126.978116, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "56db10214087a30c", "codeword174_sha256_16": "04161507fe78a98a" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 26, "offsets": { "start_offset_s": 0.03, "base_freq_offset_hz": 3.0, "tone_spacing_offset_hz": -0.03 }, "anchor_applied": { "start_seconds": 4.83, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 57960, "start_seconds": 4.83, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.9079844961240309, "nsps": 6192, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step51_source_aligned_timing_sweep:26" }, "best_row": { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 37, "llr_stats": { "count": 174, "avg_abs": 1.730043, "min_abs": 0.021616, "max_abs": 4.058353, "positive": 138, "negative": 36, "zero": 0 }, "source_rank_score": 106.920172, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "b85913e71a6e72e1", "codeword174_sha256_16": "e86c99d44140da4f" }, "top_rows": [ { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 37, "llr_stats": { "count": 174, "avg_abs": 1.730043, "min_abs": 0.021616, "max_abs": 4.058353, "positive": 138, "negative": 36, "zero": 0 }, "source_rank_score": 106.920172, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "b85913e71a6e72e1", "codeword174_sha256_16": "e86c99d44140da4f" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 109, "llr_stats": { "count": 174, "avg_abs": 0.947826, "min_abs": 0.000717, "max_abs": 3.411851, "positive": 68, "negative": 106, "zero": 0 }, "source_rank_score": 103.791304, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "63d7de999dc28356", "codeword174_sha256_16": "2ad9b1a14cd85e5c" }, { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 89, "llr_stats": { "count": 174, "avg_abs": 1.857069, "min_abs": 0.01092, "max_abs": 4.006713, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 99.428276, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "f3209b00dbbed253", "codeword174_sha256_16": "135a8970b67957e7" }, { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 81, "llr_stats": { "count": 174, "avg_abs": 1.51869, "min_abs": 0.01092, "max_abs": 3.732172, "positive": 123, "negative": 51, "zero": 0 }, "source_rank_score": 98.07476, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "4dc8b43767d57817", "codeword174_sha256_16": "78617f41a52a8853" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 130, "llr_stats": { "count": 174, "avg_abs": 1.736354, "min_abs": 0.024218, "max_abs": 4.151228, "positive": 45, "negative": 129, "zero": 0 }, "source_rank_score": 106.945416, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "b514dccc3f8f2f30", "codeword174_sha256_16": "e7b301d31e50e275" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 130, "llr_stats": { "count": 174, "avg_abs": 1.686625, "min_abs": 0.011664, "max_abs": 4.151228, "positive": 46, "negative": 128, "zero": 0 }, "source_rank_score": 106.7465, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "b514dccc3f8f2f30", "codeword174_sha256_16": "e7b301d31e50e275" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 126, "llr_stats": { "count": 174, "avg_abs": 1.567434, "min_abs": 0.000989, "max_abs": 3.732172, "positive": 51, "negative": 123, "zero": 0 }, "source_rank_score": 106.269736, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "810a0472f0698b8d", "codeword174_sha256_16": "4316a723d47fd8eb" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 129, "llr_stats": { "count": 174, "avg_abs": 1.34105, "min_abs": 0.01092, "max_abs": 4.006713, "positive": 42, "negative": 132, "zero": 0 }, "source_rank_score": 105.3642, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "9b97c830c0ad11f6", "codeword174_sha256_16": "06400af302ea8869" } ], "warnings": [ "Step 51 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 51 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 51 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 51 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] } ], "outputs": { "timing_boundary_sweep_json": "/decoders/js8_decoder/runtime/timing_boundary_sweep/step51_source_aligned_timing_boundary_sweep.json", "timing_best_candidate_json": "/decoders/js8_decoder/runtime/timing_boundary_sweep/step51_source_aligned_best_timing_fec_candidate.json", "checkpoint_json": "/decoders/js8_decoder/logs/20260527T110128Z_real_run_timing_boundary_sweep_output.json" }, "decodes": [], "warnings": [ "Step 51 expands the Step36 edge hit and exports the best timing candidate for downstream LDPC soft-decode.", "No JS8 text unpack or CRC validation is performed yet.", "No valid LDPC codeword found is a diagnostic warning, not a hard command failure." ], "next_action": "Use outputs.timing_best_candidate_json for LDPC matrix/soft decode. If syndrome is still far from 0, continue interleaver/LLR and symbol-boundary tuning around the best_candidate." } } }, "bundles": [ { "name": "js8_decoder_lab_real_run_20260527T110128Z.zip", "url": "/logs/js8_decoder_lab_real_run_20260527T110128Z.zip", "size": 5270021, "mtime_utc": "2026-05-27T11:12:34Z" }, { "name": "js8_decoder_lab_real_run_20260527T104133Z.zip", "url": "/logs/js8_decoder_lab_real_run_20260527T104133Z.zip", "size": 4699383, "mtime_utc": "2026-05-27T10:50:00Z" }, { "name": "js8_decoder_lab_full_audit_20260527T100315Z.zip", "url": "/logs/js8_decoder_lab_full_audit_20260527T100315Z.zip", "size": 4129065, "mtime_utc": "2026-05-27T10:03:35Z" }, { "name": "js8_decoder_lab_full_audit_20260527T084305Z.zip", "url": "/logs/js8_decoder_lab_full_audit_20260527T084305Z.zip", "size": 4007964, "mtime_utc": "2026-05-27T08:51:47Z" }, { "name": "js8_decoder_lab_real_run_20260527T082046Z.zip", "url": "/logs/js8_decoder_lab_real_run_20260527T082046Z.zip", "size": 4028163, "mtime_utc": 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"/logs/20260527T104848Z_message91-validate_manifest.json" }, { "name": "20260527T104848Z_message91_validate_output.json", "size": 946054, "mtime_utc": "2026-05-27T10:48:51Z", "url": "/logs/20260527T104848Z_message91_validate_output.json" }, { "name": "20260527T104848Z_message91_validate_output.stderr.log", "size": 0, "mtime_utc": "2026-05-27T10:48:48Z", "url": "/logs/20260527T104848Z_message91_validate_output.stderr.log" }, { "name": "20260527T104839Z_ldpc-soft-decode.log", "size": 119128, "mtime_utc": "2026-05-27T10:48:48Z", "url": "/logs/20260527T104839Z_ldpc-soft-decode.log" }, { "name": "20260527T104839Z_ldpc-soft-decode_manifest.json", "size": 925, "mtime_utc": "2026-05-27T10:48:48Z", "url": "/logs/20260527T104839Z_ldpc-soft-decode_manifest.json" }, { "name": "20260527T104839Z_ldpc_soft_decode_output.json", "size": 118390, "mtime_utc": "2026-05-27T10:48:47Z", "url": "/logs/20260527T104839Z_ldpc_soft_decode_output.json" }, { "name": "20260527T104839Z_ldpc_soft_decode_output.stderr.log", "size": 0, "mtime_utc": "2026-05-27T10:48:39Z", "url": "/logs/20260527T104839Z_ldpc_soft_decode_output.stderr.log" } ], "browser_links": { "home": "/", "api_report": "/api/report", "logs": "/logs/" }, "note": "Read-only browser report for JS8 Decoder Lab logs. It does not start TX/PTT/Tune/Send or control JS8Call runtime." }