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\"tone_mapping\": \"ft8_gray_primary\",\n \"gray_direction\": \"inverse_observed_to_plain\",\n \"reverse_bits_within_tone_before_gray\": true,\n \"interleaver\": \"none\",\n \"polarity\": \"inverted\"\n },\n \"decoder_trial\": {\n \"llr_scale\": 0.75,\n \"alpha\": 0.7\n },\n \"source_rank_score\": 113.063032,\n \"source_llr_stats\": {\n \"count\": 174,\n \"avg_abs\": 2.265758,\n \"min_abs\": 0.020953,\n \"max_abs\": 4.126624,\n \"positive\": 139,\n \"negative\": 35,\n \"zero\": 0\n },\n \"success\": false,\n \"iterations_used\": 24,\n \"final_syndrome_weight\": 34,\n \"message91\": null,\n \"message91_sha256_16\": \"9840b53bd4cff7c6\",\n \"codeword174_sha256_16\": \"0f3fddb5ca7ce9c3\",\n \"trace\": [\n {\n \"iteration\": 0,\n \"syndrome_weight\": 42\n },\n {\n \"iteration\": 1,\n \"syndrome_weight\": 42\n },\n {\n \"iteration\": 2,\n \"syndrome_weight\": 42\n },\n {\n \"iteration\": 3,\n \"syndrome_weight\": 45\n },\n {\n \"iteration\": 4,\n \"syndrome_weight\": 37\n },\n {\n \"iteration\": 5,\n \"syndrome_weight\": 45\n },\n {\n \"iteration\": 6,\n \"syndrome_weight\": 43\n },\n {\n \"iteration\": 7,\n \"syndrome_weight\": 43\n },\n {\n \"iteration\": 8,\n \"syndrome_weight\": 35\n },\n {\n \"iteration\": 9,\n \"syndrome_weight\": 40\n },\n {\n \"iteration\": 10,\n \"syndrome_weight\": 39\n },\n {\n \"iteration\": 15,\n \"syndrome_weight\": 42\n },\n {\n \"iteration\": 20,\n \"syndrome_weight\": 39\n }\n ]\n },\n {\n \"variant\": \"mapped_raw_msb+ft8_bitrev_deinterleave_rx_to_codeword\",\n \"transform\": \"ft8_gray_alt_high_demap_lsb_input+no_interleaver\",\n \"mapping_meta\": {\n \"tone_mapping\": \"ft8_gray_alt_high\",\n \"gray_direction\": \"inverse_observed_to_plain\",\n \"reverse_bits_within_tone_before_gray\": true,\n \"interleaver\": \"none\"\n },\n \"decoder_trial\": {\n \"llr_scale\": 1.0,\n \"alpha\": 0.8\n },\n \"source_rank_score\": 109.063032,\n \"source_llr_stats\": {\n \"count\": 174,\n \"avg_abs\": 2.265758,\n \"min_abs\": 0.020953,\n \"max_abs\": 4.126624,\n \"positive\": 139,\n \"negative\": 35,\n \"zero\": 0\n },\n \"success\": false,\n \"iterations_used\": 24,\n \"final_syndrome_weight\": 34,\n \"message91\": null,\n \"message91_sha256_16\": \"07985c5b49461190\",\n \"codeword174_sha256_16\": \"c148a530d15360d5\",\n \"trace\": [\n {\n \"iteration\": 0,\n \"syndrome_weight\": 42\n },\n {\n \"iteration\": 1,\n \"syndrome_weight\": 39\n },\n {\n \"iteration\": 2,\n \"syndrome_weight\": 35\n },\n {\n \"iteration\": 3,\n \"syndrome_weight\": 43\n },\n {\n \"iteration\": 4,\n \"syndrome_weight\": 38\n },\n {\n \"iteration\": 5,\n \"syndrome_weight\": 37\n },\n {\n \"iteration\": 6,\n \"syndrome_weight\": 41\n },\n {\n \"iteration\": 7,\n \"syndrome_weight\": 43\n },\n {\n \"iteration\": 8,\n \"syndrome_weight\": 46\n },\n {\n \"iteration\": 9,\n \"syndrome_weight\": 38\n },\n {\n \"iteration\": 10,\n \"syndrome_weight\": 34\n },\n {\n \"iteration\": 15,\n \"syndrome_weight\": 36\n },\n {\n \"iteration\": 20,\n \"syndrome_weight\": 40\n }\n ]\n }\n ],\n \"decodes\": [],\n \"outputs\": {\n \"ldpc_soft_decode_json\": \"/decoders/js8_decoder/runtime/ldpc_soft_decode/step38_ldpc_soft_decode.json\"\n },\n \"warnings\": [\n \"Step 38 runs bounded normalized-min-sum soft LDPC over the best-ranked FT8-style Gray/interleaver mapping candidates against the public (174,91) matrix contract.\",\n \"This still does not unpack JS8 text or validate CRC/message payloads.\",\n \"If success is true and syndrome_weight is 0, the next step can unpack the 91-bit message. Otherwise more timing, Costas/data-symbol boundary, deinterleaver/order or LLR tuning is required.\"\n ],\n \"next_action\": \"Upload Step35 logs. If no valid codeword, inspect best mapping_meta/final_syndrome_weight and continue timing/interleaver/LLR tuning; if valid, add JS8 message unpack/CRC.\"\n}\n\n[webftr-js8-lab] OK\n[webftr-js8-lab] log file: /decoders/js8_decoder/logs/20260527T042715Z_ldpc-soft-decode.log\n[webftr-js8-lab] manifest: /decoders/js8_decoder/logs/20260527T042715Z_ldpc-soft-decode_manifest.json\n[webftr-js8-lab] ldpc-soft-decode exit_code=0\n\n========== REAL-RUN STEP 10/10: JS8LAB LOG BUNDLE ==========\n[webftr-js8-lab] collecting JS8Lab logs from /decoders/js8_decoder/logs\n[webftr-js8-lab] upload this JS8Lab bundle: /decoders/js8_decoder/logs/js8_decoder_lab_real_run_20260527T041823Z.zip\n\n[webftr-js8-lab] OK\n[webftr-js8-lab] log file: /decoders/js8_decoder/logs/20260527T041823Z_real-run.log\n[webftr-js8-lab] manifest: /decoders/js8_decoder/logs/20260527T041823Z_real-run_manifest.json\n\n[webftr-js8-lab] OK\n[webftr-js8-lab] log file: /decoders/js8_decoder/logs/20260527T041823Z_server-deep-run.log\n[webftr-js8-lab] manifest: /decoders/js8_decoder/logs/20260527T041823Z_server-deep-run_manifest.json\n" }, "output_refs": { "input_check": { "name": "20260527T041823Z_input_check_output.json", "path": "/decoders/js8_decoder/logs/20260527T041823Z_input_check_output.json", "url": "/logs/20260527T041823Z_input_check_output.json", "stat": { "exists": true, "is_file": true, "is_dir": false, "size": 673, "mtime_utc": "2026-05-27T04:18:23Z" }, "json_preview": { "ok": true, "mode": "JS8", "tool": "webftr-js8-input-check", "tool_version": "step38-fine-timing-ridge-sweep", "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." } }, "real_run_quick_prefilter": { "name": "20260527T041823Z_real_run_quick_prefilter_output.json", "path": "/decoders/js8_decoder/logs/20260527T041823Z_real_run_quick_prefilter_output.json", "url": "/logs/20260527T041823Z_real_run_quick_prefilter_output.json", "stat": { "exists": true, "is_file": true, "is_dir": false, "size": 8804, "mtime_utc": "2026-05-27T04:18:37Z" }, "json_preview": { "ok": true, "mode": "JS8", "tool": "webftr-js8-quick-window-scan", "tool_version": "step38-fine-timing-ridge-sweep", "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 38." } }, "real_run_dirty_window_scan": { "name": "20260527T041823Z_real_run_dirty_window_scan_output.json", "path": "/decoders/js8_decoder/logs/20260527T041823Z_real_run_dirty_window_scan_output.json", "url": "/logs/20260527T041823Z_real_run_dirty_window_scan_output.json", "stat": { "exists": true, "is_file": true, "is_dir": false, "size": 1223, "mtime_utc": "2026-05-27T04:19:37Z" }, "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/20260527T041823Z_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 38 timeout guard stopped this expensive probe. The real-run now continues with quick-window fallback when available; otherwise inspect stderr/log bundle." } }, "dirty_window_scan": { "name": "20260527T041823Z_real_run_dirty_window_scan_output.json", "path": "/decoders/js8_decoder/logs/20260527T041823Z_real_run_dirty_window_scan_output.json", "url": "/logs/20260527T041823Z_real_run_dirty_window_scan_output.json", "stat": { "exists": true, "is_file": true, "is_dir": false, "size": 1223, "mtime_utc": "2026-05-27T04:19:37Z" }, "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/20260527T041823Z_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 38 timeout guard stopped this expensive probe. The real-run now continues with quick-window fallback when available; otherwise inspect stderr/log bundle." } }, "ldpc_soft_decode": { "name": "20260527T042715Z_ldpc_soft_decode_output.json", "path": "/decoders/js8_decoder/logs/20260527T042715Z_ldpc_soft_decode_output.json", "url": "/logs/20260527T042715Z_ldpc_soft_decode_output.json", "stat": { "exists": true, "is_file": true, "is_dir": false, "size": 45112, "mtime_utc": "2026-05-27T04:28:00Z" }, "json_preview": { "ok": true, "mode": "JS8", "tool": "webftr-js8-soft-ldpc-minsum-probe", "tool_version": "step38-fine-timing-ridge-sweep", "input_wav": null, "candidate_json": "/decoders/js8_decoder/runtime/timing_boundary_sweep/step38_best_timing_fec_candidate.json", "rx_only": true, "safety": { "tx": false, "ptt": false, "tune": false, "send": false, "js8call_runtime_control": false }, "implementation_stage": "step38_bounded_gray_interleaver_llr_minsum_probe_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": 24, "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": 12, "fast_trials": true, "trial_count": 2 }, "candidate_context": { "nsps_used": 6400, "nsps_is_js8_realistic": true, "selected_profile": null, "selected_variant": { "name": "raw_msb_symbol_order", "rank_score": 127.063032, "complete_174bit_candidate": true, "hard_bits_sha256_16": "7bf9bc1895cb1e01", "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 2.265758, "min_abs": 0.020953, "max_abs": 4.126624, "positive": 139, "negative": 35, "zero": 0 } } }, "candidate_mapping_rows": 828, "probe_count": 24, "best_soft_decode": { "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+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" }, "decoder_trial": { "llr_scale": 1.0, "alpha": 0.8 }, "source_rank_score": 109.063032, "source_llr_stats": { "count": 174, "avg_abs": 2.265758, "min_abs": 0.020953, "max_abs": 4.126624, "positive": 139, "negative": 35, "zero": 0 }, "success": false, "iterations_used": 24, "final_syndrome_weight": 22, "message91": null, "message91_sha256_16": "eb0331f827dab374", "codeword174_sha256_16": "89003bf74303e48c", "trace": [ { "iteration": 0, "syndrome_weight": 37 }, { "iteration": 1, "syndrome_weight": 32 }, { "iteration": 2, "syndrome_weight": 30 }, { "iteration": 3, "syndrome_weight": 22 }, { "iteration": 4, "syndrome_weight": 37 }, { "iteration": 5, "syndrome_weight": 51 }, { "iteration": 6, "syndrome_weight": 54 }, { "iteration": 7, "syndrome_weight": 33 }, { "iteration": 8, "syndrome_weight": 49 }, { "iteration": 9, "syndrome_weight": 41 }, { "iteration": 10, "syndrome_weight": 43 }, { "iteration": 15, "syndrome_weight": 41 }, { "iteration": 20, "syndrome_weight": 50 } ] }, "soft_decode_results": [ { "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+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" }, "decoder_trial": { "llr_scale": 1.0, "alpha": 0.8 }, "source_rank_score": 109.063032, "source_llr_stats": { "count": 174, "avg_abs": 2.265758, "min_abs": 0.020953, "max_abs": 4.126624, "positive": 139, "negative": 35, "zero": 0 }, "success": false, "iterations_used": 24, "final_syndrome_weight": 22, "message91": null, "message91_sha256_16": "eb0331f827dab374", "codeword174_sha256_16": "89003bf74303e48c", "trace": [ { "iteration": 0, "syndrome_weight": 37 }, { "iteration": 1, "syndrome_weight": 32 }, { "iteration": 2, "syndrome_weight": 30 }, { "iteration": 3, "syndrome_weight": 22 }, { "iteration": 4, "syndrome_weight": 37 }, { "iteration": 5, "syndrome_weight": 51 }, { "iteration": 6, "syndrome_weight": 54 }, { "iteration": 7, "syndrome_weight": 33 }, { "iteration": 8, "syndrome_weight": 49 }, { "iteration": 9, "syndrome_weight": 41 }, { "iteration": 10, "syndrome_weight": 43 }, { "iteration": 15, "syndrome_weight": 41 }, { "iteration": 20, "syndrome_weight": 50 } ] }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "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 }, "decoder_trial": { "llr_scale": 0.75, "alpha": 0.7 }, "source_rank_score": 107.311136, "source_llr_stats": { "count": 174, "avg_abs": 1.827784, "min_abs": 0.008053, "max_abs": 4.126624, "positive": 138, "negative": 36, "zero": 0 }, "success": false, "iterations_used": 24, "final_syndrome_weight": 27, "message91": null, "message91_sha256_16": "3909d0efb8b5d4f7", "codeword174_sha256_16": "6ab6ae69c2669651", "trace": [ { "iteration": 0, "syndrome_weight": 33 }, { "iteration": 1, "syndrome_weight": 32 }, { "iteration": 2, "syndrome_weight": 39 }, { "iteration": 3, "syndrome_weight": 43 }, { "iteration": 4, "syndrome_weight": 39 }, { "iteration": 5, "syndrome_weight": 49 }, { "iteration": 6, "syndrome_weight": 41 }, { "iteration": 7, "syndrome_weight": 44 }, { 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"iteration": 4, "syndrome_weight": 37 }, { "iteration": 5, "syndrome_weight": 40 }, { "iteration": 6, "syndrome_weight": 33 }, { "iteration": 7, "syndrome_weight": 46 }, { "iteration": 8, "syndrome_weight": 44 }, { "iteration": 9, "syndrome_weight": 43 }, { "iteration": 10, "syndrome_weight": 44 }, { "iteration": 15, "syndrome_weight": 49 }, { "iteration": 20, "syndrome_weight": 44 } ] }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+no_interleaver", "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 }, "decoder_trial": { "llr_scale": 1.0, "alpha": 0.8 }, "source_rank_score": 107.529872, "source_llr_stats": { "count": 174, "avg_abs": 1.882468, "min_abs": 0.003299, "max_abs": 4.126624, "positive": 148, "negative": 26, "zero": 0 }, "success": false, "iterations_used": 24, "final_syndrome_weight": 33, "message91": null, "message91_sha256_16": "1512a470c93c7bb5", "codeword174_sha256_16": "6d04c779ce0fc894", "trace": [ { "iteration": 0, "syndrome_weight": 48 }, { "iteration": 1, "syndrome_weight": 38 }, { "iteration": 2, "syndrome_weight": 47 }, { "iteration": 3, "syndrome_weight": 43 }, { "iteration": 4, "syndrome_weight": 49 }, { "iteration": 5, "syndrome_weight": 46 }, { "iteration": 6, "syndrome_weight": 36 }, { "iteration": 7, "syndrome_weight": 35 }, { "iteration": 8, "syndrome_weight": 39 }, { "iteration": 9, "syndrome_weight": 47 }, { "iteration": 10, "syndrome_weight": 45 }, { "iteration": 15, "syndrome_weight": 41 }, { "iteration": 20, "syndrome_weight": 40 } ] }, { "variant": "reverse_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" }, "decoder_trial": { "llr_scale": 0.75, "alpha": 0.7 }, "source_rank_score": 113.063032, "source_llr_stats": { "count": 174, "avg_abs": 2.265758, "min_abs": 0.020953, "max_abs": 4.126624, "positive": 139, "negative": 35, "zero": 0 }, "success": false, "iterations_used": 24, "final_syndrome_weight": 34, "message91": null, "message91_sha256_16": "9840b53bd4cff7c6", "codeword174_sha256_16": "0f3fddb5ca7ce9c3", "trace": [ { "iteration": 0, "syndrome_weight": 42 }, { "iteration": 1, "syndrome_weight": 42 }, { "iteration": 2, "syndrome_weight": 42 }, { "iteration": 3, "syndrome_weight": 45 }, { "iteration": 4, "syndrome_weight": 37 }, { "iteration": 5, "syndrome_weight": 45 }, { "iteration": 6, "syndrome_weight": 43 }, { "iteration": 7, "syndrome_weight": 43 }, { "iteration": 8, "syndrome_weight": 35 }, { "iteration": 9, "syndrome_weight": 40 }, { "iteration": 10, "syndrome_weight": 39 }, { "iteration": 15, "syndrome_weight": 42 }, { "iteration": 20, "syndrome_weight": 39 } ] }, { "variant": "mapped_raw_msb+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" }, "decoder_trial": { "llr_scale": 1.0, "alpha": 0.8 }, "source_rank_score": 109.063032, "source_llr_stats": { "count": 174, "avg_abs": 2.265758, "min_abs": 0.020953, "max_abs": 4.126624, "positive": 139, "negative": 35, "zero": 0 }, "success": false, "iterations_used": 24, "final_syndrome_weight": 34, "message91": null, "message91_sha256_16": "07985c5b49461190", "codeword174_sha256_16": "c148a530d15360d5", "trace": [ { "iteration": 0, "syndrome_weight": 42 }, { "iteration": 1, "syndrome_weight": 39 }, { "iteration": 2, "syndrome_weight": 35 }, { "iteration": 3, "syndrome_weight": 43 }, { "iteration": 4, "syndrome_weight": 38 }, { "iteration": 5, "syndrome_weight": 37 }, { "iteration": 6, "syndrome_weight": 41 }, { "iteration": 7, "syndrome_weight": 43 }, { "iteration": 8, "syndrome_weight": 46 }, { "iteration": 9, "syndrome_weight": 38 }, { "iteration": 10, "syndrome_weight": 34 }, { "iteration": 15, "syndrome_weight": 36 }, { "iteration": 20, "syndrome_weight": 40 } ] } ], "decodes": [], "outputs": { "ldpc_soft_decode_json": "/decoders/js8_decoder/runtime/ldpc_soft_decode/step38_ldpc_soft_decode.json" }, "warnings": [ "Step 38 runs bounded normalized-min-sum soft LDPC over the best-ranked FT8-style Gray/interleaver mapping candidates against the public (174,91) matrix contract.", "This still does not unpack JS8 text or validate CRC/message payloads.", "If success is true and syndrome_weight is 0, the next step can unpack the 91-bit message. Otherwise more timing, Costas/data-symbol boundary, deinterleaver/order or LLR tuning is required." ], "next_action": "Upload Step35 logs. If no valid codeword, inspect best mapping_meta/final_syndrome_weight and continue timing/interleaver/LLR tuning; if valid, add JS8 message unpack/CRC." } }, "ldpc_matrix_probe": { "name": "20260527T042712Z_ldpc_matrix_probe_output.json", "path": "/decoders/js8_decoder/logs/20260527T042712Z_ldpc_matrix_probe_output.json", "url": "/logs/20260527T042712Z_ldpc_matrix_probe_output.json", "stat": { "exists": true, "is_file": true, "is_dir": false, "size": 35797, "mtime_utc": "2026-05-27T04:27:14Z" }, "json_preview": { "ok": true, "mode": "JS8", "tool": "webftr-js8-real-ldpc-matrix-syndrome-probe", "tool_version": "step38-fine-timing-ridge-sweep", "input_wav": null, "candidate_json": "/decoders/js8_decoder/runtime/timing_boundary_sweep/step38_best_timing_fec_candidate.json", "rx_only": true, "safety": { "tx": false, "ptt": false, "tune": false, "send": false, "js8call_runtime_control": false }, "implementation_stage": "step38_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": 828, "max_rows": 72, "repair_rows": 10, "max_flips": 6, "candidate_pool": 12 }, "candidate_context": { "nsps_used": 6400, "nsps_is_js8_realistic": true, "selected_profile": null, "selected_variant": { "name": "raw_msb_symbol_order", "rank_score": 127.063032, "complete_174bit_candidate": true, "hard_bits_sha256_16": "7bf9bc1895cb1e01", "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 2.265758, "min_abs": 0.020953, "max_abs": 4.126624, "positive": 139, "negative": 35, "zero": 0 } } }, "variant_probe_count": 72, "best_matrix_probe": { "variant": "mapped_ft8_gray_alt_high_demap_msb_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" }, "hard_weight_174": 140, "llr_avg_abs": 1.8277836149425295, "syndrome": { "bits_len": 174, "message91": "1011100111111101111111111111011111111101110111101011001111101011111010111111111011101111111", "parity83_observed": "11001100111111111110111110101111111111111011101111101111101101011001111111110101111", "parity83_expected": "11110110111110110111011110100100001110111011100111101100100101011101111111100100101", "syndrome83": "00111010000001001001100000001011110001000000001000000011001000000100000000010001010", "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "67b59638aa8882d6", "codeword174_sha256_16": "0228efbd612c9092" }, "repair": { "attempted": true, "max_flips": 6, "candidate_pool": 12, "flip_count": 2, "repair_success": false, "final_syndrome_weight": 20, "trace": [ { "flip_index": 128, "llr_abs": 0.032754, "gain": 1, "syndrome_weight_after": 21 }, { "flip_index": 156, "llr_abs": 0.081417, "gain": 1, "syndrome_weight_after": 20 } ], "repaired_message91_sha256_16": "67b59638aa8882d6" } }, "all_matrix_probes": [ { "variant": "mapped_ft8_gray_alt_high_demap_msb_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" }, "hard_weight_174": 140, "llr_avg_abs": 1.8277836149425295, "syndrome": { "bits_len": 174, "message91": "1011100111111101111111111111011111111101110111101011001111101011111010111111111011101111111", "parity83_observed": "11001100111111111110111110101111111111111011101111101111101101011001111111110101111", "parity83_expected": "11110110111110110111011110100100001110111011100111101100100101011101111111100100101", "syndrome83": "00111010000001001001100000001011110001000000001000000011001000000100000000010001010", "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "67b59638aa8882d6", "codeword174_sha256_16": "0228efbd612c9092" }, "repair": { "attempted": true, "max_flips": 6, "candidate_pool": 12, "flip_count": 2, "repair_success": false, "final_syndrome_weight": 20, "trace": [ { "flip_index": 128, "llr_abs": 0.032754, "gain": 1, "syndrome_weight_after": 21 }, { "flip_index": 156, "llr_abs": 0.081417, "gain": 1, "syndrome_weight_after": 20 } ], "repaired_message91_sha256_16": "67b59638aa8882d6" } }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "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 }, "hard_weight_174": 35, "llr_avg_abs": 1.5912117011494256, "syndrome": { "bits_len": 174, "message91": "0011000011000000001110000100000000010000000100010010100010000000100000000000110000000010000", "parity83_observed": "00100001110100000001000000000000001000000010001010110000000000000001000001100011000", "parity83_expected": "00110001110111100010100000001100011010000011001000110100001101010101011100100011110", "syndrome83": "00010000000011100011100000001100010010000001000010000100001101010100011101000000110", "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "4f673c96b1f1de5c", "codeword174_sha256_16": "90bdd003a67ea079" }, "repair": { "attempted": true, "max_flips": 6, "candidate_pool": 12, "flip_count": 3, "repair_success": false, "final_syndrome_weight": 22, "trace": [ { "flip_index": 105, "llr_abs": 0.008127, "gain": 1, "syndrome_weight_after": 24 }, { "flip_index": 149, "llr_abs": 0.012692, "gain": 1, "syndrome_weight_after": 23 }, { "flip_index": 139, "llr_abs": 0.045014, "gain": 1, "syndrome_weight_after": 22 } ], "repaired_message91_sha256_16": "4f673c96b1f1de5c" } }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+no_interleaver", "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 }, "hard_weight_174": 36, "llr_avg_abs": 1.6427796724137933, "syndrome": { "bits_len": 174, "message91": "0011000011000000001110000100000000010000000100010010100010000000100000000000110000000010000", "parity83_observed": "00100001110100000001000000000000001000000010001010110000010000000001000001100011000", "parity83_expected": "00110001110111100010100000001100011010000011001000110100001101010101011100100011110", "syndrome83": "00010000000011100011100000001100010010000001000010000100011101010100011101000000110", "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "4f673c96b1f1de5c", "codeword174_sha256_16": "eb17c3d482c6c1fa" }, "repair": { "attempted": true, "max_flips": 6, "candidate_pool": 12, "flip_count": 3, "repair_success": false, "final_syndrome_weight": 23, "trace": [ { "flip_index": 105, "llr_abs": 0.003612, "gain": 1, "syndrome_weight_after": 25 }, { "flip_index": 149, "llr_abs": 0.013947, "gain": 1, "syndrome_weight_after": 24 }, { "flip_index": 148, "llr_abs": 0.032127, "gain": 1, "syndrome_weight_after": 23 } ], "repaired_message91_sha256_16": "4f673c96b1f1de5c" } }, { "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+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" }, "hard_weight_174": 127, "llr_avg_abs": 1.672409804597702, "syndrome": { "bits_len": 174, "message91": "0111101111111111110100111110001110111111010111100011111110111111100110101111101000101111111", "parity83_observed": "11111011100110111011001111111001111010001111001111011101111111110001010111111110111", "parity83_expected": "01111011100011100001010001101001111010000011001100011101011101100001000101110101100", "syndrome83": "10000000000101011010011110010000000000001100000011000000100010010000010010001011011", "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "6a76c3f6f4855f72", "codeword174_sha256_16": "e94fe0f75c74d230" }, "repair": { "attempted": true, "max_flips": 6, "candidate_pool": 12, "flip_count": 1, "repair_success": false, "final_syndrome_weight": 24, "trace": [ { "flip_index": 104, "llr_abs": 0.094637, "gain": 1, "syndrome_weight_after": 24 } ], "repaired_message91_sha256_16": "6a76c3f6f4855f72" } }, { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "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" }, "hard_weight_174": 138, "llr_avg_abs": 2.2657583620689654, "syndrome": { "bits_len": 174, "message91": "1111111010101111101101111100111011001101001111101111101111100111111111111111110011111111110", "parity83_observed": "10011110011111111011110111111111111110110100111111111100101111111110111111110110111", "parity83_expected": "10000101010110110001001111110001110100111100011111111101101010100100001111100000011", "syndrome83": "00011011001001001010111000001110001010001000100000000001000101011010110000010110100", "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "d5fd881ddc0d6fa3", "codeword174_sha256_16": "524f6b31360d4b54" }, "repair": { "attempted": true, "max_flips": 6, "candidate_pool": 12, "flip_count": 3, "repair_success": false, "final_syndrome_weight": 27, "trace": [ { "flip_index": 98, "llr_abs": 0.093616, "gain": 1, "syndrome_weight_after": 29 }, { "flip_index": 155, "llr_abs": 0.114756, "gain": 1, "syndrome_weight_after": 28 }, { "flip_index": 95, "llr_abs": 0.157374, "gain": 1, "syndrome_weight_after": 27 } ], "repaired_message91_sha256_16": "d5fd881ddc0d6fa3" } }, { "variant": "lab_mask_xor_preview", "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" }, "hard_weight_174": 83, "llr_avg_abs": 1.8824677988505754, "syndrome": { "bits_len": 174, "message91": "0001110001101100000000011000100010001100000100111011101100100100111000010101001001011011111", "parity83_observed": "00000110001010100101101111010111010101101010110111110100010110101001110010111000011", "parity83_expected": "00011100100111010101111101000101100000001011110111000100010010101110111011100000011", "syndrome83": "00011010101101110000010010010010110101100001000000110000000100000111001001011000000", "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "e3f175dd3a2c81b2", "codeword174_sha256_16": "d5da07ca10be5a38" }, "repair": { "attempted": true, "max_flips": 6, "candidate_pool": 12, "flip_count": 1, "repair_success": false, "final_syndrome_weight": 28, "trace": [ { "flip_index": 105, "llr_abs": 0.056699, "gain": 1, "syndrome_weight_after": 28 } ], "repaired_message91_sha256_16": "e3f175dd3a2c81b2" } }, { "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", "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 }, "hard_weight_174": 47, "llr_avg_abs": 1.7130608850574711, "syndrome": { "bits_len": 174, "message91": "1011100001010001001001000001000000101010110000000010000110000000001000100000011000100000000", "parity83_observed": "01000000000010010110000010000000110001000100011010110000011100011000000101010000100", "parity83_expected": "10000010000011010111011000001000001110000100111011101010111000000001010000111001100", "syndrome83": "11000010000001000001011010001000111111000000100001011010100100011001010101101001000", "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "10bccbb21b243c70", "codeword174_sha256_16": "3d241f2dee27cf8a" }, "repair": { "attempted": true, "max_flips": 6, "candidate_pool": 12, "flip_count": 3, "repair_success": false, "final_syndrome_weight": 28, "trace": [ { "flip_index": 164, "llr_abs": 0.039513, "gain": 1, "syndrome_weight_after": 30 }, { "flip_index": 124, "llr_abs": 0.054434, "gain": 1, "syndrome_weight_after": 29 }, { "flip_index": 135, "llr_abs": 0.099006, "gain": 1, "syndrome_weight_after": 28 } ], "repaired_message91_sha256_16": "10bccbb21b243c70" } }, { "variant": "reverse_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" }, "hard_weight_174": 121, "llr_avg_abs": 1.8824677988505747, "syndrome": { "bits_len": 174, "message91": "1111110011111111111111111111000011110100010100011110101111110010011111101010011111111111111", "parity83_observed": "10101111001001111111111001111001010111001111111001100000001111001111111001111111001", "parity83_expected": "00001110001100001011010101010000011111000101111001101010000010000011001011001001001", "syndrome83": "10100001000101110100101100101001001000001010000000001010001101001100110010110110000", "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "b5db807c301847ac", "codeword174_sha256_16": "eaf8f2e0f46bfa41" }, "repair": { "attempted": true, "max_flips": 6, "candidate_pool": 12, "flip_count": 1, "repair_success": false, "final_syndrome_weight": 30, "trace": [ { "flip_index": 145, "llr_abs": 0.035267, "gain": 1, "syndrome_weight_after": 30 } ], "repaired_message91_sha256_16": "b5db807c301847ac" } }, { "variant": "reverse_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" }, "hard_weight_174": 123, "llr_avg_abs": 1.8277836149425288, "syndrome": { "bits_len": 174, "message91": "1111110011111111111111111111000011110100010100011110101111110010011111101010011111111111111", "parity83_observed": "10101111001001111111111001111001010111001111111001100011001111001111111001111111001", "parity83_expected": "00001110001100001011010101010000011111000101111001101010000010000011001011001001001", "syndrome83": "10100001000101110100101100101001001000001010000000001001001101001100110010110110000", "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "b5db807c301847ac", "codeword174_sha256_16": "3bc0238a33865be3" }, "repair": { "attempted": true, "max_flips": 6, "candidate_pool": 12, "flip_count": 1, "repair_success": false, "final_syndrome_weight": 30, "trace": [ { "flip_index": 146, "llr_abs": 0.032754, "gain": 1, "syndrome_weight_after": 30 } ], "repaired_message91_sha256_16": "b5db807c301847ac" } }, { "variant": "reverse_full_bitstream", "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" }, "hard_weight_174": 121, "llr_avg_abs": 1.7194752988505742, "syndrome": { "bits_len": 174, "message91": "1111110011111111111111111111000011110100010100011110101111110010011111101010011111111111111", "parity83_observed": "10101111001001111111111001111001010111001111111001100000001111001111111001111111001", "parity83_expected": "00001110001100001011010101010000011111000101111001101010000010000011001011001001001", "syndrome83": "10100001000101110100101100101001001000001010000000001010001101001100110010110110000", "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "b5db807c301847ac", "codeword174_sha256_16": "eaf8f2e0f46bfa41" }, "repair": { "attempted": true, "max_flips": 6, "candidate_pool": 12, "flip_count": 1, "repair_success": false, "final_syndrome_weight": 30, "trace": [ { "flip_index": 145, "llr_abs": 0.051749, "gain": 1, "syndrome_weight_after": 30 } ], "repaired_message91_sha256_16": "b5db807c301847ac" } }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "lsb_within_each_tone+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none", "polarity": "inverted" }, "hard_weight_174": 123, "llr_avg_abs": 1.6647911149425294, "syndrome": { "bits_len": 174, "message91": "1001111111001111111001111001100011001111111001110101001111001111111111001001111010111111111", "parity83_observed": "11111100101011111100100111111010111100010100010111100001111111111111111111100111111", "parity83_expected": "11101110101001100110010101111011101101010010100101100111001100101100011111101010011", "syndrome83": "00010010000010011010110010000001010001000110110010000110110011010011100000001101100", "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "ea3829fd4a89c4a1", "codeword174_sha256_16": "8aeb2df4b6f868f0" }, "repair": { "attempted": false, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 31, "trace": [], "repaired_message91_sha256_16": "ea3829fd4a89c4a1" } }, { "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 }, "hard_weight_174": 51, "llr_avg_abs": 1.6647911149425283, "syndrome": { "bits_len": 174, "message91": "0000000110100100001100000111100100001000100110100000111010000000000001101100010000000110100", "parity83_observed": "00000101010001000110010000000110010010101010101000100110010000001000000000010100000", "parity83_expected": "00000100110001000100010000010111111111001001001000101011100100110001110100100110011", "syndrome83": "00000001100000000010000000010001101101100011100000001101110100111001110100110010011", "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "7289260856bf46ac", "codeword174_sha256_16": "52fd9adeb14097f4" }, "repair": { "attempted": false, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 31, "trace": [], "repaired_message91_sha256_16": "7289260856bf46ac" } }, { "variant": "reverse_full_bitstream", "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" }, "hard_weight_174": 123, "llr_avg_abs": 1.664791114942528, "syndrome": { "bits_len": 174, "message91": "1111110011111111111111111111000011110100010100011110101111110010011111101010011111111111111", "parity83_observed": "10101111001001111111111001111001010111001111111001100011001111001111111001111111001", "parity83_expected": "00001110001100001011010101010000011111000101111001101010000010000011001011001001001", "syndrome83": "10100001000101110100101100101001001000001010000000001001001101001100110010110110000", "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "b5db807c301847ac", "codeword174_sha256_16": "3bc0238a33865be3" }, "repair": { "attempted": false, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 31, "trace": [], "repaired_message91_sha256_16": "b5db807c301847ac" } }, { "variant": "mapped_raw_msb+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" }, "hard_weight_174": 51, "llr_avg_abs": 1.613219333333333, "syndrome": { "bits_len": 174, "message91": "1100011100010000001000000000000001100000000111101100111100000000110000000111010010001100000", "parity83_observed": "00001110010001000110000000000000110000000011110011010000011000000000000110001101000", "parity83_expected": "00011100001101101101100000011010010000001110110001111100011011111001010111011111000", "syndrome83": "00010010011100101011100000011010100000001101000010101100000011111001010001010010000", "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "6b88dc9388d32ed9", "codeword174_sha256_16": "80e4ac873aa43e30" }, "repair": { "attempted": false, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 31, "trace": [], "repaired_message91_sha256_16": "6b88dc9388d32ed9" } }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_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 }, "hard_weight_174": 61, "llr_avg_abs": 1.0715886954022988, "syndrome": { "bits_len": 174, "message91": "0000101000010000000010100010011010001001010110011010001000010100110001101101011100110010100", "parity83_observed": "10000101011110000010010010011000111010100100000000100000101000000011010001100000001", "parity83_expected": "10000101100000110010010100010000110011100100101101110011110010011110011001001100000", "syndrome83": "00000000111110110000000110001000001001000000101101010011011010011101001000101100001", "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "8b19ee60d2508d5d", "codeword174_sha256_16": "d8393894fe20b24f" }, "repair": { "attempted": false, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 31, "trace": [], "repaired_message91_sha256_16": "8b19ee60d2508d5d" } }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "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" }, "hard_weight_174": 138, "llr_avg_abs": 1.8824677988505751, "syndrome": { "bits_len": 174, "message91": "1011111111110111111111101111101001111110011111111011111111011111110110111111000110110110111", "parity83_observed": "10111011110011011101011111101111111100011101111101111111111101111101101111100111111", "parity83_expected": "00001011000010010101101111011000011100001000101101111110111000110100001001100010000", "syndrome83": "10110000110001001000110000110111100000010101010000000001000101001001100110000101111", "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "08a9bfa00a31c778", "codeword174_sha256_16": "96c35e2c35fea733" }, "repair": { "attempted": false, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 32, "trace": [], "repaired_message91_sha256_16": "08a9bfa00a31c778" } }, { "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_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" }, "hard_weight_174": 116, "llr_avg_abs": 1.1495715689655168, "syndrome": { "bits_len": 174, "message91": "0100110111111110011101100111101111111110111111111010101111101100001100011101101010110110111", "parity83_observed": "11101110011111101010111000111011101111100111101110100111000101110101110011100001011", "parity83_expected": "00000100001011010011000010111000000101100101101011100000001011111101110111100000011", "syndrome83": "11101010010100111001111010000011101010000010000101000111001110001000000100000001000", "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "1661d9e1acea61ee", "codeword174_sha256_16": "419192bccb8097ba" }, "repair": { "attempted": false, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 32, "trace": [], "repaired_message91_sha256_16": "1661d9e1acea61ee" } }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_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" }, "hard_weight_174": 58, "llr_avg_abs": 1.1495715689655162, "syndrome": { "bits_len": 174, "message91": "1101000001010110100001000001100110000010000000010011000110110000100010110000001100000011011", "parity83_observed": "00011001101001001001100000000011001000000110001010000011011000011000000000011101001", "parity83_expected": "01011100010110000000110101000010111110000000011010011101011100111100000101011111001", "syndrome83": "01000101111111001001010101000001110110000110010000011110000100100100000101000010000", "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "caa2056a7c81f96b", "codeword174_sha256_16": "67b40f73f62e6c6c" }, "repair": { "attempted": false, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 32, "trace": [], "repaired_message91_sha256_16": "caa2056a7c81f96b" } }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_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": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "hard_weight_174": 72, "llr_avg_abs": 1.111334712643677, "syndrome": { "bits_len": 174, "message91": "1011001000100011100010111000010100000001010000000101010000010011110011101010010101001011000", "parity83_observed": "00010011100000010111000111010100010000011000010001011000111110001110101100011110101", "parity83_expected": "10111011100110111110110010011001100000101001000010010000110011001100101000110100101", "syndrome83": "10101000000110101001110101001101110000110001010011001000001101000010000100101010000", "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "d4921afbac24d4a4", "codeword174_sha256_16": "79422d22b91abac9" }, "repair": { "attempted": false, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 32, "trace": [], "repaired_message91_sha256_16": "d4921afbac24d4a4" } }, { "variant": "lab_mask_xor_preview", "transform": "raw_msb+no_interleaver", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none" }, "hard_weight_174": 89, "llr_avg_abs": 2.265758362068966, "syndrome": { "bits_len": 174, "message91": "1010001100100101001100011101000000011010101101101111000001111110001111101010010000111001011", "parity83_observed": "00100101110110001000101010111001110111011010010101011001100111101101000010100011111", "parity83_expected": "00101010110011010101011010010100110101011100010100111010100101100011100111000001011", "syndrome83": "00001111000101011101110000101101000010000110000001100011000010001110100101100010100", "syndrome_weight": 33, "valid_codeword_hard_decision": false, "message91_sha256_16": "39d180b9ca8fad49", "codeword174_sha256_16": "beedf9942d4dbcbb" }, "repair": { "attempted": false, "flip_count": 0, "repair_success": false, "final_syndrome_weight": 33, "trace": [], "repaired_message91_sha256_16": "39d180b9ca8fad49" } } ], "decodes": [], "outputs": { "ldpc_matrix_probe_json": "/decoders/js8_decoder/runtime/ldpc_matrix_probe/step38_ldpc_matrix_probe.json" }, "warnings": [ "Step 38 keeps the Step 38 Gray/interleaver probe but ranks all mappings first and repairs only the best 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": "20260527T041823Z_real_run_candidate_export_output.json", "path": "/decoders/js8_decoder/logs/20260527T041823Z_real_run_candidate_export_output.json", "url": "/logs/20260527T041823Z_real_run_candidate_export_output.json", "stat": { "exists": true, "is_file": true, "is_dir": false, "size": 99102, "mtime_utc": "2026-05-27T04:25:26Z" }, "json_preview": { "ok": true, "mode": "JS8", "tool": "webftr-js8-fec-candidate-export", "tool_version": "step38-fine-timing-ridge-sweep", "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": "step38_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/20260527T041823Z_real_run_profile_scan_output.json", "anchor_json": "/decoders/js8_decoder/logs/20260527T041823Z_real_run_auto_ldpc_probe_output.json", "anchor_selection": { "source": "profile_scan_json", "path": "/decoders/js8_decoder/logs/20260527T041823Z_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/20260527T041823Z_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, 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"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 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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 38 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": "20260527T041823Z_real_run_timing_boundary_sweep_output.json", "path": "/decoders/js8_decoder/logs/20260527T041823Z_real_run_timing_boundary_sweep_output.json", "url": "/logs/20260527T041823Z_real_run_timing_boundary_sweep_output.json", "stat": { "exists": true, "is_file": true, "is_dir": false, "size": 144680, "mtime_utc": "2026-05-27T04:27:12Z" }, "json_preview": { "ok": true, "mode": "JS8", "tool": "webftr-js8-timing-boundary-candidate-sweep", "tool_version": "step38-fine-timing-ridge-sweep", "input_wav": "/decoders/js8_decoder/runtime/quick_prefilter_windows/js8_quick_selected_window.wav", "profile_scan_json": "/decoders/js8_decoder/logs/20260527T041823Z_real_run_profile_scan_output.json", "anchor_json": "/decoders/js8_decoder/logs/20260527T041823Z_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": "step38_timing_boundary_syndrome_sweep_no_message_unpack", "anchor_selection": { "source": "profile_scan_json", "path": "/decoders/js8_decoder/logs/20260527T041823Z_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 }, "sweep_grid": { "start_offsets_s": [ 0.0, 0.06, 0.12, 0.18, 0.24, 0.3, 0.36 ], "base_freq_offsets_hz": [ 3.0, 3.5, 4.0, 4.5, 5.0 ], "tone_spacing_offsets_hz": [ 0.0, -0.03, 0.03 ], "max_combinations": 30, "actual_combinations": 30 }, "decode_found": false, "best_final_syndrome_weight": 22, "best_candidate": { "combination_index": 18, "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": 1.905, "nsps": 6400 }, "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": 1.905, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:18" }, "best_row": { "variant": "mapped_ft8_gray_alt_high_demap_msb_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": 140, "llr_stats": { "count": 174, "avg_abs": 1.827784, "min_abs": 0.008053, "max_abs": 4.126624, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 107.311136, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "67b59638aa8882d6", "codeword174_sha256_16": "0228efbd612c9092" }, "top_rows": [ { "variant": "mapped_ft8_gray_alt_high_demap_msb_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": 140, "llr_stats": { "count": 174, "avg_abs": 1.827784, "min_abs": 0.008053, "max_abs": 4.126624, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 107.311136, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "67b59638aa8882d6", "codeword174_sha256_16": "0228efbd612c9092" }, { "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+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": 127, "llr_stats": { "count": 174, "avg_abs": 1.67241, "min_abs": 0.015278, "max_abs": 4.092886, "positive": 43, "negative": 131, "zero": 0 }, "source_rank_score": 106.68964, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "6a76c3f6f4855f72", "codeword174_sha256_16": "e94fe0f75c74d230" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "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": 35, "llr_stats": { "count": 174, "avg_abs": 1.591212, "min_abs": 0.003661, "max_abs": 4.126624, "positive": 139, "negative": 35, "zero": 0 }, "source_rank_score": 106.364848, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "4f673c96b1f1de5c", "codeword174_sha256_16": "90bdd003a67ea079" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+no_interleaver", "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": 36, "llr_stats": { "count": 174, "avg_abs": 1.64278, "min_abs": 0.002394, "max_abs": 4.126624, "positive": 148, "negative": 26, "zero": 0 }, "source_rank_score": 106.57112, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "4f673c96b1f1de5c", "codeword174_sha256_16": "eb17c3d482c6c1fa" }, { "variant": "lab_mask_xor_preview", "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": 83, "llr_stats": { "count": 174, "avg_abs": 1.882468, "min_abs": 0.003299, "max_abs": 4.126624, "positive": 26, "negative": 148, "zero": 0 }, "source_rank_score": 99.529872, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "e3f175dd3a2c81b2", "codeword174_sha256_16": "d5da07ca10be5a38" }, { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "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": 138, "llr_stats": { "count": 174, "avg_abs": 2.265758, "min_abs": 0.020953, "max_abs": 4.126624, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 109.063032, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "d5fd881ddc0d6fa3", "codeword174_sha256_16": "524f6b31360d4b54" }, { "variant": "reverse_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": 121, "llr_stats": { "count": 174, "avg_abs": 1.882468, "min_abs": 0.003299, "max_abs": 4.126624, "positive": 26, "negative": 148, "zero": 0 }, "source_rank_score": 111.529872, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "b5db807c301847ac", "codeword174_sha256_16": "eaf8f2e0f46bfa41" }, { "variant": "reverse_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": 123, "llr_stats": { "count": 174, "avg_abs": 1.827784, "min_abs": 0.008053, "max_abs": 4.126624, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 111.311136, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "b5db807c301847ac", "codeword174_sha256_16": "3bc0238a33865be3" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 18, "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": 1.905, "nsps": 6400 }, "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": 1.905, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:18" }, "best_row": { "variant": "mapped_ft8_gray_alt_high_demap_msb_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": 140, "llr_stats": { "count": 174, "avg_abs": 1.827784, "min_abs": 0.008053, "max_abs": 4.126624, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 107.311136, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "67b59638aa8882d6", "codeword174_sha256_16": "0228efbd612c9092" }, "top_rows": [ { "variant": "mapped_ft8_gray_alt_high_demap_msb_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": 140, "llr_stats": { "count": 174, "avg_abs": 1.827784, "min_abs": 0.008053, "max_abs": 4.126624, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 107.311136, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "67b59638aa8882d6", "codeword174_sha256_16": "0228efbd612c9092" }, { "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+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": 127, "llr_stats": { "count": 174, "avg_abs": 1.67241, "min_abs": 0.015278, "max_abs": 4.092886, "positive": 43, "negative": 131, "zero": 0 }, "source_rank_score": 106.68964, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "6a76c3f6f4855f72", "codeword174_sha256_16": "e94fe0f75c74d230" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "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": 35, "llr_stats": { "count": 174, "avg_abs": 1.591212, "min_abs": 0.003661, "max_abs": 4.126624, "positive": 139, "negative": 35, "zero": 0 }, "source_rank_score": 106.364848, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "4f673c96b1f1de5c", "codeword174_sha256_16": "90bdd003a67ea079" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+no_interleaver", "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": 36, "llr_stats": { "count": 174, "avg_abs": 1.64278, "min_abs": 0.002394, "max_abs": 4.126624, "positive": 148, "negative": 26, "zero": 0 }, "source_rank_score": 106.57112, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "4f673c96b1f1de5c", "codeword174_sha256_16": "eb17c3d482c6c1fa" }, { "variant": "lab_mask_xor_preview", "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": 83, "llr_stats": { "count": 174, "avg_abs": 1.882468, "min_abs": 0.003299, "max_abs": 4.126624, "positive": 26, "negative": 148, "zero": 0 }, "source_rank_score": 99.529872, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "e3f175dd3a2c81b2", "codeword174_sha256_16": "d5da07ca10be5a38" }, { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "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": 138, "llr_stats": { "count": 174, "avg_abs": 2.265758, "min_abs": 0.020953, "max_abs": 4.126624, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 109.063032, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "d5fd881ddc0d6fa3", "codeword174_sha256_16": "524f6b31360d4b54" }, { "variant": "reverse_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": 121, "llr_stats": { "count": 174, "avg_abs": 1.882468, "min_abs": 0.003299, "max_abs": 4.126624, "positive": 26, "negative": 148, "zero": 0 }, "source_rank_score": 111.529872, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "b5db807c301847ac", "codeword174_sha256_16": "eaf8f2e0f46bfa41" }, { "variant": "reverse_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": 123, "llr_stats": { "count": 174, "avg_abs": 1.827784, "min_abs": 0.008053, "max_abs": 4.126624, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 111.311136, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "b5db807c301847ac", "codeword174_sha256_16": "3bc0238a33865be3" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 15, "offsets": { "start_offset_s": 0.0, "base_freq_offset_hz": 5.0, "tone_spacing_offset_hz": 0.03 }, "anchor_applied": { "start_seconds": 4.8, "base_freq_hz": 1030.0, "tone_spacing_hz": 1.905, "nsps": 6400 }, "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": 1030.0, "tone_spacing_hz": 1.905, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:15" }, "best_row": { "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": 84, "llr_stats": { "count": 174, "avg_abs": 1.566292, "min_abs": 0.008625, "max_abs": 3.871059, "positive": 46, "negative": 128, "zero": 0 }, "source_rank_score": 98.265168, "syndrome_weight": 24, "valid_codeword_hard_decision": false, "message91_sha256_16": "15da00dc0c187968", "codeword174_sha256_16": "a34efb83ad21097f" }, "top_rows": [ { "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": 84, "llr_stats": { "count": 174, "avg_abs": 1.566292, "min_abs": 0.008625, "max_abs": 3.871059, "positive": 46, "negative": 128, "zero": 0 }, "source_rank_score": 98.265168, "syndrome_weight": 24, "valid_codeword_hard_decision": false, "message91_sha256_16": "15da00dc0c187968", "codeword174_sha256_16": "a34efb83ad21097f" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "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": 46, "llr_stats": { "count": 174, "avg_abs": 1.251631, "min_abs": 0.005541, "max_abs": 4.032212, "positive": 128, "negative": 46, "zero": 0 }, "source_rank_score": 105.006524, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "ff55f5e7dbb755af", "codeword174_sha256_16": "46f8b82ab21340e3" }, { "variant": "mapped_raw_msb+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": 125, "llr_stats": { "count": 174, "avg_abs": 1.553047, "min_abs": 0.04156, "max_abs": 3.744241, "positive": 49, "negative": 125, "zero": 0 }, "source_rank_score": 106.212188, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "0a664839a51e9f34", "codeword174_sha256_16": "299293d8b8d7026b" }, { "variant": "mapped_ft8_gray_primary_demap_msb_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": 123, "llr_stats": { "count": 174, "avg_abs": 1.285799, "min_abs": 0.003321, "max_abs": 3.744241, "positive": 50, "negative": 124, "zero": 0 }, "source_rank_score": 105.143196, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "afefdb2bc335171d", "codeword174_sha256_16": "67c8c6e096cb6235" }, { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "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": 52, "llr_stats": { "count": 174, "avg_abs": 1.562515, "min_abs": 0.033601, "max_abs": 4.042898, "positive": 122, "negative": 52, "zero": 0 }, "source_rank_score": 106.25006, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "555090f944023a0c", "codeword174_sha256_16": "3d0eb40db86bb238" }, { "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_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": 64, "llr_stats": { "count": 174, "avg_abs": 1.045094, "min_abs": 0.005438, "max_abs": 3.871059, "positive": 110, "negative": 64, "zero": 0 }, "source_rank_score": 104.180376, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "83306fbbd73e8853", "codeword174_sha256_16": "366e3c1a45351d5b" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "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": 137, "llr_stats": { "count": 174, "avg_abs": 1.540017, "min_abs": 0.006373, "max_abs": 4.032212, "positive": 43, "negative": 131, "zero": 0 }, "source_rank_score": 106.160068, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "48e4ec60a6d27f12", "codeword174_sha256_16": "74765003214fc113" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "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": 61, "llr_stats": { "count": 174, "avg_abs": 1.074864, "min_abs": 0.002138, "max_abs": 3.871059, "positive": 117, "negative": 57, "zero": 0 }, "source_rank_score": 104.299456, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "83306fbbd73e8853", "codeword174_sha256_16": "28c0611403d18822" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 25, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 4.5, "tone_spacing_offset_hz": 0.0 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1029.5, "tone_spacing_hz": 1.875, "nsps": 6400 }, "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": 1029.5, "tone_spacing_hz": 1.875, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:25" }, "best_row": { "variant": "raw_msb_symbol_order", "transform": "raw_msb+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 141, "llr_stats": { "count": 174, "avg_abs": 2.061371, "min_abs": 0.00324, "max_abs": 4.274643, "positive": 32, "negative": 142, "zero": 0 }, "source_rank_score": 126.245484, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "7fd92be77aa95d3a", "codeword174_sha256_16": "0201ec5a9b5b2e3b" }, "top_rows": [ { "variant": "raw_msb_symbol_order", "transform": "raw_msb+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 141, "llr_stats": { "count": 174, "avg_abs": 2.061371, "min_abs": 0.00324, "max_abs": 4.274643, "positive": 32, "negative": 142, "zero": 0 }, "source_rank_score": 126.245484, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "7fd92be77aa95d3a", "codeword174_sha256_16": "0201ec5a9b5b2e3b" }, { "variant": "lsb_within_each_tone", "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": 141, "llr_stats": { "count": 174, "avg_abs": 2.061371, "min_abs": 0.00324, "max_abs": 4.274643, "positive": 32, "negative": 142, "zero": 0 }, "source_rank_score": 118.245484, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "7fd92be77aa95d3a", "codeword174_sha256_16": "0201ec5a9b5b2e3b" }, { "variant": "mapped_lsb_within_each_tone+no_interleaver", "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": 141, "llr_stats": { "count": 174, "avg_abs": 2.061371, "min_abs": 0.00324, "max_abs": 4.274643, "positive": 32, "negative": 142, "zero": 0 }, "source_rank_score": 108.245484, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "7fd92be77aa95d3a", "codeword174_sha256_16": "0201ec5a9b5b2e3b" }, { "variant": "mapped_raw_msb+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": 141, "llr_stats": { "count": 174, "avg_abs": 2.061371, "min_abs": 0.00324, "max_abs": 4.274643, "positive": 32, "negative": 142, "zero": 0 }, "source_rank_score": 108.245484, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "7fd92be77aa95d3a", "codeword174_sha256_16": "0201ec5a9b5b2e3b" }, { "variant": "mapped_raw_msb+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": 141, "llr_stats": { "count": 174, "avg_abs": 2.061371, "min_abs": 0.00324, "max_abs": 4.274643, "positive": 32, "negative": 142, "zero": 0 }, "source_rank_score": 108.245484, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "7fd92be77aa95d3a", "codeword174_sha256_16": "0201ec5a9b5b2e3b" }, { "variant": "mapped_raw_msb+no_interleaver", "transform": "raw_msb+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 141, "llr_stats": { "count": 174, "avg_abs": 2.061371, "min_abs": 0.00324, "max_abs": 4.274643, "positive": 32, "negative": 142, "zero": 0 }, "source_rank_score": 108.245484, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "7fd92be77aa95d3a", "codeword174_sha256_16": "0201ec5a9b5b2e3b" }, { "variant": "mapped_ft8_gray_primary_demap_msb_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": 128, "llr_stats": { "count": 174, "avg_abs": 1.219845, "min_abs": 0.001305, "max_abs": 3.783049, "positive": 42, "negative": 132, "zero": 0 }, "source_rank_score": 104.87938, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "522313e00a992a7b", "codeword174_sha256_16": "b7191964a661a02d" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_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": 128, "llr_stats": { "count": 174, "avg_abs": 1.17103, "min_abs": 0.002471, "max_abs": 3.783049, "positive": 38, "negative": 136, "zero": 0 }, "source_rank_score": 104.68412, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "522313e00a992a7b", "codeword174_sha256_16": "b7191964a661a02d" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 20, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 3.5, "tone_spacing_offset_hz": -0.03 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1028.5, "tone_spacing_hz": 1.845, "nsps": 6400 }, "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": 1.845, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:20" }, "best_row": { "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+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": 125, "llr_stats": { "count": 174, "avg_abs": 1.66919, "min_abs": 0.002626, "max_abs": 3.91817, "positive": 41, "negative": 133, "zero": 0 }, "source_rank_score": 106.67676, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "19b08813892a465d", "codeword174_sha256_16": "98ad9f5d93eab225" }, "top_rows": [ { "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+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": 125, "llr_stats": { "count": 174, "avg_abs": 1.66919, "min_abs": 0.002626, "max_abs": 3.91817, "positive": 41, "negative": 133, "zero": 0 }, "source_rank_score": 106.67676, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "19b08813892a465d", "codeword174_sha256_16": "98ad9f5d93eab225" }, { "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_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": 105, "llr_stats": { "count": 174, "avg_abs": 1.131115, "min_abs": 0.003669, "max_abs": 3.549497, "positive": 67, "negative": 107, "zero": 0 }, "source_rank_score": 104.52446, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "dd000bb12884ff34", "codeword174_sha256_16": "c59341021e0676e7" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+no_interleaver", "transform": "lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 59, "llr_stats": { "count": 174, "avg_abs": 1.701322, "min_abs": 0.004742, "max_abs": 3.873713, "positive": 120, "negative": 54, "zero": 0 }, "source_rank_score": 106.805288, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "9c01737f4aeb9695", "codeword174_sha256_16": "bc131bc857b8fd31" }, { "variant": "mapped_raw_msb+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": 116, "llr_stats": { "count": 174, "avg_abs": 1.691194, "min_abs": 0.004742, "max_abs": 3.801836, "positive": 48, "negative": 126, "zero": 0 }, "source_rank_score": 106.764776, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "aac0c46f3706d4b7", "codeword174_sha256_16": "98e503566e802118" }, { "variant": "mapped_raw_msb+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": 116, "llr_stats": { "count": 174, "avg_abs": 1.634484, "min_abs": 0.003516, "max_abs": 3.801836, "positive": 51, "negative": 123, "zero": 0 }, "source_rank_score": 106.537936, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "aac0c46f3706d4b7", "codeword174_sha256_16": "98e503566e802118" }, { "variant": "reverse_symbol_order", "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": 61, "llr_stats": { "count": 174, "avg_abs": 1.780164, "min_abs": 0.003515, "max_abs": 4.088622, "positive": 134, "negative": 40, "zero": 0 }, "source_rank_score": 111.120656, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "17e5d06559c52a35", "codeword174_sha256_16": "001b4860f509a5d7" }, { "variant": "reverse_full_bitstream", "transform": "ft8_gray_alt_high_demap_msb_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": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 61, "llr_stats": { "count": 174, "avg_abs": 1.63496, "min_abs": 0.003515, "max_abs": 3.873713, "positive": 114, "negative": 60, "zero": 0 }, "source_rank_score": 109.53984, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "17e5d06559c52a35", "codeword174_sha256_16": "001b4860f509a5d7" }, { "variant": "mapped_raw_msb+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+no_interleaver", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 39, "llr_stats": { "count": 174, "avg_abs": 2.202357, "min_abs": 0.004742, "max_abs": 4.088622, "positive": 139, "negative": 35, "zero": 0 }, "source_rank_score": 108.809428, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "2e790574e40151c8", "codeword174_sha256_16": "5df9f8ed4f8c7306" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 23, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 4.0, "tone_spacing_offset_hz": -0.03 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1029.0, "tone_spacing_hz": 1.845, "nsps": 6400 }, "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": 1029.0, "tone_spacing_hz": 1.845, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:23" }, "best_row": { "variant": "mapped_ft8_gray_primary_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": 107, "llr_stats": { "count": 174, "avg_abs": 1.110512, "min_abs": 0.000235, "max_abs": 3.70669, "positive": 62, "negative": 112, "zero": 0 }, "source_rank_score": 104.442048, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "e2a04bc8873cd51b", "codeword174_sha256_16": "5f92cab401d389b8" }, "top_rows": [ { "variant": "mapped_ft8_gray_primary_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": 107, "llr_stats": { "count": 174, "avg_abs": 1.110512, "min_abs": 0.000235, "max_abs": 3.70669, "positive": 62, "negative": 112, "zero": 0 }, "source_rank_score": 104.442048, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "e2a04bc8873cd51b", "codeword174_sha256_16": "5f92cab401d389b8" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "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": 116, "llr_stats": { "count": 174, "avg_abs": 1.209004, "min_abs": 4.8e-05, "max_abs": 3.868363, "positive": 49, "negative": 125, "zero": 0 }, "source_rank_score": 104.836016, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "2a60dab5f22bdeb9", "codeword174_sha256_16": "324857f8511d7ab8" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_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": 44, "llr_stats": { "count": 174, "avg_abs": 1.483932, "min_abs": 0.002548, "max_abs": 4.301509, "positive": 130, "negative": 44, "zero": 0 }, "source_rank_score": 105.935728, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "41f38ee3a2884ea3", "codeword174_sha256_16": "da6cffabf95007e0" }, { "variant": "mapped_ft8_gray_primary_demap_msb_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": 45, "llr_stats": { "count": 174, "avg_abs": 1.528267, "min_abs": 0.000574, "max_abs": 4.301509, "positive": 134, "negative": 40, "zero": 0 }, "source_rank_score": 106.113068, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "41f38ee3a2884ea3", "codeword174_sha256_16": "e6d7ca287cd841f5" }, { "variant": "mapped_ft8_gray_primary_demap_msb_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": 47, "llr_stats": { "count": 174, "avg_abs": 1.483001, "min_abs": 0.000463, "max_abs": 4.301509, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 105.932004, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "76e6ebcaab758d57", "codeword174_sha256_16": "43fd69baa6275efa" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "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": 133, "llr_stats": { "count": 174, "avg_abs": 1.051506, "min_abs": 0.000742, "max_abs": 3.029638, "positive": 42, "negative": 132, "zero": 0 }, "source_rank_score": 104.206024, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "80152402848c8fd2", "codeword174_sha256_16": "b1aa695db14b9528" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_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": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 54, "llr_stats": { "count": 174, "avg_abs": 1.570633, "min_abs": 0.013213, "max_abs": 3.868363, "positive": 123, "negative": 51, "zero": 0 }, "source_rank_score": 106.282532, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "e68de5e9e889b44d", "codeword174_sha256_16": "4472fdb1ccb84734" }, { "variant": "mapped_raw_msb+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": 56, "llr_stats": { "count": 174, "avg_abs": 1.549143, "min_abs": 0.04597, "max_abs": 3.742293, "positive": 120, "negative": 54, "zero": 0 }, "source_rank_score": 106.196572, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "2f35f2655a2e1d94", "codeword174_sha256_16": "258ccfc85b73ee00" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 3, "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": 1.905, "nsps": 6400 }, "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": 1.905, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:3" }, "best_row": { "variant": "mapped_ft8_gray_primary_demap_msb_input+no_interleaver", "transform": "lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 38, "llr_stats": { "count": 174, "avg_abs": 1.883273, "min_abs": 0.004668, "max_abs": 4.206963, "positive": 144, "negative": 30, "zero": 0 }, "source_rank_score": 107.533092, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "9dc92bc8076d3453", "codeword174_sha256_16": "69589423fe420ec9" }, "top_rows": [ { "variant": "mapped_ft8_gray_primary_demap_msb_input+no_interleaver", "transform": "lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 38, "llr_stats": { "count": 174, "avg_abs": 1.883273, "min_abs": 0.004668, "max_abs": 4.206963, "positive": 144, "negative": 30, "zero": 0 }, "source_rank_score": 107.533092, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "9dc92bc8076d3453", "codeword174_sha256_16": "69589423fe420ec9" }, { "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", "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": 63, "llr_stats": { "count": 174, "avg_abs": 1.495211, "min_abs": 0.006001, "max_abs": 4.206963, "positive": 115, "negative": 59, "zero": 0 }, "source_rank_score": 105.980844, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "980fa2c313a59ed7", "codeword174_sha256_16": "94f3aa758feed897" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "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": 113, "llr_stats": { "count": 174, "avg_abs": 1.171359, "min_abs": 0.000261, "max_abs": 3.142279, "positive": 62, "negative": 112, "zero": 0 }, "source_rank_score": 104.685436, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "d347312390ff5cf2", "codeword174_sha256_16": "6dd8473311877d6b" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_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": 55, "llr_stats": { "count": 174, "avg_abs": 1.140102, "min_abs": 1e-06, "max_abs": 2.987177, "positive": 121, "negative": 53, "zero": 0 }, "source_rank_score": 104.560408, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "a17885ef99d8871e", "codeword174_sha256_16": "9d7026f93f1641b5" }, { "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": 40, "llr_stats": { "count": 174, "avg_abs": 1.826466, "min_abs": 0.000261, "max_abs": 4.206963, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 125.305864, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "2713ced8ec42e2ee", "codeword174_sha256_16": "df1c85af54cc4761" }, { "variant": "lsb_within_each_tone", "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": 40, "llr_stats": { "count": 174, "avg_abs": 1.520682, "min_abs": 0.000261, "max_abs": 3.761123, "positive": 113, "negative": 61, "zero": 0 }, "source_rank_score": 116.082728, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "2713ced8ec42e2ee", "codeword174_sha256_16": "df1c85af54cc4761" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "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": 40, "llr_stats": { "count": 174, "avg_abs": 1.826466, "min_abs": 0.000261, "max_abs": 4.206963, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 107.305864, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "2713ced8ec42e2ee", "codeword174_sha256_16": "df1c85af54cc4761" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "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": 40, "llr_stats": { "count": 174, "avg_abs": 1.826466, "min_abs": 0.000261, "max_abs": 4.206963, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 107.305864, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "2713ced8ec42e2ee", "codeword174_sha256_16": "df1c85af54cc4761" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 16, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 3.0, "tone_spacing_offset_hz": 0.0 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.875, "nsps": 6400 }, "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": 1.875, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:16" }, "best_row": { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_lsb_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": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 52, "llr_stats": { "count": 174, "avg_abs": 1.386406, "min_abs": 0.005031, "max_abs": 4.071798, "positive": 133, "negative": 41, "zero": 0 }, "source_rank_score": 105.545624, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "20cb8982e61b4da6", "codeword174_sha256_16": "930f19c9f48a77d8" }, "top_rows": [ { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_lsb_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": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 52, "llr_stats": { "count": 174, "avg_abs": 1.386406, "min_abs": 0.005031, "max_abs": 4.071798, "positive": 133, "negative": 41, "zero": 0 }, "source_rank_score": 105.545624, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "20cb8982e61b4da6", "codeword174_sha256_16": "930f19c9f48a77d8" }, { "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 }, "bit_count": 174, "hard_weight_174": 52, "llr_stats": { "count": 174, "avg_abs": 1.315017, "min_abs": 0.004658, "max_abs": 4.071798, "positive": 131, "negative": 43, "zero": 0 }, "source_rank_score": 105.260068, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "20cb8982e61b4da6", "codeword174_sha256_16": "930f19c9f48a77d8" }, { "variant": "reverse_symbol_order", "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": 117, "llr_stats": { "count": 174, "avg_abs": 1.878257, "min_abs": 0.005474, "max_abs": 4.082287, "positive": 34, "negative": 140, "zero": 0 }, "source_rank_score": 111.513028, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "5a5f45650d34d120", "codeword174_sha256_16": "c3ddcaf03c3ccd70" }, { "variant": "reverse_symbol_order", "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": 33, "llr_stats": { "count": 174, "avg_abs": 1.74431, "min_abs": 0.007324, "max_abs": 3.889221, "positive": 127, "negative": 47, "zero": 0 }, "source_rank_score": 110.97724, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "e1e8116e828e9db5", "codeword174_sha256_16": "83548fad996036b7" }, { "variant": "reverse_full_bitstream", "transform": "ft8_gray_primary_demap_lsb_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": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 33, "llr_stats": { "count": 174, "avg_abs": 1.935993, "min_abs": 0.007324, "max_abs": 4.082287, "positive": 147, "negative": 27, "zero": 0 }, "source_rank_score": 110.743972, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "e1e8116e828e9db5", "codeword174_sha256_16": "83548fad996036b7" }, { "variant": "reverse_full_bitstream", "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": 117, "llr_stats": { "count": 174, "avg_abs": 1.686575, "min_abs": 0.005474, "max_abs": 3.889221, "positive": 54, "negative": 120, "zero": 0 }, "source_rank_score": 109.7463, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "5a5f45650d34d120", "codeword174_sha256_16": "c3ddcaf03c3ccd70" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_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": 99, "llr_stats": { "count": 174, "avg_abs": 1.116924, "min_abs": 0.004138, "max_abs": 3.889221, "positive": 72, "negative": 102, "zero": 0 }, "source_rank_score": 104.467696, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "145bc09c008ba5d6", "codeword174_sha256_16": "409c00e9c14169e8" }, { "variant": "mapped_raw_msb+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": 48, "llr_stats": { "count": 174, "avg_abs": 1.737959, "min_abs": 0.057881, "max_abs": 4.071798, "positive": 127, "negative": 47, "zero": 0 }, "source_rank_score": 106.951836, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "93cb5265335a79ef", "codeword174_sha256_16": "4766150d6d4fa78d" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 12, "offsets": { "start_offset_s": 0.0, "base_freq_offset_hz": 4.5, "tone_spacing_offset_hz": 0.03 }, "anchor_applied": { "start_seconds": 4.8, "base_freq_hz": 1029.5, "tone_spacing_hz": 1.905, "nsps": 6400 }, "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": 1029.5, "tone_spacing_hz": 1.905, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:12" }, "best_row": { "variant": "mapped_ft8_gray_primary_demap_msb_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": 138, "llr_stats": { "count": 174, "avg_abs": 1.353497, "min_abs": 0.000502, "max_abs": 3.874215, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 105.413988, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "2a682adb0723359d", "codeword174_sha256_16": "a247ca5c9f29b5ce" }, "top_rows": [ { "variant": "mapped_ft8_gray_primary_demap_msb_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": 138, "llr_stats": { "count": 174, "avg_abs": 1.353497, "min_abs": 0.000502, "max_abs": 3.874215, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 105.413988, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "2a682adb0723359d", "codeword174_sha256_16": "a247ca5c9f29b5ce" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_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": 138, "llr_stats": { "count": 174, "avg_abs": 1.329849, "min_abs": 0.000185, "max_abs": 3.874215, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 105.319396, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "2a682adb0723359d", "codeword174_sha256_16": "a247ca5c9f29b5ce" }, { "variant": "mapped_raw_msb+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": 1.620206, "min_abs": 0.007163, "max_abs": 3.874215, "positive": 136, "negative": 38, "zero": 0 }, "source_rank_score": 106.480824, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "744b05836ecbcbe7", "codeword174_sha256_16": "568610ba9457b09f" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_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": 135, "llr_stats": { "count": 174, "avg_abs": 1.223374, "min_abs": 0.000233, "max_abs": 3.781995, "positive": 33, "negative": 141, "zero": 0 }, "source_rank_score": 104.893496, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "346b39e657fd9af2", "codeword174_sha256_16": "46cb1d75970a3803" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_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": 135, "llr_stats": { "count": 174, "avg_abs": 1.221819, "min_abs": 8.2e-05, "max_abs": 3.781995, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 104.887276, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "346b39e657fd9af2", "codeword174_sha256_16": "46cb1d75970a3803" }, { "variant": "raw_msb_symbol_order", "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": 135, "llr_stats": { "count": 174, "avg_abs": 1.592845, "min_abs": 0.010963, "max_abs": 3.781995, "positive": 34, "negative": 140, "zero": 0 }, "source_rank_score": 124.37138, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "5dd3399566d3b627", "codeword174_sha256_16": "a46e41c47e03bed8" }, { "variant": "raw_msb_symbol_order", "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": 135, "llr_stats": { "count": 174, "avg_abs": 1.555609, "min_abs": 0.004557, "max_abs": 3.781995, "positive": 34, "negative": 140, "zero": 0 }, "source_rank_score": 124.222436, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "5dd3399566d3b627", "codeword174_sha256_16": "a46e41c47e03bed8" }, { "variant": "lsb_within_each_tone", "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": 135, "llr_stats": { "count": 174, "avg_abs": 1.855681, "min_abs": 0.010963, "max_abs": 4.002562, "positive": 28, "negative": 146, "zero": 0 }, "source_rank_score": 117.422724, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "5dd3399566d3b627", "codeword174_sha256_16": "a46e41c47e03bed8" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 11, "offsets": { "start_offset_s": 0.0, "base_freq_offset_hz": 4.5, "tone_spacing_offset_hz": -0.03 }, "anchor_applied": { "start_seconds": 4.8, "base_freq_hz": 1029.5, "tone_spacing_hz": 1.845, "nsps": 6400 }, "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": 1029.5, "tone_spacing_hz": 1.845, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:11" }, "best_row": { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "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": 134, "llr_stats": { "count": 174, "avg_abs": 1.272009, "min_abs": 0.000567, "max_abs": 4.079288, "positive": 42, "negative": 132, "zero": 0 }, "source_rank_score": 105.088036, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "dc0344c66ac2c99b", "codeword174_sha256_16": "6974c4c526e2c94d" }, "top_rows": [ { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "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": 134, "llr_stats": { "count": 174, "avg_abs": 1.272009, "min_abs": 0.000567, "max_abs": 4.079288, "positive": 42, "negative": 132, "zero": 0 }, "source_rank_score": 105.088036, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "dc0344c66ac2c99b", "codeword174_sha256_16": "6974c4c526e2c94d" }, { "variant": "raw_msb_symbol_order", "transform": "ft8_gray_primary_demap_lsb_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": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 41, "llr_stats": { "count": 174, "avg_abs": 1.587569, "min_abs": 0.00039, "max_abs": 3.918957, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 124.350276, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "ea1ac80658c5352d", "codeword174_sha256_16": "c5c2175ccde6e5b3" }, { "variant": "lsb_within_each_tone", "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": 41, "llr_stats": { "count": 174, "avg_abs": 1.847373, "min_abs": 0.00039, "max_abs": 4.079288, "positive": 144, "negative": 30, "zero": 0 }, "source_rank_score": 117.389492, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "ea1ac80658c5352d", "codeword174_sha256_16": "c5c2175ccde6e5b3" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "raw_msb+no_interleaver", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 41, "llr_stats": { "count": 174, "avg_abs": 1.587569, "min_abs": 0.00039, "max_abs": 3.918957, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 106.350276, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "ea1ac80658c5352d", "codeword174_sha256_16": "c5c2175ccde6e5b3" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+no_interleaver", "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": 41, "llr_stats": { "count": 174, "avg_abs": 1.587569, "min_abs": 0.00039, "max_abs": 3.918957, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 106.350276, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "ea1ac80658c5352d", "codeword174_sha256_16": "c5c2175ccde6e5b3" }, { "variant": "mapped_lsb_within_each_tone+no_interleaver", "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": 41, "llr_stats": { "count": 174, "avg_abs": 1.587569, "min_abs": 0.00039, "max_abs": 3.918957, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 106.350276, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "ea1ac80658c5352d", "codeword174_sha256_16": "c5c2175ccde6e5b3" }, { "variant": "mapped_raw_msb+no_interleaver", "transform": "ft8_gray_primary_demap_lsb_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": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 41, "llr_stats": { "count": 174, "avg_abs": 1.587569, "min_abs": 0.00039, "max_abs": 3.918957, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 106.350276, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "ea1ac80658c5352d", "codeword174_sha256_16": "c5c2175ccde6e5b3" }, { "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+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": 136, "llr_stats": { "count": 174, "avg_abs": 1.357028, "min_abs": 0.002021, "max_abs": 4.079288, "positive": 38, "negative": 136, "zero": 0 }, "source_rank_score": 105.428112, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "dc0344c66ac2c99b", "codeword174_sha256_16": "9f8723dc4b58b6cf" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 24, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 4.0, "tone_spacing_offset_hz": 0.03 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1029.0, "tone_spacing_hz": 1.905, "nsps": 6400 }, "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": 1029.0, "tone_spacing_hz": 1.905, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:24" }, "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+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": 124, "llr_stats": { "count": 174, "avg_abs": 1.12694, "min_abs": 0.003683, "max_abs": 3.638909, "positive": 49, "negative": 125, "zero": 0 }, "source_rank_score": 104.50776, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "df177b1b43ebcb88", "codeword174_sha256_16": "60205fdd011c7e05" }, "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+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": 124, "llr_stats": { "count": 174, "avg_abs": 1.12694, "min_abs": 0.003683, "max_abs": 3.638909, "positive": 49, "negative": 125, "zero": 0 }, "source_rank_score": 104.50776, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "df177b1b43ebcb88", "codeword174_sha256_16": "60205fdd011c7e05" }, { "variant": "mapped_raw_msb+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": 122, "llr_stats": { "count": 174, "avg_abs": 1.564733, "min_abs": 0.002655, "max_abs": 3.707365, "positive": 51, "negative": 123, "zero": 0 }, "source_rank_score": 106.258932, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "4f001edffee5017f", "codeword174_sha256_16": "a5e99a9fff619150" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+no_interleaver", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 51, "llr_stats": { "count": 174, "avg_abs": 1.419682, "min_abs": 0.024839, "max_abs": 3.54107, "positive": 123, "negative": 51, "zero": 0 }, "source_rank_score": 105.678728, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "7a4f98eb8214a8ce", "codeword174_sha256_16": "395bf0abe3aec3be" }, { "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": 89, "llr_stats": { "count": 174, "avg_abs": 2.03621, "min_abs": 0.05766, "max_abs": 4.191314, "positive": 40, "negative": 134, "zero": 0 }, "source_rank_score": 100.14484, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "c01f71a2edd9b97d", "codeword174_sha256_16": "6cbef933635a5885" }, { "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": 134, "llr_stats": { "count": 174, "avg_abs": 1.700993, "min_abs": 0.004606, "max_abs": 4.191314, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 106.803972, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "88b1b2753c5bdae5", "codeword174_sha256_16": "0e969acbf79d9c0c" }, { "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" }, "bit_count": 174, "hard_weight_174": 126, "llr_stats": { "count": 174, "avg_abs": 1.20202, "min_abs": 0.000831, "max_abs": 3.64312, "positive": 43, "negative": 131, "zero": 0 }, "source_rank_score": 104.80808, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "df177b1b43ebcb88", "codeword174_sha256_16": "136b5757a40ae6cc" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "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": 126, "llr_stats": { "count": 174, "avg_abs": 1.128603, "min_abs": 0.008687, "max_abs": 4.191314, "positive": 46, "negative": 128, "zero": 0 }, "source_rank_score": 104.514412, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "1deaddb66b489890", "codeword174_sha256_16": "d67680bf6760f7e3" }, { "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": 121, "llr_stats": { "count": 174, "avg_abs": 1.461699, "min_abs": 0.004606, "max_abs": 3.54107, "positive": 49, "negative": 125, "zero": 0 }, "source_rank_score": 123.846796, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "c9536416c7505249", "codeword174_sha256_16": "b716e17f5524d175" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 5.0, "tone_spacing_offset_hz": -0.03 }, "anchor_applied": { "start_seconds": 4.8, "base_freq_hz": 1030.0, "tone_spacing_hz": 1.845, "nsps": 6400 }, "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": 1030.0, "tone_spacing_hz": 1.845, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:14" }, "best_row": { "variant": "mapped_lsb_within_each_tone+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": 47, "llr_stats": { "count": 174, "avg_abs": 1.347502, "min_abs": 0.002411, "max_abs": 3.955787, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 105.390008, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "1c2e6d4c1a1e2ab1", "codeword174_sha256_16": "b348ee70b6a3483c" }, "top_rows": [ { "variant": "mapped_lsb_within_each_tone+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": 47, "llr_stats": { "count": 174, "avg_abs": 1.347502, "min_abs": 0.002411, "max_abs": 3.955787, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 105.390008, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "1c2e6d4c1a1e2ab1", "codeword174_sha256_16": "b348ee70b6a3483c" }, { "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_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": 0.915549, "min_abs": 0.000541, "max_abs": 3.70776, "positive": 135, "negative": 39, "zero": 0 }, "source_rank_score": 103.662196, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "4519b9b754d1204f", "codeword174_sha256_16": "d94e9095d6c6e93a" }, { "variant": "mapped_raw_msb+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": 140, "llr_stats": { "count": 174, "avg_abs": 1.96276, "min_abs": 0.028868, "max_abs": 4.041541, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 107.85104, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "f1cd8126e5c533e3", "codeword174_sha256_16": "16a4556bf802b492" }, { "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+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": 119, "llr_stats": { "count": 174, "avg_abs": 1.065423, "min_abs": 0.005117, "max_abs": 3.498813, "positive": 52, "negative": 122, "zero": 0 }, "source_rank_score": 104.261692, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "af85b2aafd15d647", "codeword174_sha256_16": "6b02d8170f5771ba" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_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": 51, "llr_stats": { "count": 174, "avg_abs": 0.938196, "min_abs": 8.5e-05, "max_abs": 3.107059, "positive": 127, "negative": 47, "zero": 0 }, "source_rank_score": 103.752784, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "1ef1df661b088fb2", "codeword174_sha256_16": "7dcdc2345950aa49" }, { "variant": "raw_msb_symbol_order", "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": 132, "llr_stats": { "count": 174, "avg_abs": 1.402685, "min_abs": 0.016119, "max_abs": 4.041541, "positive": 39, "negative": 135, "zero": 0 }, "source_rank_score": 123.61074, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "9efa82de730c504e", "codeword174_sha256_16": "9fc74ff7a5307a79" }, { "variant": "lsb_within_each_tone", "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": 132, "llr_stats": { "count": 174, "avg_abs": 1.602357, "min_abs": 0.016119, "max_abs": 3.889323, "positive": 38, "negative": 136, "zero": 0 }, "source_rank_score": 116.409428, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "9efa82de730c504e", "codeword174_sha256_16": "9fc74ff7a5307a79" }, { "variant": "mapped_lsb_within_each_tone+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": 140, "llr_stats": { "count": 174, "avg_abs": 1.96276, "min_abs": 0.028868, "max_abs": 4.041541, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 107.85104, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "128686bc8fd1c14d", "codeword174_sha256_16": "e1946ca31cb74111" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 28, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 5.0, "tone_spacing_offset_hz": 0.0 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1030.0, "tone_spacing_hz": 1.875, "nsps": 6400 }, "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": 1030.0, "tone_spacing_hz": 1.875, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:28" }, "best_row": { "variant": "lab_mask_xor_preview", "transform": "raw_msb+no_interleaver", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 95, "llr_stats": { "count": 174, "avg_abs": 1.983812, "min_abs": 0.041058, "max_abs": 4.24207, "positive": 136, "negative": 38, "zero": 0 }, "source_rank_score": 99.935248, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "f2ef1762c906ef31", "codeword174_sha256_16": "c6cb32457e4c0ce8" }, "top_rows": [ { "variant": "lab_mask_xor_preview", "transform": "raw_msb+no_interleaver", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 95, "llr_stats": { "count": 174, "avg_abs": 1.983812, "min_abs": 0.041058, "max_abs": 4.24207, "positive": 136, "negative": 38, "zero": 0 }, "source_rank_score": 99.935248, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "f2ef1762c906ef31", "codeword174_sha256_16": "c6cb32457e4c0ce8" }, { "variant": "mapped_ft8_gray_alt_high_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", "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": 62, "llr_stats": { "count": 174, "avg_abs": 0.803329, "min_abs": 0.000439, "max_abs": 4.003245, "positive": 117, "negative": 57, "zero": 0 }, "source_rank_score": 103.213316, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "1ddf65b53765c405", "codeword174_sha256_16": "d21ebfe4fe19a48e" }, { "variant": "lab_mask_xor_preview", "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": 80, "llr_stats": { "count": 174, "avg_abs": 1.391376, "min_abs": 0.011395, "max_abs": 4.003245, "positive": 47, "negative": 127, "zero": 0 }, "source_rank_score": 97.565504, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "18e650f62fd5e09a", "codeword174_sha256_16": "7ffc3739b59e3fa2" }, { "variant": "mapped_lsb_within_each_tone+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": 59, "llr_stats": { "count": 174, "avg_abs": 1.384894, "min_abs": 0.012691, "max_abs": 3.864479, "positive": 122, "negative": 52, "zero": 0 }, "source_rank_score": 105.539576, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "cc70148368f3b858", "codeword174_sha256_16": "1efb9deb93117651" }, { "variant": "mapped_ft8_gray_alt_high_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": 131, "llr_stats": { "count": 174, "avg_abs": 1.347851, "min_abs": 2e-05, "max_abs": 3.94795, "positive": 42, "negative": 132, "zero": 0 }, "source_rank_score": 105.391404, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "5e6c6e2b61b907a6", "codeword174_sha256_16": "c23c8e48b4495a2e" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_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": 105, "llr_stats": { "count": 174, "avg_abs": 0.918547, "min_abs": 0.004101, "max_abs": 4.003245, "positive": 61, "negative": 113, "zero": 0 }, "source_rank_score": 103.674188, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "3223363eef47db07", "codeword174_sha256_16": "d7d8c2ca45f49a02" }, { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_alt_high_demap_msb_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": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 91, "llr_stats": { "count": 174, "avg_abs": 1.564828, "min_abs": 0.002818, "max_abs": 3.94795, "positive": 136, "negative": 38, "zero": 0 }, "source_rank_score": 98.259312, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "d976abd0f4c5e758", "codeword174_sha256_16": "9c0ea41469c0b0ac" }, { "variant": "lab_mask_xor_preview", "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": 82, "llr_stats": { "count": 174, "avg_abs": 1.355256, "min_abs": 0.002818, "max_abs": 4.003245, "positive": 50, "negative": 124, "zero": 0 }, "source_rank_score": 97.421024, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "d3b942034a3e8ac6", "codeword174_sha256_16": "58bfad37282e8343" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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/step38_timing_boundary_sweep.json", "timing_best_candidate_json": "/decoders/js8_decoder/runtime/timing_boundary_sweep/step38_best_timing_fec_candidate.json" }, "decodes": [], "warnings": [ "Step 38 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": "20260527T041823Z_real_run_timing_boundary_sweep_output.json", "path": "/decoders/js8_decoder/logs/20260527T041823Z_real_run_timing_boundary_sweep_output.json", "url": "/logs/20260527T041823Z_real_run_timing_boundary_sweep_output.json", "stat": { "exists": true, "is_file": true, "is_dir": false, "size": 144680, "mtime_utc": "2026-05-27T04:27:12Z" }, "json_preview": { "ok": true, "mode": "JS8", "tool": "webftr-js8-timing-boundary-candidate-sweep", "tool_version": "step38-fine-timing-ridge-sweep", "input_wav": "/decoders/js8_decoder/runtime/quick_prefilter_windows/js8_quick_selected_window.wav", "profile_scan_json": "/decoders/js8_decoder/logs/20260527T041823Z_real_run_profile_scan_output.json", "anchor_json": "/decoders/js8_decoder/logs/20260527T041823Z_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": "step38_timing_boundary_syndrome_sweep_no_message_unpack", "anchor_selection": { "source": "profile_scan_json", "path": "/decoders/js8_decoder/logs/20260527T041823Z_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 }, "sweep_grid": { "start_offsets_s": [ 0.0, 0.06, 0.12, 0.18, 0.24, 0.3, 0.36 ], "base_freq_offsets_hz": [ 3.0, 3.5, 4.0, 4.5, 5.0 ], "tone_spacing_offsets_hz": [ 0.0, -0.03, 0.03 ], "max_combinations": 30, "actual_combinations": 30 }, "decode_found": false, "best_final_syndrome_weight": 22, "best_candidate": { "combination_index": 18, "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": 1.905, "nsps": 6400 }, "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": 1.905, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:18" }, "best_row": { "variant": "mapped_ft8_gray_alt_high_demap_msb_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": 140, "llr_stats": { "count": 174, "avg_abs": 1.827784, "min_abs": 0.008053, "max_abs": 4.126624, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 107.311136, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "67b59638aa8882d6", "codeword174_sha256_16": "0228efbd612c9092" }, "top_rows": [ { "variant": "mapped_ft8_gray_alt_high_demap_msb_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": 140, "llr_stats": { "count": 174, "avg_abs": 1.827784, "min_abs": 0.008053, "max_abs": 4.126624, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 107.311136, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "67b59638aa8882d6", "codeword174_sha256_16": "0228efbd612c9092" }, { "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+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": 127, "llr_stats": { "count": 174, "avg_abs": 1.67241, "min_abs": 0.015278, "max_abs": 4.092886, "positive": 43, "negative": 131, "zero": 0 }, "source_rank_score": 106.68964, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "6a76c3f6f4855f72", "codeword174_sha256_16": "e94fe0f75c74d230" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "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": 35, "llr_stats": { "count": 174, "avg_abs": 1.591212, "min_abs": 0.003661, "max_abs": 4.126624, "positive": 139, "negative": 35, "zero": 0 }, "source_rank_score": 106.364848, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "4f673c96b1f1de5c", "codeword174_sha256_16": "90bdd003a67ea079" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+no_interleaver", "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": 36, "llr_stats": { "count": 174, "avg_abs": 1.64278, "min_abs": 0.002394, "max_abs": 4.126624, "positive": 148, "negative": 26, "zero": 0 }, "source_rank_score": 106.57112, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "4f673c96b1f1de5c", "codeword174_sha256_16": "eb17c3d482c6c1fa" }, { "variant": "lab_mask_xor_preview", "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": 83, "llr_stats": { "count": 174, "avg_abs": 1.882468, "min_abs": 0.003299, "max_abs": 4.126624, "positive": 26, "negative": 148, "zero": 0 }, "source_rank_score": 99.529872, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "e3f175dd3a2c81b2", "codeword174_sha256_16": "d5da07ca10be5a38" }, { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "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": 138, "llr_stats": { "count": 174, "avg_abs": 2.265758, "min_abs": 0.020953, "max_abs": 4.126624, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 109.063032, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "d5fd881ddc0d6fa3", "codeword174_sha256_16": "524f6b31360d4b54" }, { "variant": "reverse_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": 121, "llr_stats": { "count": 174, "avg_abs": 1.882468, "min_abs": 0.003299, "max_abs": 4.126624, "positive": 26, "negative": 148, "zero": 0 }, "source_rank_score": 111.529872, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "b5db807c301847ac", "codeword174_sha256_16": "eaf8f2e0f46bfa41" }, { "variant": "reverse_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": 123, "llr_stats": { "count": 174, "avg_abs": 1.827784, "min_abs": 0.008053, "max_abs": 4.126624, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 111.311136, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "b5db807c301847ac", "codeword174_sha256_16": "3bc0238a33865be3" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 18, "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": 1.905, "nsps": 6400 }, "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": 1.905, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:18" }, "best_row": { "variant": "mapped_ft8_gray_alt_high_demap_msb_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": 140, "llr_stats": { "count": 174, "avg_abs": 1.827784, "min_abs": 0.008053, "max_abs": 4.126624, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 107.311136, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "67b59638aa8882d6", "codeword174_sha256_16": "0228efbd612c9092" }, "top_rows": [ { "variant": "mapped_ft8_gray_alt_high_demap_msb_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": 140, "llr_stats": { "count": 174, "avg_abs": 1.827784, "min_abs": 0.008053, "max_abs": 4.126624, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 107.311136, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "67b59638aa8882d6", "codeword174_sha256_16": "0228efbd612c9092" }, { "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+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": 127, "llr_stats": { "count": 174, "avg_abs": 1.67241, "min_abs": 0.015278, "max_abs": 4.092886, "positive": 43, "negative": 131, "zero": 0 }, "source_rank_score": 106.68964, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "6a76c3f6f4855f72", "codeword174_sha256_16": "e94fe0f75c74d230" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "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": 35, "llr_stats": { "count": 174, "avg_abs": 1.591212, "min_abs": 0.003661, "max_abs": 4.126624, "positive": 139, "negative": 35, "zero": 0 }, "source_rank_score": 106.364848, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "4f673c96b1f1de5c", "codeword174_sha256_16": "90bdd003a67ea079" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+no_interleaver", "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": 36, "llr_stats": { "count": 174, "avg_abs": 1.64278, "min_abs": 0.002394, "max_abs": 4.126624, "positive": 148, "negative": 26, "zero": 0 }, "source_rank_score": 106.57112, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "4f673c96b1f1de5c", "codeword174_sha256_16": "eb17c3d482c6c1fa" }, { "variant": "lab_mask_xor_preview", "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": 83, "llr_stats": { "count": 174, "avg_abs": 1.882468, "min_abs": 0.003299, "max_abs": 4.126624, "positive": 26, "negative": 148, "zero": 0 }, "source_rank_score": 99.529872, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "e3f175dd3a2c81b2", "codeword174_sha256_16": "d5da07ca10be5a38" }, { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "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": 138, "llr_stats": { "count": 174, "avg_abs": 2.265758, "min_abs": 0.020953, "max_abs": 4.126624, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 109.063032, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "d5fd881ddc0d6fa3", "codeword174_sha256_16": "524f6b31360d4b54" }, { "variant": "reverse_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": 121, "llr_stats": { "count": 174, "avg_abs": 1.882468, "min_abs": 0.003299, "max_abs": 4.126624, "positive": 26, "negative": 148, "zero": 0 }, "source_rank_score": 111.529872, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "b5db807c301847ac", "codeword174_sha256_16": "eaf8f2e0f46bfa41" }, { "variant": "reverse_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": 123, "llr_stats": { "count": 174, "avg_abs": 1.827784, "min_abs": 0.008053, "max_abs": 4.126624, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 111.311136, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "b5db807c301847ac", "codeword174_sha256_16": "3bc0238a33865be3" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 15, "offsets": { "start_offset_s": 0.0, "base_freq_offset_hz": 5.0, "tone_spacing_offset_hz": 0.03 }, "anchor_applied": { "start_seconds": 4.8, "base_freq_hz": 1030.0, "tone_spacing_hz": 1.905, "nsps": 6400 }, "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": 1030.0, "tone_spacing_hz": 1.905, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:15" }, "best_row": { "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": 84, "llr_stats": { "count": 174, "avg_abs": 1.566292, "min_abs": 0.008625, "max_abs": 3.871059, "positive": 46, "negative": 128, "zero": 0 }, "source_rank_score": 98.265168, "syndrome_weight": 24, "valid_codeword_hard_decision": false, "message91_sha256_16": "15da00dc0c187968", "codeword174_sha256_16": "a34efb83ad21097f" }, "top_rows": [ { "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": 84, "llr_stats": { "count": 174, "avg_abs": 1.566292, "min_abs": 0.008625, "max_abs": 3.871059, "positive": 46, "negative": 128, "zero": 0 }, "source_rank_score": 98.265168, "syndrome_weight": 24, "valid_codeword_hard_decision": false, "message91_sha256_16": "15da00dc0c187968", "codeword174_sha256_16": "a34efb83ad21097f" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "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": 46, "llr_stats": { "count": 174, "avg_abs": 1.251631, "min_abs": 0.005541, "max_abs": 4.032212, "positive": 128, "negative": 46, "zero": 0 }, "source_rank_score": 105.006524, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "ff55f5e7dbb755af", "codeword174_sha256_16": "46f8b82ab21340e3" }, { "variant": "mapped_raw_msb+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": 125, "llr_stats": { "count": 174, "avg_abs": 1.553047, "min_abs": 0.04156, "max_abs": 3.744241, "positive": 49, "negative": 125, "zero": 0 }, "source_rank_score": 106.212188, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "0a664839a51e9f34", "codeword174_sha256_16": "299293d8b8d7026b" }, { "variant": "mapped_ft8_gray_primary_demap_msb_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": 123, "llr_stats": { "count": 174, "avg_abs": 1.285799, "min_abs": 0.003321, "max_abs": 3.744241, "positive": 50, "negative": 124, "zero": 0 }, "source_rank_score": 105.143196, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "afefdb2bc335171d", "codeword174_sha256_16": "67c8c6e096cb6235" }, { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "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": 52, "llr_stats": { "count": 174, "avg_abs": 1.562515, "min_abs": 0.033601, "max_abs": 4.042898, "positive": 122, "negative": 52, "zero": 0 }, "source_rank_score": 106.25006, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "555090f944023a0c", "codeword174_sha256_16": "3d0eb40db86bb238" }, { "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_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": 64, "llr_stats": { "count": 174, "avg_abs": 1.045094, "min_abs": 0.005438, "max_abs": 3.871059, "positive": 110, "negative": 64, "zero": 0 }, "source_rank_score": 104.180376, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "83306fbbd73e8853", "codeword174_sha256_16": "366e3c1a45351d5b" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "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": 137, "llr_stats": { "count": 174, "avg_abs": 1.540017, "min_abs": 0.006373, "max_abs": 4.032212, "positive": 43, "negative": 131, "zero": 0 }, "source_rank_score": 106.160068, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "48e4ec60a6d27f12", "codeword174_sha256_16": "74765003214fc113" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "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": 61, "llr_stats": { "count": 174, "avg_abs": 1.074864, "min_abs": 0.002138, "max_abs": 3.871059, "positive": 117, "negative": 57, "zero": 0 }, "source_rank_score": 104.299456, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "83306fbbd73e8853", "codeword174_sha256_16": "28c0611403d18822" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 25, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 4.5, "tone_spacing_offset_hz": 0.0 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1029.5, "tone_spacing_hz": 1.875, "nsps": 6400 }, "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": 1029.5, "tone_spacing_hz": 1.875, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:25" }, "best_row": { "variant": "raw_msb_symbol_order", "transform": "raw_msb+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 141, "llr_stats": { "count": 174, "avg_abs": 2.061371, "min_abs": 0.00324, "max_abs": 4.274643, "positive": 32, "negative": 142, "zero": 0 }, "source_rank_score": 126.245484, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "7fd92be77aa95d3a", "codeword174_sha256_16": "0201ec5a9b5b2e3b" }, "top_rows": [ { "variant": "raw_msb_symbol_order", "transform": "raw_msb+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 141, "llr_stats": { "count": 174, "avg_abs": 2.061371, "min_abs": 0.00324, "max_abs": 4.274643, "positive": 32, "negative": 142, "zero": 0 }, "source_rank_score": 126.245484, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "7fd92be77aa95d3a", "codeword174_sha256_16": "0201ec5a9b5b2e3b" }, { "variant": "lsb_within_each_tone", "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": 141, "llr_stats": { "count": 174, "avg_abs": 2.061371, "min_abs": 0.00324, "max_abs": 4.274643, "positive": 32, "negative": 142, "zero": 0 }, "source_rank_score": 118.245484, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "7fd92be77aa95d3a", "codeword174_sha256_16": "0201ec5a9b5b2e3b" }, { "variant": "mapped_lsb_within_each_tone+no_interleaver", "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": 141, "llr_stats": { "count": 174, "avg_abs": 2.061371, "min_abs": 0.00324, "max_abs": 4.274643, "positive": 32, "negative": 142, "zero": 0 }, "source_rank_score": 108.245484, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "7fd92be77aa95d3a", "codeword174_sha256_16": "0201ec5a9b5b2e3b" }, { "variant": "mapped_raw_msb+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": 141, "llr_stats": { "count": 174, "avg_abs": 2.061371, "min_abs": 0.00324, "max_abs": 4.274643, "positive": 32, "negative": 142, "zero": 0 }, "source_rank_score": 108.245484, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "7fd92be77aa95d3a", "codeword174_sha256_16": "0201ec5a9b5b2e3b" }, { "variant": "mapped_raw_msb+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": 141, "llr_stats": { "count": 174, "avg_abs": 2.061371, "min_abs": 0.00324, "max_abs": 4.274643, "positive": 32, "negative": 142, "zero": 0 }, "source_rank_score": 108.245484, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "7fd92be77aa95d3a", "codeword174_sha256_16": "0201ec5a9b5b2e3b" }, { "variant": "mapped_raw_msb+no_interleaver", "transform": "raw_msb+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 141, "llr_stats": { "count": 174, "avg_abs": 2.061371, "min_abs": 0.00324, "max_abs": 4.274643, "positive": 32, "negative": 142, "zero": 0 }, "source_rank_score": 108.245484, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "7fd92be77aa95d3a", "codeword174_sha256_16": "0201ec5a9b5b2e3b" }, { "variant": "mapped_ft8_gray_primary_demap_msb_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": 128, "llr_stats": { "count": 174, "avg_abs": 1.219845, "min_abs": 0.001305, "max_abs": 3.783049, "positive": 42, "negative": 132, "zero": 0 }, "source_rank_score": 104.87938, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "522313e00a992a7b", "codeword174_sha256_16": "b7191964a661a02d" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_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": 128, "llr_stats": { "count": 174, "avg_abs": 1.17103, "min_abs": 0.002471, "max_abs": 3.783049, "positive": 38, "negative": 136, "zero": 0 }, "source_rank_score": 104.68412, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "522313e00a992a7b", "codeword174_sha256_16": "b7191964a661a02d" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 20, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 3.5, "tone_spacing_offset_hz": -0.03 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1028.5, "tone_spacing_hz": 1.845, "nsps": 6400 }, "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": 1.845, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:20" }, "best_row": { "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+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": 125, "llr_stats": { "count": 174, "avg_abs": 1.66919, "min_abs": 0.002626, "max_abs": 3.91817, "positive": 41, "negative": 133, "zero": 0 }, "source_rank_score": 106.67676, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "19b08813892a465d", "codeword174_sha256_16": "98ad9f5d93eab225" }, "top_rows": [ { "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+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": 125, "llr_stats": { "count": 174, "avg_abs": 1.66919, "min_abs": 0.002626, "max_abs": 3.91817, "positive": 41, "negative": 133, "zero": 0 }, "source_rank_score": 106.67676, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "19b08813892a465d", "codeword174_sha256_16": "98ad9f5d93eab225" }, { "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_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": 105, "llr_stats": { "count": 174, "avg_abs": 1.131115, "min_abs": 0.003669, "max_abs": 3.549497, "positive": 67, "negative": 107, "zero": 0 }, "source_rank_score": 104.52446, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "dd000bb12884ff34", "codeword174_sha256_16": "c59341021e0676e7" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+no_interleaver", "transform": "lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 59, "llr_stats": { "count": 174, "avg_abs": 1.701322, "min_abs": 0.004742, "max_abs": 3.873713, "positive": 120, "negative": 54, "zero": 0 }, "source_rank_score": 106.805288, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "9c01737f4aeb9695", "codeword174_sha256_16": "bc131bc857b8fd31" }, { "variant": "mapped_raw_msb+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": 116, "llr_stats": { "count": 174, "avg_abs": 1.691194, "min_abs": 0.004742, "max_abs": 3.801836, "positive": 48, "negative": 126, "zero": 0 }, "source_rank_score": 106.764776, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "aac0c46f3706d4b7", "codeword174_sha256_16": "98e503566e802118" }, { "variant": "mapped_raw_msb+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": 116, "llr_stats": { "count": 174, "avg_abs": 1.634484, "min_abs": 0.003516, "max_abs": 3.801836, "positive": 51, "negative": 123, "zero": 0 }, "source_rank_score": 106.537936, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "aac0c46f3706d4b7", "codeword174_sha256_16": "98e503566e802118" }, { "variant": "reverse_symbol_order", "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": 61, "llr_stats": { "count": 174, "avg_abs": 1.780164, "min_abs": 0.003515, "max_abs": 4.088622, "positive": 134, "negative": 40, "zero": 0 }, "source_rank_score": 111.120656, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "17e5d06559c52a35", "codeword174_sha256_16": "001b4860f509a5d7" }, { "variant": "reverse_full_bitstream", "transform": "ft8_gray_alt_high_demap_msb_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": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 61, "llr_stats": { "count": 174, "avg_abs": 1.63496, "min_abs": 0.003515, "max_abs": 3.873713, "positive": 114, "negative": 60, "zero": 0 }, "source_rank_score": 109.53984, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "17e5d06559c52a35", "codeword174_sha256_16": "001b4860f509a5d7" }, { "variant": "mapped_raw_msb+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+no_interleaver", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 39, "llr_stats": { "count": 174, "avg_abs": 2.202357, "min_abs": 0.004742, "max_abs": 4.088622, "positive": 139, "negative": 35, "zero": 0 }, "source_rank_score": 108.809428, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "2e790574e40151c8", "codeword174_sha256_16": "5df9f8ed4f8c7306" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 23, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 4.0, "tone_spacing_offset_hz": -0.03 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1029.0, "tone_spacing_hz": 1.845, "nsps": 6400 }, "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": 1029.0, "tone_spacing_hz": 1.845, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:23" }, "best_row": { "variant": "mapped_ft8_gray_primary_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": 107, "llr_stats": { "count": 174, "avg_abs": 1.110512, "min_abs": 0.000235, "max_abs": 3.70669, "positive": 62, "negative": 112, "zero": 0 }, "source_rank_score": 104.442048, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "e2a04bc8873cd51b", "codeword174_sha256_16": "5f92cab401d389b8" }, "top_rows": [ { "variant": "mapped_ft8_gray_primary_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": 107, "llr_stats": { "count": 174, "avg_abs": 1.110512, "min_abs": 0.000235, "max_abs": 3.70669, "positive": 62, "negative": 112, "zero": 0 }, "source_rank_score": 104.442048, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "e2a04bc8873cd51b", "codeword174_sha256_16": "5f92cab401d389b8" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "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": 116, "llr_stats": { "count": 174, "avg_abs": 1.209004, "min_abs": 4.8e-05, "max_abs": 3.868363, "positive": 49, "negative": 125, "zero": 0 }, "source_rank_score": 104.836016, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "2a60dab5f22bdeb9", "codeword174_sha256_16": "324857f8511d7ab8" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_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": 44, "llr_stats": { "count": 174, "avg_abs": 1.483932, "min_abs": 0.002548, "max_abs": 4.301509, "positive": 130, "negative": 44, "zero": 0 }, "source_rank_score": 105.935728, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "41f38ee3a2884ea3", "codeword174_sha256_16": "da6cffabf95007e0" }, { "variant": "mapped_ft8_gray_primary_demap_msb_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": 45, "llr_stats": { "count": 174, "avg_abs": 1.528267, "min_abs": 0.000574, "max_abs": 4.301509, "positive": 134, "negative": 40, "zero": 0 }, "source_rank_score": 106.113068, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "41f38ee3a2884ea3", "codeword174_sha256_16": "e6d7ca287cd841f5" }, { "variant": "mapped_ft8_gray_primary_demap_msb_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": 47, "llr_stats": { "count": 174, "avg_abs": 1.483001, "min_abs": 0.000463, "max_abs": 4.301509, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 105.932004, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "76e6ebcaab758d57", "codeword174_sha256_16": "43fd69baa6275efa" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "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": 133, "llr_stats": { "count": 174, "avg_abs": 1.051506, "min_abs": 0.000742, "max_abs": 3.029638, "positive": 42, "negative": 132, "zero": 0 }, "source_rank_score": 104.206024, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "80152402848c8fd2", "codeword174_sha256_16": "b1aa695db14b9528" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_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": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 54, "llr_stats": { "count": 174, "avg_abs": 1.570633, "min_abs": 0.013213, "max_abs": 3.868363, "positive": 123, "negative": 51, "zero": 0 }, "source_rank_score": 106.282532, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "e68de5e9e889b44d", "codeword174_sha256_16": "4472fdb1ccb84734" }, { "variant": "mapped_raw_msb+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": 56, "llr_stats": { "count": 174, "avg_abs": 1.549143, "min_abs": 0.04597, "max_abs": 3.742293, "positive": 120, "negative": 54, "zero": 0 }, "source_rank_score": 106.196572, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "2f35f2655a2e1d94", "codeword174_sha256_16": "258ccfc85b73ee00" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 3, "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": 1.905, "nsps": 6400 }, "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": 1.905, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:3" }, "best_row": { "variant": "mapped_ft8_gray_primary_demap_msb_input+no_interleaver", "transform": "lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 38, "llr_stats": { "count": 174, "avg_abs": 1.883273, "min_abs": 0.004668, "max_abs": 4.206963, "positive": 144, "negative": 30, "zero": 0 }, "source_rank_score": 107.533092, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "9dc92bc8076d3453", "codeword174_sha256_16": "69589423fe420ec9" }, "top_rows": [ { "variant": "mapped_ft8_gray_primary_demap_msb_input+no_interleaver", "transform": "lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 38, "llr_stats": { "count": 174, "avg_abs": 1.883273, "min_abs": 0.004668, "max_abs": 4.206963, "positive": 144, "negative": 30, "zero": 0 }, "source_rank_score": 107.533092, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "9dc92bc8076d3453", "codeword174_sha256_16": "69589423fe420ec9" }, { "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", "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": 63, "llr_stats": { "count": 174, "avg_abs": 1.495211, "min_abs": 0.006001, "max_abs": 4.206963, "positive": 115, "negative": 59, "zero": 0 }, "source_rank_score": 105.980844, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "980fa2c313a59ed7", "codeword174_sha256_16": "94f3aa758feed897" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "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": 113, "llr_stats": { "count": 174, "avg_abs": 1.171359, "min_abs": 0.000261, "max_abs": 3.142279, "positive": 62, "negative": 112, "zero": 0 }, "source_rank_score": 104.685436, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "d347312390ff5cf2", "codeword174_sha256_16": "6dd8473311877d6b" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_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": 55, "llr_stats": { "count": 174, "avg_abs": 1.140102, "min_abs": 1e-06, "max_abs": 2.987177, "positive": 121, "negative": 53, "zero": 0 }, "source_rank_score": 104.560408, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "a17885ef99d8871e", "codeword174_sha256_16": "9d7026f93f1641b5" }, { "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": 40, "llr_stats": { "count": 174, "avg_abs": 1.826466, "min_abs": 0.000261, "max_abs": 4.206963, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 125.305864, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "2713ced8ec42e2ee", "codeword174_sha256_16": "df1c85af54cc4761" }, { "variant": "lsb_within_each_tone", "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": 40, "llr_stats": { "count": 174, "avg_abs": 1.520682, "min_abs": 0.000261, "max_abs": 3.761123, "positive": 113, "negative": 61, "zero": 0 }, "source_rank_score": 116.082728, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "2713ced8ec42e2ee", "codeword174_sha256_16": "df1c85af54cc4761" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "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": 40, "llr_stats": { "count": 174, "avg_abs": 1.826466, "min_abs": 0.000261, "max_abs": 4.206963, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 107.305864, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "2713ced8ec42e2ee", "codeword174_sha256_16": "df1c85af54cc4761" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "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": 40, "llr_stats": { "count": 174, "avg_abs": 1.826466, "min_abs": 0.000261, "max_abs": 4.206963, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 107.305864, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "2713ced8ec42e2ee", "codeword174_sha256_16": "df1c85af54cc4761" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 16, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 3.0, "tone_spacing_offset_hz": 0.0 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.875, "nsps": 6400 }, "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": 1.875, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:16" }, "best_row": { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_lsb_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": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 52, "llr_stats": { "count": 174, "avg_abs": 1.386406, "min_abs": 0.005031, "max_abs": 4.071798, "positive": 133, "negative": 41, "zero": 0 }, "source_rank_score": 105.545624, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "20cb8982e61b4da6", "codeword174_sha256_16": "930f19c9f48a77d8" }, "top_rows": [ { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_lsb_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": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 52, "llr_stats": { "count": 174, "avg_abs": 1.386406, "min_abs": 0.005031, "max_abs": 4.071798, "positive": 133, "negative": 41, "zero": 0 }, "source_rank_score": 105.545624, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "20cb8982e61b4da6", "codeword174_sha256_16": "930f19c9f48a77d8" }, { "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 }, "bit_count": 174, "hard_weight_174": 52, "llr_stats": { "count": 174, "avg_abs": 1.315017, "min_abs": 0.004658, "max_abs": 4.071798, "positive": 131, "negative": 43, "zero": 0 }, "source_rank_score": 105.260068, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "20cb8982e61b4da6", "codeword174_sha256_16": "930f19c9f48a77d8" }, { "variant": "reverse_symbol_order", "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": 117, "llr_stats": { "count": 174, "avg_abs": 1.878257, "min_abs": 0.005474, "max_abs": 4.082287, "positive": 34, "negative": 140, "zero": 0 }, "source_rank_score": 111.513028, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "5a5f45650d34d120", "codeword174_sha256_16": "c3ddcaf03c3ccd70" }, { "variant": "reverse_symbol_order", "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": 33, "llr_stats": { "count": 174, "avg_abs": 1.74431, "min_abs": 0.007324, "max_abs": 3.889221, "positive": 127, "negative": 47, "zero": 0 }, "source_rank_score": 110.97724, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "e1e8116e828e9db5", "codeword174_sha256_16": "83548fad996036b7" }, { "variant": "reverse_full_bitstream", "transform": "ft8_gray_primary_demap_lsb_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": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 33, "llr_stats": { "count": 174, "avg_abs": 1.935993, "min_abs": 0.007324, "max_abs": 4.082287, "positive": 147, "negative": 27, "zero": 0 }, "source_rank_score": 110.743972, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "e1e8116e828e9db5", "codeword174_sha256_16": "83548fad996036b7" }, { "variant": "reverse_full_bitstream", "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": 117, "llr_stats": { "count": 174, "avg_abs": 1.686575, "min_abs": 0.005474, "max_abs": 3.889221, "positive": 54, "negative": 120, "zero": 0 }, "source_rank_score": 109.7463, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "5a5f45650d34d120", "codeword174_sha256_16": "c3ddcaf03c3ccd70" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_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": 99, "llr_stats": { "count": 174, "avg_abs": 1.116924, "min_abs": 0.004138, "max_abs": 3.889221, "positive": 72, "negative": 102, "zero": 0 }, "source_rank_score": 104.467696, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "145bc09c008ba5d6", "codeword174_sha256_16": "409c00e9c14169e8" }, { "variant": "mapped_raw_msb+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": 48, "llr_stats": { "count": 174, "avg_abs": 1.737959, "min_abs": 0.057881, "max_abs": 4.071798, "positive": 127, "negative": 47, "zero": 0 }, "source_rank_score": 106.951836, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "93cb5265335a79ef", "codeword174_sha256_16": "4766150d6d4fa78d" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 12, "offsets": { "start_offset_s": 0.0, "base_freq_offset_hz": 4.5, "tone_spacing_offset_hz": 0.03 }, "anchor_applied": { "start_seconds": 4.8, "base_freq_hz": 1029.5, "tone_spacing_hz": 1.905, "nsps": 6400 }, "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": 1029.5, "tone_spacing_hz": 1.905, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:12" }, "best_row": { "variant": "mapped_ft8_gray_primary_demap_msb_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": 138, "llr_stats": { "count": 174, "avg_abs": 1.353497, "min_abs": 0.000502, "max_abs": 3.874215, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 105.413988, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "2a682adb0723359d", "codeword174_sha256_16": "a247ca5c9f29b5ce" }, "top_rows": [ { "variant": "mapped_ft8_gray_primary_demap_msb_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": 138, "llr_stats": { "count": 174, "avg_abs": 1.353497, "min_abs": 0.000502, "max_abs": 3.874215, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 105.413988, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "2a682adb0723359d", "codeword174_sha256_16": "a247ca5c9f29b5ce" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_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": 138, "llr_stats": { "count": 174, "avg_abs": 1.329849, "min_abs": 0.000185, "max_abs": 3.874215, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 105.319396, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "2a682adb0723359d", "codeword174_sha256_16": "a247ca5c9f29b5ce" }, { "variant": "mapped_raw_msb+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": 1.620206, "min_abs": 0.007163, "max_abs": 3.874215, "positive": 136, "negative": 38, "zero": 0 }, "source_rank_score": 106.480824, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "744b05836ecbcbe7", "codeword174_sha256_16": "568610ba9457b09f" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_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": 135, "llr_stats": { "count": 174, "avg_abs": 1.223374, "min_abs": 0.000233, "max_abs": 3.781995, "positive": 33, "negative": 141, "zero": 0 }, "source_rank_score": 104.893496, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "346b39e657fd9af2", "codeword174_sha256_16": "46cb1d75970a3803" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_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": 135, "llr_stats": { "count": 174, "avg_abs": 1.221819, "min_abs": 8.2e-05, "max_abs": 3.781995, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 104.887276, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "346b39e657fd9af2", "codeword174_sha256_16": "46cb1d75970a3803" }, { "variant": "raw_msb_symbol_order", "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": 135, "llr_stats": { "count": 174, "avg_abs": 1.592845, "min_abs": 0.010963, "max_abs": 3.781995, "positive": 34, "negative": 140, "zero": 0 }, "source_rank_score": 124.37138, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "5dd3399566d3b627", "codeword174_sha256_16": "a46e41c47e03bed8" }, { "variant": "raw_msb_symbol_order", "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": 135, "llr_stats": { "count": 174, "avg_abs": 1.555609, "min_abs": 0.004557, "max_abs": 3.781995, "positive": 34, "negative": 140, "zero": 0 }, "source_rank_score": 124.222436, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "5dd3399566d3b627", "codeword174_sha256_16": "a46e41c47e03bed8" }, { "variant": "lsb_within_each_tone", "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": 135, "llr_stats": { "count": 174, "avg_abs": 1.855681, "min_abs": 0.010963, "max_abs": 4.002562, "positive": 28, "negative": 146, "zero": 0 }, "source_rank_score": 117.422724, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "5dd3399566d3b627", "codeword174_sha256_16": "a46e41c47e03bed8" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 11, "offsets": { "start_offset_s": 0.0, "base_freq_offset_hz": 4.5, "tone_spacing_offset_hz": -0.03 }, "anchor_applied": { "start_seconds": 4.8, "base_freq_hz": 1029.5, "tone_spacing_hz": 1.845, "nsps": 6400 }, "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": 1029.5, "tone_spacing_hz": 1.845, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:11" }, "best_row": { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "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": 134, "llr_stats": { "count": 174, "avg_abs": 1.272009, "min_abs": 0.000567, "max_abs": 4.079288, "positive": 42, "negative": 132, "zero": 0 }, "source_rank_score": 105.088036, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "dc0344c66ac2c99b", "codeword174_sha256_16": "6974c4c526e2c94d" }, "top_rows": [ { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "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": 134, "llr_stats": { "count": 174, "avg_abs": 1.272009, "min_abs": 0.000567, "max_abs": 4.079288, "positive": 42, "negative": 132, "zero": 0 }, "source_rank_score": 105.088036, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "dc0344c66ac2c99b", "codeword174_sha256_16": "6974c4c526e2c94d" }, { "variant": "raw_msb_symbol_order", "transform": "ft8_gray_primary_demap_lsb_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": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 41, "llr_stats": { "count": 174, "avg_abs": 1.587569, "min_abs": 0.00039, "max_abs": 3.918957, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 124.350276, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "ea1ac80658c5352d", "codeword174_sha256_16": "c5c2175ccde6e5b3" }, { "variant": "lsb_within_each_tone", "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": 41, "llr_stats": { "count": 174, "avg_abs": 1.847373, "min_abs": 0.00039, "max_abs": 4.079288, "positive": 144, "negative": 30, "zero": 0 }, "source_rank_score": 117.389492, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "ea1ac80658c5352d", "codeword174_sha256_16": "c5c2175ccde6e5b3" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "raw_msb+no_interleaver", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 41, "llr_stats": { "count": 174, "avg_abs": 1.587569, "min_abs": 0.00039, "max_abs": 3.918957, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 106.350276, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "ea1ac80658c5352d", "codeword174_sha256_16": "c5c2175ccde6e5b3" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+no_interleaver", "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": 41, "llr_stats": { "count": 174, "avg_abs": 1.587569, "min_abs": 0.00039, "max_abs": 3.918957, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 106.350276, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "ea1ac80658c5352d", "codeword174_sha256_16": "c5c2175ccde6e5b3" }, { "variant": "mapped_lsb_within_each_tone+no_interleaver", "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": 41, "llr_stats": { "count": 174, "avg_abs": 1.587569, "min_abs": 0.00039, "max_abs": 3.918957, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 106.350276, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "ea1ac80658c5352d", "codeword174_sha256_16": "c5c2175ccde6e5b3" }, { "variant": "mapped_raw_msb+no_interleaver", "transform": "ft8_gray_primary_demap_lsb_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": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 41, "llr_stats": { "count": 174, "avg_abs": 1.587569, "min_abs": 0.00039, "max_abs": 3.918957, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 106.350276, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "ea1ac80658c5352d", "codeword174_sha256_16": "c5c2175ccde6e5b3" }, { "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+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": 136, "llr_stats": { "count": 174, "avg_abs": 1.357028, "min_abs": 0.002021, "max_abs": 4.079288, "positive": 38, "negative": 136, "zero": 0 }, "source_rank_score": 105.428112, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "dc0344c66ac2c99b", "codeword174_sha256_16": "9f8723dc4b58b6cf" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 24, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 4.0, "tone_spacing_offset_hz": 0.03 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1029.0, "tone_spacing_hz": 1.905, "nsps": 6400 }, "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": 1029.0, "tone_spacing_hz": 1.905, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:24" }, "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+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": 124, "llr_stats": { "count": 174, "avg_abs": 1.12694, "min_abs": 0.003683, "max_abs": 3.638909, "positive": 49, "negative": 125, "zero": 0 }, "source_rank_score": 104.50776, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "df177b1b43ebcb88", "codeword174_sha256_16": "60205fdd011c7e05" }, "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+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": 124, "llr_stats": { "count": 174, "avg_abs": 1.12694, "min_abs": 0.003683, "max_abs": 3.638909, "positive": 49, "negative": 125, "zero": 0 }, "source_rank_score": 104.50776, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "df177b1b43ebcb88", "codeword174_sha256_16": "60205fdd011c7e05" }, { "variant": "mapped_raw_msb+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": 122, "llr_stats": { "count": 174, "avg_abs": 1.564733, "min_abs": 0.002655, "max_abs": 3.707365, "positive": 51, "negative": 123, "zero": 0 }, "source_rank_score": 106.258932, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "4f001edffee5017f", "codeword174_sha256_16": "a5e99a9fff619150" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+no_interleaver", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 51, "llr_stats": { "count": 174, "avg_abs": 1.419682, "min_abs": 0.024839, "max_abs": 3.54107, "positive": 123, "negative": 51, "zero": 0 }, "source_rank_score": 105.678728, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "7a4f98eb8214a8ce", "codeword174_sha256_16": "395bf0abe3aec3be" }, { "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": 89, "llr_stats": { "count": 174, "avg_abs": 2.03621, "min_abs": 0.05766, "max_abs": 4.191314, "positive": 40, "negative": 134, "zero": 0 }, "source_rank_score": 100.14484, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "c01f71a2edd9b97d", "codeword174_sha256_16": "6cbef933635a5885" }, { "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": 134, "llr_stats": { "count": 174, "avg_abs": 1.700993, "min_abs": 0.004606, "max_abs": 4.191314, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 106.803972, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "88b1b2753c5bdae5", "codeword174_sha256_16": "0e969acbf79d9c0c" }, { "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" }, "bit_count": 174, "hard_weight_174": 126, "llr_stats": { "count": 174, "avg_abs": 1.20202, "min_abs": 0.000831, "max_abs": 3.64312, "positive": 43, "negative": 131, "zero": 0 }, "source_rank_score": 104.80808, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "df177b1b43ebcb88", "codeword174_sha256_16": "136b5757a40ae6cc" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "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": 126, "llr_stats": { "count": 174, "avg_abs": 1.128603, "min_abs": 0.008687, "max_abs": 4.191314, "positive": 46, "negative": 128, "zero": 0 }, "source_rank_score": 104.514412, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "1deaddb66b489890", "codeword174_sha256_16": "d67680bf6760f7e3" }, { "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": 121, "llr_stats": { "count": 174, "avg_abs": 1.461699, "min_abs": 0.004606, "max_abs": 3.54107, "positive": 49, "negative": 125, "zero": 0 }, "source_rank_score": 123.846796, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "c9536416c7505249", "codeword174_sha256_16": "b716e17f5524d175" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 5.0, "tone_spacing_offset_hz": -0.03 }, "anchor_applied": { "start_seconds": 4.8, "base_freq_hz": 1030.0, "tone_spacing_hz": 1.845, "nsps": 6400 }, "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": 1030.0, "tone_spacing_hz": 1.845, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:14" }, "best_row": { "variant": "mapped_lsb_within_each_tone+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": 47, "llr_stats": { "count": 174, "avg_abs": 1.347502, "min_abs": 0.002411, "max_abs": 3.955787, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 105.390008, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "1c2e6d4c1a1e2ab1", "codeword174_sha256_16": "b348ee70b6a3483c" }, "top_rows": [ { "variant": "mapped_lsb_within_each_tone+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": 47, "llr_stats": { "count": 174, "avg_abs": 1.347502, "min_abs": 0.002411, "max_abs": 3.955787, "positive": 129, "negative": 45, "zero": 0 }, "source_rank_score": 105.390008, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "1c2e6d4c1a1e2ab1", "codeword174_sha256_16": "b348ee70b6a3483c" }, { "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_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": 0.915549, "min_abs": 0.000541, "max_abs": 3.70776, "positive": 135, "negative": 39, "zero": 0 }, "source_rank_score": 103.662196, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "4519b9b754d1204f", "codeword174_sha256_16": "d94e9095d6c6e93a" }, { "variant": "mapped_raw_msb+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": 140, "llr_stats": { "count": 174, "avg_abs": 1.96276, "min_abs": 0.028868, "max_abs": 4.041541, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 107.85104, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "f1cd8126e5c533e3", "codeword174_sha256_16": "16a4556bf802b492" }, { "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+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": 119, "llr_stats": { "count": 174, "avg_abs": 1.065423, "min_abs": 0.005117, "max_abs": 3.498813, "positive": 52, "negative": 122, "zero": 0 }, "source_rank_score": 104.261692, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "af85b2aafd15d647", "codeword174_sha256_16": "6b02d8170f5771ba" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_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": 51, "llr_stats": { "count": 174, "avg_abs": 0.938196, "min_abs": 8.5e-05, "max_abs": 3.107059, "positive": 127, "negative": 47, "zero": 0 }, "source_rank_score": 103.752784, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "1ef1df661b088fb2", "codeword174_sha256_16": "7dcdc2345950aa49" }, { "variant": "raw_msb_symbol_order", "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": 132, "llr_stats": { "count": 174, "avg_abs": 1.402685, "min_abs": 0.016119, "max_abs": 4.041541, "positive": 39, "negative": 135, "zero": 0 }, "source_rank_score": 123.61074, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "9efa82de730c504e", "codeword174_sha256_16": "9fc74ff7a5307a79" }, { "variant": "lsb_within_each_tone", "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": 132, "llr_stats": { "count": 174, "avg_abs": 1.602357, "min_abs": 0.016119, "max_abs": 3.889323, "positive": 38, "negative": 136, "zero": 0 }, "source_rank_score": 116.409428, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "9efa82de730c504e", "codeword174_sha256_16": "9fc74ff7a5307a79" }, { "variant": "mapped_lsb_within_each_tone+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": 140, "llr_stats": { "count": 174, "avg_abs": 1.96276, "min_abs": 0.028868, "max_abs": 4.041541, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 107.85104, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "128686bc8fd1c14d", "codeword174_sha256_16": "e1946ca31cb74111" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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": 28, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 5.0, "tone_spacing_offset_hz": 0.0 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1030.0, "tone_spacing_hz": 1.875, "nsps": 6400 }, "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": 1030.0, "tone_spacing_hz": 1.875, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step38_timing_boundary_sweep:28" }, "best_row": { "variant": "lab_mask_xor_preview", "transform": "raw_msb+no_interleaver", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 95, "llr_stats": { "count": 174, "avg_abs": 1.983812, "min_abs": 0.041058, "max_abs": 4.24207, "positive": 136, "negative": 38, "zero": 0 }, "source_rank_score": 99.935248, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "f2ef1762c906ef31", "codeword174_sha256_16": "c6cb32457e4c0ce8" }, "top_rows": [ { "variant": "lab_mask_xor_preview", "transform": "raw_msb+no_interleaver", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 95, "llr_stats": { "count": 174, "avg_abs": 1.983812, "min_abs": 0.041058, "max_abs": 4.24207, "positive": 136, "negative": 38, "zero": 0 }, "source_rank_score": 99.935248, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "f2ef1762c906ef31", "codeword174_sha256_16": "c6cb32457e4c0ce8" }, { "variant": "mapped_ft8_gray_alt_high_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", "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": 62, "llr_stats": { "count": 174, "avg_abs": 0.803329, "min_abs": 0.000439, "max_abs": 4.003245, "positive": 117, "negative": 57, "zero": 0 }, "source_rank_score": 103.213316, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "1ddf65b53765c405", "codeword174_sha256_16": "d21ebfe4fe19a48e" }, { "variant": "lab_mask_xor_preview", "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": 80, "llr_stats": { "count": 174, "avg_abs": 1.391376, "min_abs": 0.011395, "max_abs": 4.003245, "positive": 47, "negative": 127, "zero": 0 }, "source_rank_score": 97.565504, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "18e650f62fd5e09a", "codeword174_sha256_16": "7ffc3739b59e3fa2" }, { "variant": "mapped_lsb_within_each_tone+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": 59, "llr_stats": { "count": 174, "avg_abs": 1.384894, "min_abs": 0.012691, "max_abs": 3.864479, "positive": 122, "negative": 52, "zero": 0 }, "source_rank_score": 105.539576, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "cc70148368f3b858", "codeword174_sha256_16": "1efb9deb93117651" }, { "variant": "mapped_ft8_gray_alt_high_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": 131, "llr_stats": { "count": 174, "avg_abs": 1.347851, "min_abs": 2e-05, "max_abs": 3.94795, "positive": 42, "negative": 132, "zero": 0 }, "source_rank_score": 105.391404, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "5e6c6e2b61b907a6", "codeword174_sha256_16": "c23c8e48b4495a2e" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_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": 105, "llr_stats": { "count": 174, "avg_abs": 0.918547, "min_abs": 0.004101, "max_abs": 4.003245, "positive": 61, "negative": 113, "zero": 0 }, "source_rank_score": 103.674188, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "3223363eef47db07", "codeword174_sha256_16": "d7d8c2ca45f49a02" }, { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_alt_high_demap_msb_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": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 91, "llr_stats": { "count": 174, "avg_abs": 1.564828, "min_abs": 0.002818, "max_abs": 3.94795, "positive": 136, "negative": 38, "zero": 0 }, "source_rank_score": 98.259312, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "d976abd0f4c5e758", "codeword174_sha256_16": "9c0ea41469c0b0ac" }, { "variant": "lab_mask_xor_preview", "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": 82, "llr_stats": { "count": 174, "avg_abs": 1.355256, "min_abs": 0.002818, "max_abs": 4.003245, "positive": 50, "negative": 124, "zero": 0 }, "source_rank_score": 97.421024, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "d3b942034a3e8ac6", "codeword174_sha256_16": "58bfad37282e8343" } ], "warnings": [ "Step 38 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 38 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 38 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 38 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/step38_timing_boundary_sweep.json", "timing_best_candidate_json": "/decoders/js8_decoder/runtime/timing_boundary_sweep/step38_best_timing_fec_candidate.json" }, "decodes": [], "warnings": [ "Step 38 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_20260527T041823Z.zip", "url": "/logs/js8_decoder_lab_real_run_20260527T041823Z.zip", "size": 879022, "mtime_utc": "2026-05-27T04:28:02Z" }, { "name": "js8_decoder_lab_real_run_20260527T035634Z.zip", "url": "/logs/js8_decoder_lab_real_run_20260527T035634Z.zip", "size": 731839, "mtime_utc": "2026-05-27T04:06:07Z" }, { "name": "js8_decoder_lab_real_run_20260527T033514Z.zip", "url": "/logs/js8_decoder_lab_real_run_20260527T033514Z.zip", "size": 585516, "mtime_utc": "2026-05-27T03:44:19Z" }, { "name": "js8_decoder_lab_real_run_20260526T180620Z.zip", "url": "/logs/js8_decoder_lab_real_run_20260526T180620Z.zip", "size": 380494, "mtime_utc": "2026-05-26T18:17:38Z" }, { "name": "js8_decoder_lab_real_run_20260526T161453Z.zip", "url": "/logs/js8_decoder_lab_real_run_20260526T161453Z.zip", "size": 330478, "mtime_utc": 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"2026-05-27T03:44:19Z", "url": "/logs/20260527T034334Z_ldpc-soft-decode_manifest.json" } ], "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." }