{ "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." }