sjg
3877de3c4f
Replace broken hard-decision pipeline with proper soft-decision decoding matching the WSJT-X wsprd reference implementation. Key fixes: soft-symbol demodulation using amplitude differences, soft-decision Fano decoder with Es/No=6dB metric table and delta=60 threshold, deinterleave preserving soft values instead of extracting hard bits, convolutional tail constraint, and normalized sync correlation scoring. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: Stan Grams <sjg@haxx.space>