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276 Commits
Author SHA1 Message Date
sjg e7997f8492 [perf](trx-backend-soapysdr): use ring history for wfm resampler 
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 01:34:50 +01:00
sjgandClaude Opus 4.6 a6c3a85c8d [fix](trx-backend-soapysdr): match wfm sum/diff filter cutoffs at 18 kHz 
Raise both AUDIO_BW_HZ and STEREO_DIFF_BW_HZ to 18 kHz so the L+R and
L-R filter paths have identical group delay across the full audio band.
The previous mismatch (15.8 vs 14.5 kHz) caused frequency-dependent
phase errors in the stereo matrix that degraded real-world separation.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 01:31:34 +01:00
sjg f9691fee1e [perf](trx-backend-soapysdr): vectorize wfm discriminator angle 
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 01:30:41 +01:00
sjg 72219956d9 [perf](trx-backend-soapysdr): trim wfm resampler taps 
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 01:21:50 +01:00
sjgandClaude Opus 4.6 b2ce62646c [fix](trx-backend-soapysdr): improve wfm stereo blend threshold 
Raise the stereo blend floor from 0.55 to 0.75 at pilot lock and lower
the full-blend ceiling from stereo_detect_level 0.92 to 0.70.  This
gives real-world signals with moderate pilot strength much better L/R
separation (~17 dB immediately at lock vs ~5 dB before) and reaches
full unity blend sooner.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 01:20:38 +01:00
sjg 926a02e043 [perf](trx-backend-soapysdr): streamline wfm decode loop 
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 01:19:47 +01:00
sjg b42e557a25 [perf](trx-backend-soapysdr): pack iq fir filtering 
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 01:17:16 +01:00
sjg 198efa2092 [perf](trx-backend-soapysdr): update fir overlap in place 
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 01:13:10 +01:00
sjg 7a6467320b [perf](trx-backend-soapysdr): reuse fir scratch buffers 
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 01:10:34 +01:00
sjg ca0f236f4a [perf](trx-backend-soapysdr): reduce mixer and buffer overhead 
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 01:07:19 +01:00
sjg bec3fc72d3 [fix](trx-backend-soapysdr): widen wfm stereo image 
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 01:03:05 +01:00
sjg 6f37f9c66b [fix](trx-backend-soapysdr): refine wfm stereo tracking 
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 00:58:20 +01:00
sjg e84a0599fa [feat](trx-backend-soapysdr): add avx2 wfm hot paths 
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 00:52:53 +01:00
sjg 3e88c3f5d9 [feat](trx-backend-soapysdr): speed up fir and widen wfm resampler 
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 00:50:04 +01:00
sjg 5411607b63 [fix](trx-backend-soapysdr): honor frontend wfm bandwidth 
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 00:46:08 +01:00
sjg 17c70f89e5 [fix](trx-backend-soapysdr): fully reset wfm decoder on tune 
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 00:41:28 +01:00
sjg fdcc732c83 [fix](trx-backend-soapysdr): retune wfm fir window 
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 00:38:44 +01:00
sjg b0d8ce8e29 [fix](trx-backend-soapysdr): restore wfm agc and cutoffs 
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 00:35:19 +01:00
sjgandOpenAI Codex a6847742d9 [fix](trx-backend-soapysdr): keep wfm discriminator state across blocks 
Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 00:31:41 +01:00
sjgandOpenAI Codex a8ed9e8fa4 [fix](trx-backend-soapysdr): lower wfm internal rate ceiling 
Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 00:24:33 +01:00
sjgandOpenAI Codex a25182ea3f [fix](trx-backend-soapysdr): drop wfm limiter and widen cutoffs 
Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 00:20:41 +01:00
sjgandOpenAI Codex 3b277da243 [fix](trx-backend-soapysdr): make wfm limiter bass-insensitive 
Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 00:10:54 +01:00
sjgandOpenAI Codex 206696acc5 [feat](trx-backend-soapysdr): add adaptive wfm stereo blend 
Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 00:07:13 +01:00
sjgandOpenAI Codex 5060522541 [fix](trx-backend-soapysdr): add wfm limiter and restore cutoffs 
Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 00:02:19 +01:00
sjgandOpenAI Codex b6f0a9967d [fix](trx-backend-soapysdr): improve wfm stereo separation trim 
Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-03-01 00:00:31 +01:00
sjgandOpenAI Codex 32822effda [fix](trx-backend-soapysdr): retune wfm sum and diff cutoffs 
Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 23:55:17 +01:00
sjgandOpenAI Codex 635d2b39bb [fix](trx-backend-soapysdr): add stereo diff high-pass and headroom 
Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 23:51:26 +01:00
sjgandOpenAI Codex 9453c90dac [fix](trx-backend-soapysdr): retune wfm stereo difference path 
Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 23:41:07 +01:00
sjgandOpenAI Codex 0dd91a952b [fix](trx-backend-soapysdr): add headroom to wfm stereo matrix 
Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 23:38:18 +01:00
sjgandOpenAI Codex 6d466f44d2 [fix](trx-backend-soapysdr): narrow wfm stereo difference band 
Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 23:37:08 +01:00
sjgandOpenAI Codex 9e49bfbcc8 [fix](trx-backend-soapysdr): latch full stereo blend after lock 
Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 23:34:43 +01:00
sjgandOpenAI Codex 617255cd32 [feat](trx-rs): expose live sdr gain control 
Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 23:30:08 +01:00
sjgandOpenAI Codex 93e507606e [feat](trx-server,trx-backend-soapysdr): add sdr gain ceiling 
Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 23:23:41 +01:00
sjgandOpenAI Codex dbeec9fb39 [feat](trx-backend-soapysdr): use fir resampler for wfm audio 
Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 23:17:15 +01:00
sjgandOpenAI Codex 5a6ff1427a [fix](trx-client,trx-backend-soapysdr): improve rig switching and fm agc 
Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 23:06:53 +01:00
sjgandOpenAI Codex 8440fe164b [fix](trx-backend-soapysdr): reduce wfm audio cutoff 
Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 22:54:03 +01:00
sjgandOpenAI Codex 735c9a7f07 [fix](trx-backend-soapysdr): bypass agc for wfm audio 
Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 22:38:54 +01:00
sjgandOpenAI Codex 3ccda5fb5a [fix](trx-backend-soapysdr,trx-frontend-http): reset stereo state and soften wfm top end 
Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 22:34:54 +01:00
sjgandCodex b6053729a4 [fix](trx-backend-soapysdr): emit proper stereo pcm frames 
Co-authored-by: Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 22:07:34 +01:00
sjgandCodex df1bbf8f5b [fix](trx-rs): remove wfm denoise and default stereo audio 
Co-authored-by: Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 22:01:17 +01:00
sjgandCodex d6c89bcc6b [fix](trx-backend-soapysdr): tighten wfm pilot detect and stereo agc 
Co-authored-by: Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 21:51:36 +01:00
sjgandCodex b722787ada [feat](trx-rs): show live wfm stereo detect state 
Co-authored-by: Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 21:44:32 +01:00
sjgandCodex 862f0200bb [fix](trx-backend-soapysdr): tune wfm stereo separation trim 
Co-authored-by: Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 21:39:35 +01:00
sjgandCodex 73fe9d52ff [fix](trx-backend-soapysdr): improve wfm stereo separation 
Co-authored-by: Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 21:34:31 +01:00
sjgandCodex a456864957 [fix](trx-backend-soapysdr): restore wfm stereo separation 
Co-authored-by: Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 21:26:32 +01:00
sjgandClaude Opus 4.6 eb740dbb43 [fix](trx-backend-soapysdr): add missing wfm_denoise arg in dsp tests 
Fix pre-existing compilation failures in four test call sites that were
missing the wfm_denoise: bool argument added to ChannelDsp::new() and
SdrPipeline::start().

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 20:43:10 +01:00
sjgandClaude Opus 4.6 bbc7e857e5 [fix](trx-backend-soapysdr): improve WFM stereo demodulation quality 
- Raise audio LPF cutoff from 15 kHz to 17 kHz to pass full FM stereo
  audio bandwidth without excessive HF rolloff
- Replace 2-point linear interpolation resampler with 4-point Hermite
  cubic spline for a much flatter passband up to 17 kHz
- Add FM discriminator gain normalization (fm_gain = fs / 150000) so
  ±75 kHz deviation maps to ±1.0 regardless of composite sample rate,
  stabilizing stereo carrier amplitude reconstruction
- Double pilot PLL proportional (0.0015→0.003) and integral
  (0.00002→0.00005) gains for faster lock and better tracking

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 20:43:01 +01:00
sjgandCodex 3d8fd32488 [fix](trx-backend-soapysdr): prevent double agc on mono wfm 
Co-authored-by: Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 20:30:12 +01:00
sjgandCodex 244f91d97b [fix](trx-backend-soapysdr,trx-frontend-http): make wfm mono mode real 
Co-authored-by: Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 20:25:04 +01:00
sjgandClaude Sonnet 4.6 b7c1da138b [fix](trx-backend-soapysdr): fix WFM stereo separation 
The 19 kHz pilot notch was applied only to the L+R sum path, introducing
~22° of phase shift at 15 kHz relative to the L-R diff path.  This phase
mismatch caused interchannel crosstalk (≈ −14 dB separation at 15 kHz).

Fix: remove the notch from the sum processing chain so both sum and diff
pass through identical 4th-order Butterworth LPFs, giving phase-coherent
demodulation across the full audio band.  The notch is relocated to the
mono output branch where phase alignment with the diff channel is not
required.  Pilot rejection on the stereo L/R outputs is still adequate
(~28 dB) from the combined LPF + deemphasis response at 19 kHz.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
 2026-02-28 20:11:15 +01:00