- RRC_ALPHA 0.75→0.50: narrower noise BW, ~0.6 dB SNR gain
- COSTAS_KI 3.5e-7: maintain ζ≈0.68 (1e-6 caused loop instability)
- Soft confidence: use biphase_i.abs() instead of full vector magnitude
so OSD confidence is aligned with bit-decision sign; suppresses
false groups under noise with residual Costas phase error
- OSD(2) in locked mode: corrects ≤2-bit errors after block sync
- Search mode: hard decode only for Block A; OSD(1) in search yielded
~13% false Block A rate per bit, letting wrong clock candidates
accumulate false groups as fast as the correct candidate
- Incumbent candidate tracking (best_candidate_idx): the winning
candidate updates best_state at equal score; challengers need strictly
higher score; best_score tracks incumbent even on no-state-change
groups so challengers can't leapfrog on a single false group
- blocks_to_chips: add NRZI (NRZ-Mark) pre-encoding so the differential
biphase decoder recovers actual data bits rather than XOR-of-pairs
- Add blocks_to_chips_round_trips_all_groups test: verifies all 16 blocks
across 4 PS segments round-trip correctly without BPSK modulation
[fix](trx-backend-soapysdr): lower pilot lock threshold for weak-signal RDS
- PILOT_LOCK_THRESHOLD 0.25→0.20, add PILOT_LOCK_ONSET=0.30 constant
- Pilot reference engages at coherence ≥0.36 (was ≥0.45)
WIP: end_to_end_clean_signal_decodes_ps still failing (13/15 pass).
Decoder skips segment 2 due to ISI from rectangular test chips through
RRC receive filter. chips_to_rds_signal needs RRC pulse shaping.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
Lower PILOT_LOCK_THRESHOLD 0.5 -> 0.25 so the accurate 57 kHz pilot-derived
carrier reference is handed to the RDS decoder even with a weaker pilot tone.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
- Add single-bit flip fallback in search mode (push_bit_soft) so Block A
can be acquired with one bit error, matching locked-mode OSD(1) behaviour
- Lower MIN_PUBLISH_QUALITY 0.38 -> 0.20 for earlier publish on noisy signals
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
- Replace FirFilter (ring-buffer FIR) with FftRrcFilter using overlap-save
FFT convolution; I and Q are processed together as a single complex FFT,
halving filter cost (~10x fewer operations than direct convolution)
- Reduce PHASE_CANDIDATES 16 -> 8 (reasonable, double the original)
- Lower MIN_PUBLISH_QUALITY 0.55 -> 0.38 (more permissive acquisition)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
The IQ prefilter cutoff was audio_bandwidth_hz/2, so any setting below
~120 kHz would cut off the 57 kHz RDS subcarrier before FM demod.
- Clamp IQ prefilter cutoff to >= 60 kHz for WFM in both new() and
rebuild_filters() — audio quality is unaffected since WfmStereoDecoder
applies its own 18 kHz lowpass internally
- Ensure pipeline target rate >= 120 kHz for WFM so the decimated IQ
sample rate can represent the 60 kHz cutoff
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
- Downgrade OSD from distance-2 to distance-1 (removes 325-iteration
double-bit flip loop per block, main source of both false positives
and excess CPU)
- Reduce phase candidates from 8 to 4 (halves per-sample work)
- Raise MIN_PUBLISH_QUALITY from 0.45 to 0.65 (requires stronger
signal confidence before emitting decoded state)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
Track per-rig server connection state in `rig_server_connected` so that when
one trx-server drops, only the rig(s) it serves are marked disconnected. Other
rigs with active connections remain fully interactive. The SSE `server_connected`
field is now resolved from the per-rig map for the session's active rig, falling
back to the global flag for backward compatibility.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
Tech 1: replace one-pole baseband LPF with FIR RRC matched filter
(alpha=0.75, 4-chip span) — largest single measured improvement per
empirical comparison (gr-rds RRC vs plain FIR: 32/38 vs 18/38 stations).
Tech 2: 19 kHz pilot x3 -> 57 kHz coherent carrier reference via the
triple-angle formula; fed from the WFM pilot Costas PLL when
pilot_lock_level > 0.5, clearing to NCO fallback otherwise.
Tech 3/7/8: OSD(2) soft-decision block decoder replaces hard CRC check.
Per-bit soft magnitudes accumulated in Candidate::block_soft[26].
decode_block_soft() searches Hamming distance 0/1/2 (352 trials total)
and returns the minimum Euclidean-cost valid codeword; ~2-3 dB gain.
Tech 4: 8th-order 57 kHz BPF (4 cascaded biquads at Q=5) in wfm.rs
replaces the previous single Q=10 biquad; ~6x steeper ACI stopband.
Tech 5: Costas loop with tanh soft phase detector drives the RDS carrier
NCO when no pilot reference is available (P+I, B_L ~20 Hz).
Tech 6: Block A PI field LLR accumulation — signed per-bit LLR summed
over 3 independent Block A observations before committing the PI value,
correcting weak-signal false locks without delaying strong-signal lock.
Tech 9: 8-tap complex CMA blind equalizer applied to IQ samples before
FM discrimination; constant-modulus error (|y|^2 - R^2) drives tap
adaptation without a training sequence, suppressing adjacent-channel
interference at the source.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
Use saturating CAS loop in adjust_total_count to prevent AtomicUsize underflow, and cap history estimate at 500k entries.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
Remove overkill peak frequency labels from spectrum view. Set waterfall
height to match spectrum height (1:1 split) instead of fixed 120px.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
Add 8 enhancements to the spectrum display:
1. Noise floor reference line — dashed horizontal line at estimated
noise floor (15th-percentile heuristic)
2. Peak frequency labels — top 5 strongest peaks labeled with
frequency text on the spectrum canvas
3. Crosshair lines — vertical + horizontal guide lines follow
cursor on hover for precise frequency/dB reading
4. Zoom indicator + minimap — shows current zoom level (e.g. "4.0x")
and a minimap showing the visible window within the full span
5. dB range control — new Range input alongside Floor, with Auto
button updating both; allows direct control of vertical span
6. Keyboard shortcuts — Arrow Left/Right to pan, +/- to zoom,
0 to reset zoom; documented in hint bar
7. Full waterfall panel — WebGL waterfall canvas below the spectrum
plot, synchronized with zoom/pan, with scroll/click/drag support
8. Signal overlay extended — overlay height now includes waterfall
canvas for consistent BW/bookmark/freq marker coverage
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
Add 8 enhancements to the spectrum display:
1. Noise floor reference line — dashed horizontal line at estimated
noise floor (15th-percentile heuristic)
2. Peak frequency labels — top 5 strongest peaks labeled with
frequency text on the spectrum canvas
3. Crosshair lines — vertical + horizontal guide lines follow
cursor on hover for precise frequency/dB reading
4. Zoom indicator + minimap — shows current zoom level (e.g. "4.0x")
and a minimap showing the visible window within the full span
5. dB range control — new Range input alongside Floor, with Auto
button updating both; allows direct control of vertical span
6. Keyboard shortcuts — Arrow Left/Right to pan, +/- to zoom,
0 to reset zoom; documented in hint bar
7. Full waterfall panel — WebGL waterfall canvas below the spectrum
plot, synchronized with zoom/pan, with scroll/click/drag support
8. Signal overlay extended — overlay height now includes waterfall
canvas for consistent BW/bookmark/freq marker coverage
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
Nudge state watch when server_connected goes false so SSE delivers the change. Frontend applies a desaturated frost + banner instead of a blocking overlay, keeping the last-known state visible.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
The map module was tagging all decode markers (APRS, AIS, VDES,
FT8/FT4/FT2/WSPR locators) with the global rig picker's active rig
instead of the actual source rig. This made the map's own rig filter
dropdown ineffective in multi-rig setups.
- Add rig_id field to all decode message structs (AisMessage,
VdesMessage, AprsPacket, CwEvent, Ft8Message, WsprMessage)
- Set rig_id on messages in audio_client before broadcasting, using
the actual rig connection identifier
- Update history collector to prefer message rig_id over the global
active rig fallback
- Pass rig_id through plugin normalize functions (AIS, APRS, VDES,
HF-APRS) so it reaches the map add functions
- Update all map marker functions (aprsMapAddStation, aisMapAddVessel,
vdesMapAddPoint, mapAddLocator) to use the message's rig_id with
fallback to the global picker for backward compatibility
https://claude.ai/code/session_015gC7axHk2jmp7HbFPdbivN
Signed-off-by: Claude <noreply@anthropic.com>
Drop the plugin loading infrastructure (libloading-based dynamic .so/.dylib/.dll
loading) from both trx-server and trx-client. The feature was unused and posed an
unnecessary security risk by executing arbitrary native code from disk.
Removed:
- src/trx-app/src/plugins.rs (plugin discovery, validation, FFI registration)
- examples/trx-plugin-example/ (cdylib example plugin)
- libloading dependency from trx-app
- load_backend_plugins / load_frontend_plugins calls from server and client
- Plugin documentation from README.md and CLAUDE.md
https://claude.ai/code/session_01DTEUpz3XPUeWmz74NeaFgb
Signed-off-by: Claude <noreply@anthropic.com>
Update all SDR command handlers in rig_task to access SDR methods via
ctx.rig.as_sdr() instead of calling them directly on RigCat. Query-only
SDR operations (filter_state, get_spectrum, get_vchan_rds) use
as_sdr_ref(). Non-SDR rigs now get proper not_supported errors.
https://claude.ai/code/session_01XzurkeuUmamBuhQwxVy7T4
Signed-off-by: Claude <noreply@anthropic.com>
Extract 13 SDR-specific methods (set_center_freq, set_bandwidth,
set_sdr_gain/lna/agc/squelch/nb, set_wfm_*, filter_state, get_spectrum,
get_vchan_rds) into a new RigSdr trait. RigCat retains core CAT
operations and gains as_sdr()/as_sdr_ref() for optional SDR access.
Non-SDR backends no longer see SDR methods in their trait impl.
https://claude.ai/code/session_01XzurkeuUmamBuhQwxVy7T4
Signed-off-by: Claude <noreply@anthropic.com>
Replace all .unwrap() on RwLock/Mutex acquisitions with
.unwrap_or_else(|e| e.into_inner()) to gracefully recover from poisoned
locks instead of panicking. Add lock ordering documentation to the
module header to prevent deadlocks.
https://claude.ai/code/session_01XzurkeuUmamBuhQwxVy7T4
Signed-off-by: Claude <noreply@anthropic.com>
Add an AtomicUsize total_count field to DecoderHistories, maintained by
record/prune/clear methods, so estimated_total_count() avoids 9 separate
mutex acquisitions. Also replace audio ring buffer .unwrap() calls with
.unwrap_or_else(|e| e.into_inner()) to recover from poisoned locks.
https://claude.ai/code/session_01XzurkeuUmamBuhQwxVy7T4
Signed-off-by: Claude <noreply@anthropic.com>
sjg
Claude