* #2535 Heterodyne Channelizer enhancements and corrections.
* #2537 Complex vector oscillator SIMD lane drift.
Realigns the SIMD lanes every 262,144 samples. At frequencies where the
rotation for a set of lanes is nearly a whole or half turn, rounding affects
each lane differently and the lanes drift apart until the next frequency
change, producing spurs at multiples of the sample rate divided by the lane
count. Lane phase error at 3125 Hz with a 50 kHz sample rate was about -38 dBc
after one hour and is now about -83 dBc with 16 lanes and -73 dBc with 8 lanes.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* #2537 test updates
* #2537 test updates
---------
Co-authored-by: denny <dennis.sheirer@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
* Uses same shared architecture and symbol processor pattern as other C4FM decoders.
* Adds soft symbol processing and sync detection.
* Removes RRC filter and replaces with improved channel filter.
* Viterbi soft symbol decoding with demodulator reliability weighting
* Improved sync reacquisition in low SNR
* Improved handling for phase wrapping and interpolation
* NAC Tracker updated to track by NAC count
* Native buffers returning partial buffers
* Message processor uses only valid LDU1 words
* Reduced phantom TDU messages
* Tuner/Channe frequency error corrections don't reset the symbol trackers and fix possible divide by zero error
* LSM timing error detector now updates per symbol block size instead of sample buffer size - faster convergence
* New unit tests
* Resolves several issues, including a lagging sync detect offset issue in the recently updated P25P1 C4FM decoder.
* Consolidate filter designers for each protocol back into the FilterFactory class.
* DMR, P25 Phase 1 C4FM and LSM, and P25 Phase 2 decoders design the baseband filter once and share the taps across the I and Q filters.
Co-authored-by: denny <dennis.sheirer@gmail.com>
