* #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>
Persist the per-channel selection, preserve it when copying configurations, and transfer it to mixed-phase P25 traffic channels. Apply only when the loaded codec advertises support. Calibrated levels remain the default.
* Adopts same architecture and symbol processor as P1 C4FM/LSM, DMR and NXDN.
* Soft symbol sync detection, processing and erro correction.
* Scalar and vector soft sync detection and calibration
* Improved time slot detection/prediction and ISCH processing.
* Fixes bug in parsing sequential mac structures in SACCH
* Vector calibration(s) cleanup across multiple calibrations
* Error correction bug in ISCH
* Renames differential demod shared with P1 LSM decoder.
Co-authored-by: denny <dennis.sheirer@gmail.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>
- Updates P25P1 C4FM decoder to use same pattern developed for NXDN.
- Both share the C4FM symbol processor and equalizer.
- P25P1 updated with Garner style timing error detector
- NXDN filters updated to use a combined RRC and inverse sync filter all in one.
- P25P1 replaces RRC with band limiting filter
- P25P1 enhanced with dynamic PLL balance updates to combat multi-path fading, in addition to the sync detection training window.
- Decoder PPM error reports now only sent after 2x consecutive sync detections to prevent tuner PPM corrections from noisy/isolated false sync detects.
- Soft error correction added to both P25P1 and IDEN.
Co-authored-by: denny <dennis.sheirer@gmail.com>
SuperFrameFragment.getTimeslotOffset() tests getIISCH1().isValid() twice,
so the second I-ISCH is never consulted and a fragment whose first I-ISCH
does not decode is descrambled at timeslot offset 0. On a weak signal
the first I-ISCH fails on almost half of the fragments, and two of every
three of those are then descrambled with the wrong phase. Test I-ISCH 2
as the surrounding code intends (isFinalFragment() already does).
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>
* Modified P25P1 MBE ESS order. ESS will now be populated after LDU2, not at the beginning of LDU2
* Added a version field and incremented it to '2' to signify a breaking change in the order of P25P1 ESS placement.
C4FM now uses SIMD differential decoding and soft sync detection.
LSM updated with soft sync detector and retains original Gardner error detector.
Adds new QPSK symbol view in the now playing channel tab.
Restores PLL error driven tuner Auto-PPM feature.
Deletes the demod viewer GUI application and all instrumented decoders
Updates DMR to send soft symbols to new symbol view in Now Playing.
Co-authored-by: Dennis Sheirer <dsheirer@github.com>
