* #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>
- Fix two-channel synthesis asymmetry across polyphase channel boundaries.
- TwoChannelSynthesizerM2: replace incorrect 2-path polyphase split (which applied
different responses to each channel) with channel sum + prototype filter
modulated to the channel boundary (+FS/4).
- ComplexPolyphaseChannelizerM2: start on the middle block map when taps per
channel is odd so adjacent channel outputs are phase coherent.
- TwoChannelOutputProcessor: translate channel 2 by FS/2 using the absolute
block index parity derived from the even-sized dispatch batches.
- SynthesizerViewer: translate channel 2 before synthesis.
- Add TwoChannelSynthesizerM2Test for flat, symmetric boundary response.
Co-authored-by: denny <dennis.sheirer@gmail.com>
* 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>
* Add failing test for toCSV()
* Add missing " to timeslot value
* Add failing test for quotes and commas in details
* Separate comma and quote tests
* Escape toCSV cells using utility
* Use CSVFormatter instead of escape utils
Allows us to control exactly how we want to format a CSV-valid row.
* Never have a null cell
Instead of using a stream map, opting for an explicit handling so the logger can explode when an unexpected null shows up. Prevents the situation where things are mysteriously blank, forcing developers to handle known null scenarios.
