- Uses libhydrasdr HIGH_DEFINITION decimation mode by default.
- Tuner controller extends TunerController since libhydrasdr owns the USB device, transfers and real to complex sample conversion.
- Tuners are still discovered by USB bus and port. The controller reads the USB serial string and opens the device by serial number.
- Samples are scaled by 2 to preserve existing levels (-6 dB otherwise).
- Streaming is stopped for sample rate changes because libhydrasdr replaces the sample converter in use by its streaming thread.
- Buffer sample count follows the delivered power-of-2 buffer size and adds the 1.25 MHz sample rate.
Co-authored-by: denny <dennis.sheirer@gmail.com>
* #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.
- 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>
- 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>
The nightly release build fails in the :jre task because setup-java now
resolves java-version '27' to Liberica 27.0.1, while runtimeZipOthers and
runtimeZipWindows download 27+36 (27.0.0) target JDKs. jlink requires the
target java.base version to exactly match its own version, so it exits 1.
Pin the host JDK to 27.0.0 so it matches the downloaded JDKs. Bump both
together when updating jdk_download_base in build.gradle.
Claude-Session: https://claude.ai/code/session_01TNQURTPv1or2s6qjnk4NMB
Co-authored-by: Dennis Sheirer <dennis.sheirer@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
