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#2494 P25P1 and NXDN Decoder Enhancements. (#2514)

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- 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>
This commit is contained in:
Denny Sheirer
2026-10-25 09:44:50 -04:00
committed by GitHub
parent df739f525f
commit 5635341d12
51 changed files with 4035 additions and 1504 deletions
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2
src/main/java/io/github/dsheirer/source/config/SourceConfigTunerMultipleFrequency.java
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@@ -39,7 +39,7 @@ public class SourceConfigTunerMultipleFrequency extends SourceConfiguration
private List<Long> mFrequencies = new ArrayList<>();
private String mPreferredTuner;
private Long mPreferredFrequency;
private int mFrequencyRotationDelay = ChannelRotationMonitor.CHANNEL_ROTATION_DELAY_MINIMUM;
private int mFrequencyRotationDelay = ChannelRotationMonitor.CHANNEL_ROTATION_DELAY_DEFAULT;
public SourceConfigTunerMultipleFrequency()
{