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#2516 DMR Decoder enhancements. Architecture now shares common C4FM framework like P25P1 and NXDN. Adds soft decoding and enhanced/corrected error detection and correction. (#2517)

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Co-authored-by: denny <dennis.sheirer@gmail.com>
This commit is contained in:
Denny Sheirer
2026-10-26 06:34:57 -04:00
committed by GitHub
parent 5635341d12
commit f2c98cdb40
32 changed files with 4044 additions and 1282 deletions
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21
src/main/java/io/github/dsheirer/dsp/c4fm/C4FMEqualizer.java
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@@ -179,6 +179,27 @@ public class C4FMEqualizer
mSymbolsUntilTraining = mDelaySymbolCount;
}
/**
* Notifies the equalizer that a sync pattern is detected and updates the sync pattern used for training. This
* supports protocols (ie DMR) that employ multiple sync patterns of the same length.
* @param syncSymbols for the detected sync pattern, which must be the same length as the constructor sync pattern.
*/
public void syncDetected(float[] syncSymbols)
{
if(syncSymbols.length != mReversedSyncSymbols.length)
{
throw new IllegalArgumentException("Sync symbols length [" + syncSymbols.length +
"] must match the equalizer sync pattern length [" + mReversedSyncSymbols.length + "]");
}
for(int x = 0; x < syncSymbols.length; x++)
{
mReversedSyncSymbols[syncSymbols.length - x - 1] = syncSymbols[x];
}
syncDetected();
}
/**
* Indicates that the sync patter is lost and the equalizer should reset.
*/