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#296 APCO25 Phase II Decoder Implementation (#589)

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P25 Phase 2 Decoder implementation.
This commit is contained in:
Denny Sheirer
2019-11-17 06:56:52 -05:00
committed by GitHub
parent d5b802e794
commit f934676bd0
561 changed files with 35609 additions and 6215 deletions
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58
src/main/java/io/github/dsheirer/dsp/psk/InterpolatingSampleBufferInstrumented.java
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@@ -1,36 +1,54 @@
/*******************************************************************************
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
/*
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
* * ******************************************************************************
* * Copyright (C) 2014-2019 Dennis Sheirer
* *
* * This program is free software: you can redistribute it and/or modify
* * it under the terms of the GNU General Public License as published by
* * the Free Software Foundation, either version 3 of the License, or
* * (at your option) any later version.
* *
* * This program is distributed in the hope that it will be useful,
* * but WITHOUT ANY WARRANTY; without even the implied warranty of
* * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* * GNU General Public License for more details.
* *
* * You should have received a copy of the GNU General Public License
* * along with this program. If not, see <http://www.gnu.org/licenses/>
* * *****************************************************************************
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
*/
package io.github.dsheirer.dsp.psk;
import io.github.dsheirer.sample.complex.Complex;
import io.github.dsheirer.sample.complex.ComplexSampleListener;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class InterpolatingSampleBufferInstrumented extends InterpolatingSampleBuffer
{
private final static Logger mLog = LoggerFactory.getLogger(InterpolatingSampleBufferInstrumented.class);
private SymbolDecisionData mSymbolDecisionData;
private ComplexSampleListener mSampleListener;
private int mBufferLength;
public InterpolatingSampleBufferInstrumented(float samplesPerSymbol, float symbolTimingGain)
{
super(samplesPerSymbol, symbolTimingGain);
mSymbolDecisionData = new SymbolDecisionData((int)samplesPerSymbol);
mBufferLength = (int)Math.ceil(samplesPerSymbol);
mSymbolDecisionData = new SymbolDecisionData(mBufferLength);
}
public void receive(Complex sample)
{
super.receive(sample);
mSymbolDecisionData.receive(sample);
if(mSampleListener != null)
{
mSampleListener.receive(sample.inphase(), sample.quadrature());
}
}
/**
@@ -40,8 +58,22 @@ public class InterpolatingSampleBufferInstrumented extends InterpolatingSampleBu
*/
public SymbolDecisionData getSymbolDecisionData()
{
for(int x = mDelayLinePointer; x < mDelayLinePointer + mBufferLength; x++)
{
mSymbolDecisionData.receive(mDelayLineInphase[x], mDelayLineQuadrature[x]);
}
mSymbolDecisionData.setSamplingPoint(getSamplingPoint());
return mSymbolDecisionData;
}
/**
* Sets the listener to receive samples being sent to this buffer. Note: these samples have
* already been corrected by the PLL, so this provides an ideal tap point for PLL corrected samples.
* @param listener to receive samples.
*/
public void setSampleListener(ComplexSampleListener listener)
{
mSampleListener = listener;
}
}