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330 WIP - implements the new data-directed symbol timing and phase

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error calculator.  After increasing the gain for symbol timing, this
new symbol evaluator class seems to track the signal very accurately
despite lots of noise and ISI.
This commit is contained in:
Denny
2018-03-04 11:42:23 -05:00
parent b563f2d11b
commit 45a6c5a0b6
9 changed files with 58 additions and 76 deletions
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8
src/main/java/io/github/dsheirer/dsp/psk/InterpolatingSampleBuffer.java
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@@ -31,7 +31,7 @@ public class InterpolatingSampleBuffer
private int mTwiceSamplesPerSymbol;
private float mSamplingPoint;
private float mSampleCounterGain = 0.05f;
private float mSampleCounterGain = 1.0f;
private float mDetectedSamplesPerSymbol;
private float mDetectedSamplesPerSymbolGain = 0.1f * mSampleCounterGain * mSampleCounterGain;
private float mMaximumSamplesPerSymbol;
@@ -130,7 +130,7 @@ public class InterpolatingSampleBuffer
*/
public Complex getPrecedingSample()
{
mPrecedingSample.setValues(mDelayLineInphase[mDelayLinePointer + 3], mDelayLineQuadrature[mDelayLinePointer + 3]);
mPrecedingSample.setValues(mDelayLineInphase[mDelayLinePointer + 4], mDelayLineQuadrature[mDelayLinePointer + 3]);
return mPrecedingSample;
}
@@ -152,7 +152,7 @@ public class InterpolatingSampleBuffer
*/
public float getInphase(float interpolation)
{
return mInterpolator.filter(mDelayLineInphase, mDelayLinePointer, interpolation);
return mInterpolator.filter(mDelayLineInphase, mDelayLinePointer + 1, interpolation);
}
/**
@@ -162,6 +162,6 @@ public class InterpolatingSampleBuffer
*/
public float getQuadrature(float interpolation)
{
return mInterpolator.filter(mDelayLineQuadrature, mDelayLinePointer, interpolation);
return mInterpolator.filter(mDelayLineQuadrature, mDelayLinePointer + 1, interpolation);
}
}