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P25 - work in progress to improve CQPSK LSM audio output. Audio output is still choppy but greatly improved over the previous test release.

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This commit is contained in:
dennis.sheirer
2015-04-25 23:21:20 +00:00
parent 505f2ca474
commit c12123a81b
32 changed files with 1009 additions and 338 deletions
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6
src/sample/adapter/ByteSampleAdapter.java
View File

@@ -31,10 +31,10 @@ public class ByteSampleAdapter extends SampleAdapter
for( int x = 0; x < 256; x++ )
{
LOOKUP_VALUES[ x ] = (float)( x - 128 );
LOOKUP_VALUES[ x ] = (float)( x - 127 ) / 128.0f;
}
LOOKUP_VALUES[ 128 ] = 0.0000001f;
//
// LOOKUP_VALUES[ 128 ] = 0.0000001f;
}
@Override

34
src/sample/complex/ComplexSample.java
View File

@@ -284,18 +284,42 @@ public class ComplexSample implements Serializable
return new ComplexSample( (float)Math.cos( angle ),
(float)Math.sin( angle ) );
}
/**
* Angle of this sample in radians
*/
public float angle()
{
return (float)Math.atan2( y(), x() );
}
/**
* Provides an approximate magnitude value for this sample.
*/
public float envelope()
{
float realAbsolute = realAbsolute();
float imagAbsolute = imaginaryAbsolute();
if( realAbsolute > imagAbsolute )
{
return realAbsolute + ( 0.4f * imagAbsolute );
}
else
{
return imagAbsolute + ( 0.4f * realAbsolute );
}
}
public static void main( String[] args )
{
ComplexSample sample1 = new ComplexSample( .45f, .45f );
ComplexSample sample2 = new ComplexSample( .25f, .25f );
ComplexSample sample1_2 = ComplexSample.subtract( sample1, sample2 );
ComplexSample s1 = new ComplexSample( 0.24414134f, -0.6026385f );
ComplexSample s2 = new ComplexSample( -0.09531293f, -0.7052474f );
ComplexSample symbol = ComplexSample.multiply( s1, s2.conjugate() );
mLog.debug( sample1_2.toString() );
mLog.debug( "S1 Mag:" + s1.magnitude() + " S2 Mag:" + s2.magnitude() + " SymMag:" + symbol.magnitude() );
mLog.debug( "S1:" + s1 + " S2:" + s2 + " Symbol:" + symbol );
}
}