GitHub/sdrtrunk
1
0
Fork 0
mirror of https://github.com/DSheirer/sdrtrunk.git synced 2026-11-12 08:37:25 -05:00
Code Issues Packages Projects Releases 2 Wiki Activity

Updates to P25-C4FM decoder filtering and frequency correction.

Browse Source
This commit is contained in:
denny
2015-11-30 19:59:06 -05:00
parent ebb59f5181
commit ed91c617d9
2 changed files with 5 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
src/module/decode/p25/C4FMSymbolFilter.java
View File

@@ -260,9 +260,6 @@ public class C4FMSymbolFilter implements FrequencyCorrectionResetListener,
// .getErrorCorrection() );
mFrequencyAdjustmentRequested = 0;
/* reset internal frequency error tracker */
mCoarseFrequencyCorrection = 0;
}
}

7
src/module/decode/p25/P25_C4FMDecoder.java
View File

@@ -24,6 +24,7 @@ import instrument.tap.stream.FloatBufferTap;
import instrument.tap.stream.FloatTap;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.slf4j.Logger;
@@ -74,8 +75,10 @@ public class P25_C4FMDecoder extends P25Decoder implements IRealBufferListener
super( aliasList );
/* Filter demodulated sample buffers */
mC4FMPreFilter = new RealFIRFilter_RB_RB( FilterFactory.getLowPass(
48000, 6750, 7500, 60, WindowType.HANNING, true ), 1.0f );
float[] filter = FilterFactory.getLowPass( 48000, 2500, 4000, 80, WindowType.HANNING, true );
mLog.debug( "Filter taps:" + filter.length + " co:" + Arrays.toString( filter ) );
mC4FMPreFilter = new RealFIRFilter_RB_RB( filter, 1.0f );
/* Issue tuned frequency correction commands, remotely controlled by the
* downstream symbol filter */