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HackRF - final check-in. Changed all tuners to use the low-level API of the usb4java library to resolve limitation in high-level API that constrains maximum sample rate to ~2.0 MHz. Added console logging to logback.

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dennis.sheirer
2014-10-20 23:09:50 +00:00
parent 8d60397547
commit 5f4e7652bd
29 changed files with 2297 additions and 1971 deletions
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15
src/decode/am/AMDecoder.java
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@@ -6,6 +6,9 @@ import decode.Decoder;
import decode.DecoderType;
import dsp.am.AMDemodulator;
import dsp.filter.DCRemovalFilter2;
import dsp.filter.FilterFactory;
import dsp.filter.FloatFIRFilter;
import dsp.filter.Window.WindowType;
public class AMDecoder extends Decoder
{
@@ -13,10 +16,11 @@ public class AMDecoder extends Decoder
* This value determines how quickly the DC remove filter responds to
* changes in frequency.
*/
private static final double DC_REMOVAL_RATIO = 0.000003;
private static final double DC_REMOVAL_RATIO = 0.003;
private AMDemodulator mDemodulator;
private DCRemovalFilter2 mDCRemovalFilter;
private FloatFIRFilter mLowPassFilter;
public AMDecoder( SampleType sampleType )
{
@@ -50,7 +54,14 @@ public class AMDecoder extends Decoder
* Route the demodulated, filtered samples back to this class to send
* to all registered listeners
*/
mDCRemovalFilter.setListener( this.getFloatReceiver() );
mLowPassFilter = new FloatFIRFilter(
FilterFactory.getLowPass( 48000, 3000, 31,
WindowType.COSINE ), 100.0 );
mDCRemovalFilter.setListener( mLowPassFilter );
mLowPassFilter.setListener( this.getFloatReceiver() );
}
}