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[WIP] channelizer and 1/2 channel output processors along with the 2

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channel synthesizer ... all appear to be functional.
This commit is contained in:
Denny
2018-01-28 10:52:53 -05:00
parent e78d2339ff
commit fcd3c2fd46
6 changed files with 15 additions and 46 deletions
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2
src/main/java/io/github/dsheirer/dsp/filter/FilterFactory.java
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@@ -740,7 +740,7 @@ public class FilterFactory
public static float[] getSincM2Channelizer(double channelBandwidth, int channels, int tapsPerChannel,
Window.WindowType windowType, boolean logResults) throws FilterDesignException
{
return getSincFilter(channelBandwidth * channels * 2.0, channelBandwidth,
return getSincFilter(channelBandwidth * channels, channelBandwidth,
channels, tapsPerChannel, windowType,logResults);
}

20
src/main/java/io/github/dsheirer/dsp/filter/channelizer/ChannelizerViewer.java
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@@ -91,7 +91,7 @@ public class ChannelizerViewer extends JFrame
private void init()
{
setTitle("Polyphase Channelizer Viewer");
setSize(1000, 800);
setSize(1200, 800);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(new MigLayout("insets 0 0 0 0", "[grow,fill]", "[grow,fill]"));
setLocationRelativeTo(null);
@@ -119,7 +119,7 @@ public class ChannelizerViewer extends JFrame
{
mPrimarySpectrumPanel = new PrimarySpectrumPanel(mSettingsManager,
mTestTuner.getTunerController().getSampleRate());
mPrimarySpectrumPanel.setPreferredSize(new Dimension(1000, 200));
mPrimarySpectrumPanel.setPreferredSize(new Dimension(1200, 200));
mPrimarySpectrumPanel.setDFTSize(mMainPanelDFTSize);
mTestTuner.getTunerController().addComplexBufferListener(mPrimarySpectrumPanel);
}
@@ -135,8 +135,8 @@ public class ChannelizerViewer extends JFrame
mControlPanel.setLayout(new MigLayout("insets 0 0 0 0", "", ""));
mControlPanel.add(new JLabel("Tone:"), "align left");
long minimumFrequency = -(long)mTestTuner.getTunerController().getSampleRate() / 2;
long maximumFrequency = (long)mTestTuner.getTunerController().getSampleRate() / 2;
long minimumFrequency = -(long)mTestTuner.getTunerController().getSampleRate() / 2 + 1;
long maximumFrequency = (long)mTestTuner.getTunerController().getSampleRate() / 2 - 1;
long toneFrequency = 0;
SpinnerNumberModel model = new SpinnerNumberModel(toneFrequency, minimumFrequency, maximumFrequency,
@@ -310,7 +310,7 @@ public class ChannelizerViewer extends JFrame
{
setLayout(new MigLayout("insets 0 0 0 0", "[grow,fill]", "[grow,fill]"));
mSpectrumPanel = new SpectrumPanel(settingsManager);
mSpectrumPanel.setSampleSize(26);
mSpectrumPanel.setSampleSize(16);
add(mSpectrumPanel);
mDFTProcessor.addConverter(mComplexDecibelConverter);
@@ -349,7 +349,7 @@ public class ChannelizerViewer extends JFrame
{
setLayout(new MigLayout("insets 0 0 0 0", "[center,grow,fill][]", "[grow,fill][]"));
mSpectrumPanel = new SpectrumPanel(settingsManager);
mSpectrumPanel.setSampleSize(22);
mSpectrumPanel.setSampleSize(16);
add(mSpectrumPanel, "span");
add(new JLabel("Center:" + frequency));
@@ -362,7 +362,7 @@ public class ChannelizerViewer extends JFrame
mLoggingEnabled = mLoggingButton.isSelected();
}
});
add(mLoggingButton);
// add(mLoggingButton);
mDFTProcessor.addConverter(mComplexDecibelConverter);
mDFTProcessor.process(SourceEvent.sampleRateChange(sampleRate));
@@ -433,7 +433,7 @@ public class ChannelizerViewer extends JFrame
mSource = source;
setLayout(new MigLayout("insets 0 0 0 0", "[center,grow,fill][]", "[grow,fill][]"));
mSpectrumPanel = new SpectrumPanel(settingsManager);
mSpectrumPanel.setSampleSize(28);
mSpectrumPanel.setSampleSize(16);
add(mSpectrumPanel, "span");
add(new JLabel("Index:" + index));
@@ -446,7 +446,7 @@ public class ChannelizerViewer extends JFrame
mLoggingEnabled = mLoggingButton.isSelected();
}
});
add(mLoggingButton);
// add(mLoggingButton);
mDFTProcessor.addConverter(mComplexDecibelConverter);
mDFTProcessor.process(SourceEvent.sampleRateChange(25000.0));
@@ -507,7 +507,7 @@ public class ChannelizerViewer extends JFrame
if(useGUI)
{
int channelsPerRow = 8;
int channelsPerRow = 16;
final ChannelizerViewer frame = new ChannelizerViewer(channelsPerRow);

2
src/main/java/io/github/dsheirer/dsp/filter/channelizer/PolyphaseChannelManager.java
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@@ -49,7 +49,7 @@ public class PolyphaseChannelManager implements ISourceEventProcessor
private final static Logger mLog = LoggerFactory.getLogger(PolyphaseChannelManager.class);
private static final double MINIMUM_CHANNEL_BANDWIDTH = 12500.0;
private static final double CHANNEL_OVERSAMPLING = 2.0;
private static final int POLYPHASE_FILTER_TAPS_PER_CHANNEL = 19;
private static final int POLYPHASE_FILTER_TAPS_PER_CHANNEL = 17;
private Broadcaster<SourceEvent> mSourceEventBroadcaster = new Broadcaster<>();
private IComplexBufferProvider mComplexBufferProvider;

12
src/main/java/io/github/dsheirer/dsp/filter/channelizer/output/TwoChannelOutputProcessor.java
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@@ -15,10 +15,8 @@
******************************************************************************/
package io.github.dsheirer.dsp.filter.channelizer.output;
import io.github.dsheirer.dsp.filter.Filters;
import io.github.dsheirer.dsp.filter.channelizer.PolyphaseChannelResultsBuffer;
import io.github.dsheirer.dsp.filter.channelizer.TwoChannelSynthesizerM2;
import io.github.dsheirer.dsp.filter.fir.complex.ComplexFIRFilter;
import io.github.dsheirer.dsp.mixer.FS4DownConverter;
import io.github.dsheirer.sample.complex.TimestampedBufferAssembler;
import org.slf4j.Logger;
@@ -28,8 +26,6 @@ import java.util.List;
public class TwoChannelOutputProcessor extends ChannelOutputProcessor
{
private ComplexFIRFilter mLowPassFilter =
new ComplexFIRFilter(Filters.HALF_BAND_FILTER_47T.getCoefficients(), 1.0f);
private TwoChannelSynthesizerM2 mSynthesizer;
private FS4DownConverter mFS4DownConverter = new FS4DownConverter();
@@ -113,13 +109,9 @@ public class TwoChannelOutputProcessor extends ChannelOutputProcessor
//The synthesized channels are centered at +FS/4 ... downconvert to center the spectrum
mFS4DownConverter.mixComplex(synthesized);
//Apply frequency correction to center the signal of interest within the synthesized channel
// getFrequencyCorrectionMixer().mixComplex(synthesized);
//Apply offset and frequency correction to center the signal of interest within the synthesized channel
getFrequencyCorrectionMixer().mixComplex(synthesized);
//Apply low-pass filtering to attenuate neighboring channel(s)
// synthesized = mLowPassFilter.filter(synthesized);
//Send it on its merry way ...
timestampedBufferAssembler.receive(synthesized);
}
}

23
src/main/java/io/github/dsheirer/dsp/mixer/LowPhaseNoiseOscillator.java
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@@ -31,7 +31,6 @@ public class LowPhaseNoiseOscillator extends AbstractOscillator
private double mCosineAngle;
private double mSineAngle;
private double mGain = 1.0;
private boolean mReset;
/**
* Ultra-low phase noise complex oscillator as described in Digital Signal Processing 3e, Lyons, p.786
@@ -46,19 +45,6 @@ public class LowPhaseNoiseOscillator extends AbstractOscillator
update();
}
/**
* Sets the frequency of the tone generated by this oscillator.
*/
@Override
public void setFrequency(double frequency)
{
//This oscillator does not recover when the current frequency is equal to exactly half the sample rate, so we
//have to set a flag to reset the I/Q structures when changing the frequency from exactly half the sample rate.
mReset = getFrequency() < 0.01 || Math.abs(getFrequency()) - (getSampleRate() / 2) < 1.0;
super.setFrequency(frequency);
}
@Override
public float quadrature()
{
@@ -80,15 +66,6 @@ public class LowPhaseNoiseOscillator extends AbstractOscillator
mCosineAngle = Math.cos(anglePerSample);
mSineAngle = Math.sin(anglePerSample);
if(mReset)
{
mInphase = 1.0;
mQuadrature = 0.0;
mPreviousInphase = 1.0;
mPreviousQuadrature = 0.0;
mReset = false;
}
}
/**

2
src/main/java/io/github/dsheirer/source/tuner/test/TestTunerController.java
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@@ -32,7 +32,7 @@ public class TestTunerController extends TunerController
public static final long MINIMUM_FREQUENCY = 1l;
public static final long MAXIMUM_FREQUENCY = 1000000000l;
public static final int SAMPLE_RATE = 50000;
public static final int SAMPLE_RATE = 800000;
public static final int DC_NOISE_BANDWIDTH = 0;
public static final double USABLE_BANDWIDTH = 1.00;