#39 WIP polyphase channelizers.

src/dsp/filter/FilterFactory.java

@@ -567,7 +567,7 @@ public class FilterFactory
      * For 40db attenuation, calculate the number of symbols based on the following formula:
      *    Symbols = -44 * alpha + 33
      *
-     * Polyphase TunerChannelizer notes:
+     * Polyphase Channelizer notes:
      * -Set samples Per Symbol at 2 (or more) * number of channels
      * -Set symbolCount to sufficient size to produce required attenuation
      * -Set symbol rate in hertz
@@ -725,7 +725,7 @@ public class FilterFactory
     }
 
     /**
-     * Creates a windowed-sync (Nyquist) M/2 prototype FIR filter for use with a Polyphase TunerChannelizer/Synthesizer.
+     * Creates a windowed-sync (Nyquist) M/2 prototype FIR filter for use with a Polyphase Channelizer/Synthesizer.
      * The filter is designed for x2 oversampling of each channel and the filter cutoff frequency is incrementally
      * adjusted to achieve a -6.02 dB attenuation at the channel band edge to enable perfect reconstruction of adjacent
      * channels.
@@ -833,14 +833,16 @@ public class FilterFactory
 
         if(logResults)
         {
-            mLog.debug("Polyphase TunerChannelizer Filter Design Summary");
+            mLog.debug("Polyphase Channelizer Filter Design Summary");
             mLog.debug("-----------------------------------------------------");
-            mLog.debug("Window Type: " + windowType.name());
+            mLog.debug("Input Sample Rate: " + sampleRate);
+            mLog.debug("Channel Bandwidth: " + channelBandwidth);
             mLog.debug("Channels: " + channels);
+            mLog.debug("Window Type: " + windowType.name());
             mLog.debug("Taps Per Channel: " + tapsPerChannel + " (Requested:" + tapsPerChannel + ")");
             mLog.debug("Filter Length: " + (taps.length + 1));
-            mLog.debug("Channel Bandwidth: " + channelBandwidth);
+            mLog.debug("Requested Cutoff Frequency:  " + (sampleRate * bandEdge));
-            mLog.debug("Cutoff Frequency: " + (sampleRate * cutoffFrequency));
+            mLog.debug("Actual Cutoff Frequency:  " + (sampleRate * cutoffFrequency));
             mLog.debug("Attenuation at 1.00 OBJECTIVE: " + PERFECT_RECONSTRUCTION_GAIN_AT_BAND_EDGE);
             mLog.debug("Attenuation at 1.00 Channels:  " + evaluate(taps, bandEdge * 1.00));
             mLog.debug("Attenuation at 1.25 Channels:  " + evaluate(taps, bandEdge * 1.25));

src/dsp/filter/channelizer/ChannelizerViewer.java

@@ -32,7 +32,6 @@ import source.tuner.TunerChannel;
 import source.tuner.configuration.TunerConfigurationModel;
 import source.tuner.test.TestTuner;
 import spectrum.DFTProcessor;
-import spectrum.DFTResultsListener;
 import spectrum.DFTSize;
 import spectrum.SpectrumPanel;
 import spectrum.converter.ComplexDecibelConverter;
@@ -168,12 +167,6 @@ public class ChannelizerViewer extends JFrame
         return mChannelPanel;
     }
 
-//    private float[] getFilter() throws FilterDesignException
-//    {
-//        return FilterFactory.getSincChannelizer(CHANNEL_BANDWIDTH, mChannelCount, mFilterTapsPerChannel,
-//            Window.WindowType.BLACKMAN_HARRIS_7, true);
-//    }
-
     public class ChannelArrayPanel extends JPanel
     {
         public ChannelArrayPanel()

src/source/tuner/test/SampleGenerator.java

@@ -57,6 +57,7 @@ public class SampleGenerator
             throw new IllegalArgumentException("Sweep update rate cannot be greater than sample rate");
         }
 
+        mLog.debug("Sample Generator - Sample Rate:" + sampleRate + " Frequency:" + frequency);
         mOscillator = new LowPhaseNoiseOscillator(sampleRate, frequency);
         mInterval = interval;
         mSweepUpdateInterval = sweepUpdateRate;
@@ -85,7 +86,7 @@ public class SampleGenerator
     {
         mSamplesPerInterval = (int)((double)mOscillator.getSampleRate() * ((double)mInterval / 1000.0));
 
-        mLog.debug("Sample Generator: " + mSamplesPerInterval + " samples every " + mInterval + " ms.");
+        mLog.debug("Sample Generator - " + mSamplesPerInterval + " samples every " + mInterval + "ms");
     }
 
     /**

src/source/tuner/test/TestTunerController.java

@@ -32,12 +32,15 @@ public class TestTunerController extends TunerController
 
     public static final long MINIMUM_FREQUENCY = 1000000l;     //1 MHz
     public static final long MAXIMUM_FREQUENCY = 10000000000l; //10 GHz
-    public static final long DEFAULT_FREQUENCY = 100000000;    //100 MHz
+    public static final long DEFAULT_CENTER_FREQUENCY = 100000000;    //100 MHz
     public static final int DEFAULT_SAMPLE_RATE = 50000;     //25 kHz
     public static final int DC_NOISE_BANDWIDTH = 5000;         // +/-5 kHz
     public static final double USABLE_BANDWIDTH = 0.90;  //90% usable bandwidth - 5% unusable on either end
+    public static final int SPECTRAL_FRAME_RATE = 20;
+    public static final long SAMPLE_GENERATION_INTERVAL = 1000 / SPECTRAL_FRAME_RATE;
 
     private SampleGenerator mSampleGenerator;
+    private long mReferenceFrequency = DEFAULT_CENTER_FREQUENCY;
 
     /**
      * Tuner controller testing implementation.
@@ -48,12 +51,12 @@ public class TestTunerController extends TunerController
 
         int sweepRate = 0;  //Hz per interval
 
-        mSampleGenerator = new SampleGenerator(DEFAULT_SAMPLE_RATE, DEFAULT_FREQUENCY, 100, sweepRate);
+        mSampleGenerator = new SampleGenerator(DEFAULT_SAMPLE_RATE, 5000, SAMPLE_GENERATION_INTERVAL, sweepRate);
 
         try
         {
             mLog.debug("Setting frequency ...");
-            mFrequencyController.setFrequency(DEFAULT_FREQUENCY);
+            mFrequencyController.setFrequency(DEFAULT_CENTER_FREQUENCY);
             mLog.debug("Setting sample rate of freq controller to: " + DEFAULT_SAMPLE_RATE);
             mFrequencyController.setSampleRate(DEFAULT_SAMPLE_RATE);
         }
@@ -94,7 +97,7 @@ public class TestTunerController extends TunerController
     @Override
     public long getTunedFrequency() throws SourceException
     {
-        return mSampleGenerator.getFrequency();
+        return mReferenceFrequency;
     }
 
     /**
@@ -105,7 +108,7 @@ public class TestTunerController extends TunerController
     @Override
     public void setTunedFrequency(long frequency) throws SourceException
     {
-        mSampleGenerator.setFrequency(frequency);
+        mReferenceFrequency = frequency;
     }
 
     /**
@@ -114,7 +117,8 @@ public class TestTunerController extends TunerController
      */
     public void setToneFrequency(long toneFrequency)
     {
-        mSampleGenerator.setFrequency(toneFrequency - getFrequency());
+        long frequency = toneFrequency - mReferenceFrequency;
+        mSampleGenerator.setFrequency(frequency);
     }
 
     /**
@@ -123,7 +127,7 @@ public class TestTunerController extends TunerController
      */
     public long getToneFrequency()
     {
-        return getFrequency() + mSampleGenerator.getFrequency();
+        return mReferenceFrequency + mSampleGenerator.getFrequency();
     }
 
     /**