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[WIP] The Two-Channel synthesizer is now fully-functional and the

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channelizer sub-system is functionally complete.

Updated the channelizer and synthesizer filter design methods to use a
Kaiser windowed Nyquist filter.  Updated the synthesizer filter design
to use a new cutoff frequency of 105% of the channel bandwidth to
resolve a slight dip in the synthesized channel gain at the channel
union region.

Updated the 2 channel output processor to use a low-pass filter that
is designed for the runtime channel sample rate versus hard-coded 12.5
khz.

Testing and redesign continues ...
This commit is contained in:
Denny
2018-05-20 07:21:14 -04:00
parent 341e740e77
commit c13315f731
21 changed files with 698 additions and 459 deletions
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2
src/main/java/io/github/dsheirer/spectrum/DFTProcessor.java
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@@ -44,7 +44,7 @@ import java.util.concurrent.atomic.AtomicBoolean;
public class DFTProcessor implements Listener<ReusableComplexBuffer>, ISourceEventProcessor, IDFTWidthChangeProcessor
{
private static final Logger mLog = LoggerFactory.getLogger(DFTProcessor.class);
private static final int BUFFER_QUEUE_MAX_SIZE = 12;
private static final int BUFFER_QUEUE_MAX_SIZE = 20;
private static final int BUFFER_QUEUE_OVERFLOW_RESET_THRESHOLD = 6;
private static final String FRAME_RATE_PROPERTY = "spectral.display.frame.rate";