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#2212 Introduce carrier offset measurement processor to monitor a 12.5 kHz channel and provide estimated carrier offset measurements that allow the tuner's frequency error monitor to correct for the average error reported from each channel. Uses a 15 dB threshold where the signal must be at least 15 dB above the noise floor before it will calculate and broadcast the estimate. Stores the updated PPM in the tuner configuration after each update to ensure the value persists across sessions. When selected in the tuner panel, updates the displayed PPM value after each PPM autocorrection. (#2218)

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Co-authored-by: Dennis Sheirer <dsheirer@github.com>
This commit is contained in:
Denny Sheirer
2025-04-20 06:55:43 -04:00
committed by GitHub
parent afadb227db
commit 2dcd994eb2
26 changed files with 816 additions and 275 deletions
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11
src/main/java/io/github/dsheirer/dsp/filter/channelizer/PolyphaseChannelManager.java
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@@ -1,6 +1,6 @@
/*
* *****************************************************************************
* Copyright (C) 2014-2024 Dennis Sheirer
* Copyright (C) 2014-2025 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -302,10 +302,17 @@ public class PolyphaseChannelManager implements ISourceEventProcessor
break;
case NOTIFICATION_FREQUENCY_AND_SAMPLE_RATE_LOCKED:
case NOTIFICATION_FREQUENCY_AND_SAMPLE_RATE_UNLOCKED:
case NOTIFICATION_FREQUENCY_CORRECTION_CHANGE:
case NOTIFICATION_RECORDING_FILE_LOADED:
//no-op
break;
case NOTIFICATION_FREQUENCY_CORRECTION_CHANGE:
//Re-broadcast this event to each channel so that the decoders can reset error tracking function(s).
List<TunerChannelSource> channels = new ArrayList<>(mChannelSources);
for(TunerChannelSource channel: channels)
{
channel.broadcastConsumerSourceEvent(sourceEvent);
}
break;
default:
mLog.info("Unrecognized source event: " + sourceEvent);
break;

4
src/main/java/io/github/dsheirer/dsp/psk/pll/FrequencyCorrectionSyncMonitor.java
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@@ -1,6 +1,6 @@
/*
* *****************************************************************************
* Copyright (C) 2014-2023 Dennis Sheirer
* Copyright (C) 2014-2025 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -98,7 +98,7 @@ public class FrequencyCorrectionSyncMonitor implements ISyncDetectListener, IFre
@Override
public void processFrequencyError(long frequencyError)
{
mFeedbackDecoder.broadcast(SourceEvent.pllFrequencyMeasurement(frequencyError));
mFeedbackDecoder.broadcast(SourceEvent.carrierOffsetMeasurement(-frequencyError));
//Only rebroadcast as a frequency error measurement if the sync count is more than 2
if(mSyncCount > 2)

4
src/main/java/io/github/dsheirer/dsp/squelch/PowerMonitor.java
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@@ -1,6 +1,6 @@
/*
* *****************************************************************************
* Copyright (C) 2014-2022 Dennis Sheirer
* Copyright (C) 2014-2025 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -98,7 +98,7 @@ public class PowerMonitor
/**
* Broadcasts the source event to an optional register listener
*/
private void broadcast(SourceEvent event)
public void broadcast(SourceEvent event)
{
if(mSourceEventListener != null)
{