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UDP source plugin: optimize squelch gate and release times for SSB

This commit is contained in:
f4exb 2017-08-20 23:44:40 +02:00
parent 872fa9bd20
commit f56bea2afe
3 changed files with 38 additions and 13 deletions
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34
plugins/channelrx/udpsrc/udpsrc.cpp
View File

@ -37,7 +37,8 @@ UDPSrc::UDPSrc(MessageQueue* uiMessageQueue, UDPSrcGUI* udpSrcGUI, BasebandSampl
m_squelchOpen(false),
m_squelchOpenCount(0),
m_squelchCloseCount(0),
m_squelchThreshold(4800),
m_squelchGate(4800),
m_squelchRelease(4800),
m_agc(9600, m_agcTarget, 1e-6),
m_settingsMutex(QMutex::Recursive)
{
@ -448,11 +449,23 @@ void UDPSrc::apply(bool force)
m_interpolator.create(16, m_config.m_inputSampleRate, m_config.m_rfBandwidth / 2.0);
m_sampleDistanceRemain = m_config.m_inputSampleRate / m_config.m_outputSampleRate;
m_squelchThreshold = m_config.m_outputSampleRate * m_config.m_squelchGate;
if ((m_config.m_sampleFormat == FormatLSB) ||
(m_config.m_sampleFormat == FormatLSBMono) ||
(m_config.m_sampleFormat == FormatUSB) ||
(m_config.m_sampleFormat == FormatUSBMono))
{
m_squelchGate = m_config.m_outputSampleRate * 0.05;
}
else
{
m_squelchGate = m_config.m_outputSampleRate * m_config.m_squelchGate;
}
m_squelchRelease = m_config.m_outputSampleRate * m_config.m_squelchGate;
initSquelch(m_squelchOpen);
m_agc.resize(m_config.m_outputSampleRate * 0.2, m_agcTarget); // Fixed 200 ms
m_agc.setStepDownDelay( m_config.m_outputSampleRate * (m_config.m_squelchGate == 0 ? 0.01 : m_config.m_squelchGate));
m_agc.setGate(m_config.m_outputSampleRate * 0.02);
m_agc.setGate(m_config.m_outputSampleRate * 0.05);
m_bandpass.create(301, m_config.m_outputSampleRate, 300.0, m_config.m_rfBandwidth / 2.0f);
@ -476,10 +489,21 @@ void UDPSrc::apply(bool force)
if ((m_config.m_squelchGate != m_running.m_squelchGate) || force)
{
m_squelchThreshold = m_config.m_outputSampleRate * m_config.m_squelchGate;
if ((m_config.m_sampleFormat == FormatLSB) ||
(m_config.m_sampleFormat == FormatLSBMono) ||
(m_config.m_sampleFormat == FormatUSB) ||
(m_config.m_sampleFormat == FormatUSBMono))
{
m_squelchGate = m_config.m_outputSampleRate * 0.05;
}
else
{
m_squelchGate = m_config.m_outputSampleRate * m_config.m_squelchGate;
}
m_squelchRelease = m_config.m_outputSampleRate * m_config.m_squelchGate;
initSquelch(m_squelchOpen);
m_agc.setStepDownDelay(m_config.m_outputSampleRate * (m_config.m_squelchGate == 0 ? 0.01 : m_config.m_squelchGate)); // same delay for up and down
m_agc.setGate(m_config.m_outputSampleRate * 0.02);
}
if ((m_config.m_squelch != m_running.m_squelch) || force)

15
plugins/channelrx/udpsrc/udpsrc.h
View File

@ -340,7 +340,8 @@ protected:
bool m_squelchOpen;
int m_squelchOpenCount;
int m_squelchCloseCount;
int m_squelchThreshold; //!< number of samples computed from given gate
int m_squelchGate; //!< number of samples computed from given gate
int m_squelchRelease;
MagAGC m_agc;
Bandpass<double> m_bandpass;
@ -353,26 +354,26 @@ protected:
{
if ((!m_running.m_squelchEnabled) || (value > m_running.m_squelch))
{
if (m_squelchThreshold == 0)
if (m_squelchGate == 0)
{
m_squelchOpen = true;
}
else
{
if (m_squelchOpenCount < m_squelchThreshold)
if (m_squelchOpenCount < m_squelchGate)
{
m_squelchOpenCount++;
}
else
{
m_squelchCloseCount = m_squelchThreshold;
m_squelchCloseCount = m_squelchRelease;
m_squelchOpen = true;
}
}
}
else
{
if (m_squelchThreshold == 0)
if (m_squelchGate == 0)
{
m_squelchOpen = false;
}
@ -396,8 +397,8 @@ protected:
if (open)
{
m_squelchOpen = true;
m_squelchOpenCount = m_squelchThreshold;
m_squelchCloseCount = m_squelchThreshold;
m_squelchOpenCount = m_squelchGate;
m_squelchCloseCount = m_squelchRelease;
}
else
{

2
plugins/channelrx/udpsrc/udpsrcgui.ui
View File

@ -641,7 +641,7 @@
<string>Squelch gate (ms)</string>
</property>
<property name="maximum">
<number>50</number>
<number>90</number>
</property>
<property name="pageStep">
<number>1</number>