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Merge branch 'f4exb:master' into freq_scanner

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srcejon 2023-11-30 14:09:47 +00:00 committed by GitHub
commit 6aeb914f22
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7 changed files with 44 additions and 5 deletions
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26
plugins/channelrx/demodssb/ssbdemodsink.cpp
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@ -69,10 +69,12 @@ SSBDemodSink::SSBDemodSink() :
m_demodBufferFill = 0;
m_usb = true;
m_magsq = 0.0f;
m_magsqSum = 0.0f;
m_magsqPeak = 0.0f;
m_magsq = 0.0;
m_magsqSum = 0.0;
m_magsqPeak = 0.0;
m_magsqCount = 0;
m_magsqCur = 0.0;
m_magsqPrev = 0.0;
m_agc.setClampMax(SDR_RX_SCALED/100.0);
m_agc.setClamping(m_agcClamping);
@ -170,10 +172,24 @@ void SSBDemodSink::processOneSample(Complex &ci)
m_sum.imag(0.0);
}
float agcVal = m_agcActive ? m_agc.feedAndGetValue(sideband[i]) : 0.1;
float agcVal = m_agcActive ? m_agc.feedAndGetValue(sideband[i]) : 1.0;
fftfilt::cmplx& delayedSample = m_squelchDelayLine.readBack(m_agc.getStepDownDelay());
m_audioActive = delayedSample.real() != 0.0;
m_squelchDelayLine.write(sideband[i]*agcVal);
m_magsqCur = std::norm(sideband[i]*agcVal);
// Prevent overload if squared magnitude variation is 90% full scale (0.9*.0.9 = 0.81)
// Only if AGC is active
if (m_agcActive && (m_magsqCur - m_magsqPrev > m_agcTarget*m_agcTarget*8.1))
{
m_agc.reset(m_agcTarget*100.0); // Quench AGC at -20dB the target
m_squelchDelayLine.write(sideband[i]);
}
else
{
m_squelchDelayLine.write(sideband[i]*agcVal);
}
m_magsqPrev = m_magsqCur;
if (m_audioMute)
{

2
plugins/channelrx/demodssb/ssbdemodsink.h
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@ -101,6 +101,8 @@ private:
double m_magsqSum;
double m_magsqPeak;
int m_magsqCount;
double m_magsqCur;
double m_magsqPrev;
MagSqLevelsStore m_magSqLevelStore;
MagAGC m_agc;
bool m_agcActive;

1
sdrbase/dsp/agc.h
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@ -32,6 +32,7 @@ public:
void setOrder(double R) { m_R = R; }
Real getValue();
Real getAverage();
void reset(double R) { m_moving_average.fill(R); }
virtual void feed(Complex& ci) = 0;
protected:

16
sdrbase/dsp/projector.cpp
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@ -60,6 +60,15 @@ Real Projector::run(const Sample& s)
v = re*re + im*im;
}
break;
case ProjectionDMagSq:
{
Real re = s.m_real / SDR_RX_SCALEF;
Real im = s.m_imag / SDR_RX_SCALEF;
Real curMagSq = re*re + im*im;
v = curMagSq - m_prevVal;
m_prevVal = curMagSq;
}
break;
case ProjectionMagDB:
{
Real re = s.m_real / SDR_RX_SCALEF;
@ -235,6 +244,13 @@ Real Projector::run(const std::complex<float>& s)
case ProjectionMagSq:
v = std::norm(s);
break;
case ProjectionDMagSq:
{
Real curMagSq = std::norm(s);
v = curMagSq - m_prevVal;
m_prevVal = curMagSq;
}
break;
case ProjectionMagDB:
{
Real magsq = std::norm(s);

2
sdrbase/dsp/projector.h
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@ -33,6 +33,7 @@ public:
ProjectionImag, //!< Extract imaginary part
ProjectionMagLin, //!< Calculate linear magnitude or modulus
ProjectionMagSq, //!< Calculate linear squared magnitude or power
ProjectionDMagSq, //!< Calculate time derivative of linear squared magnitude or power
ProjectionMagDB, //!< Calculate logarithmic (dB) of squared magnitude
ProjectionPhase, //!< Calculate phase
ProjectionDOAP, //!< Calculate ambiguous DOA from phase as phase difference (assuming positive)
@ -60,6 +61,7 @@ private:
static Real normalizeAngle(Real angle);
ProjectionType m_projectionType;
Real m_prevArg;
Real m_prevVal;
Real *m_cache;
bool m_cacheMaster;
};

1
sdrgui/gui/glscope.cpp
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@ -1893,6 +1893,7 @@ void GLScope::setYScale(ScaleEngine &scale, uint32_t highlightedTraceIndex)
break;
case Projector::ProjectionMagLin:
case Projector::ProjectionMagSq:
case Projector::ProjectionDMagSq:
if (amp_range < 1e-9) {
scale.setRange(Unit::None, amp_ofs * 1e12, amp_range * 1e12 + amp_ofs * 1e12);
} else if (amp_range < 1e-6) {

1
sdrgui/gui/glscopegui.cpp
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@ -1315,6 +1315,7 @@ void GLScopeGUI::fillProjectionCombo(QComboBox* comboBox)
comboBox->addItem("Imag", Projector::ProjectionImag);
comboBox->addItem("Mag", Projector::ProjectionMagLin);
comboBox->addItem("MagSq", Projector::ProjectionMagSq);
comboBox->addItem("dMagSq", Projector::ProjectionDMagSq);
comboBox->addItem("MagdB", Projector::ProjectionMagDB);
comboBox->addItem("Phi", Projector::ProjectionPhase);
comboBox->addItem("DOAP", Projector::ProjectionDOAP);