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NFM Demod: revised squelch to take channel power short (16 samples) average

This commit is contained in:
f4exb 2016-12-12 23:15:41 +01:00
parent 25e2a9877b
commit e9faec07c5
2 changed files with 4 additions and 4 deletions
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6
plugins/channelrx/demodnfm/nfmdemod.cpp
View File

@ -68,7 +68,7 @@ NFMDemod::NFMDemod() :
m_agcLevel = 1.0;
m_AGC.resize(m_squelchGate, m_agcLevel);
// m_movingAverage.resize(16, 0);
m_movingAverage.resize(16, 0);
m_ctcssDetector.setCoefficients(3000, 6000.0); // 0.5s / 2 Hz resolution
m_afSquelch.setCoefficients(24, 600, 48000.0, 200, 0); // 4000 Hz span, 250us, 100ms attack
@ -154,7 +154,7 @@ void NFMDemod::feed(const SampleVector::const_iterator& begin, const SampleVecto
double magsqRaw = m_AGC.getMagSq();
Real magsq = magsqRaw / (1<<30);
// m_movingAverage.feed(magsq);
m_movingAverage.feed(magsq);
m_magsqSum += magsq;
if (magsq > m_magsqPeak)
@ -172,7 +172,7 @@ void NFMDemod::feed(const SampleVector::const_iterator& begin, const SampleVecto
// AF processing
if (magsq > m_squelchLevel)
if (m_movingAverage.average() > m_squelchLevel)
{
if (m_squelchCount < m_squelchGate)
{

2
plugins/channelrx/demodnfm/nfmdemod.h
View File

@ -207,7 +207,7 @@ private:
//Complex m_m1Sample;
//Complex m_m2Sample;
MagAGC m_AGC;
// MovingAverage<Real> m_movingAverage;
MovingAverage<Real> m_movingAverage;
AFSquelch m_afSquelch;
Real m_agcLevel; // AGC will aim to this level
Real m_agcFloor; // AGC will not go below this level