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NFM demod: optimized feed routine. Fixed channel power calculation

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f4exb 2015-10-11 06:34:12 +02:00
parent 23f773c111
commit e9f122fac1
3 changed files with 7 additions and 6 deletions
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9
plugins/channel/nfm/nfmdemod.cpp
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@ -122,7 +122,8 @@ void NFMDemod::feed(const SampleVector::const_iterator& begin, const SampleVecto
for (SampleVector::const_iterator it = begin; it != end; ++it) for (SampleVector::const_iterator it = begin; it != end; ++it)
{ {
Complex c(it->real() / 32768.0f, it->imag() / 32768.0f); //Complex c(it->real() / 32768.0f, it->imag() / 32768.0f);
Complex c(it->real(), it->imag());
c *= m_nco.nextIQ(); c *= m_nco.nextIQ();
{ {
@ -135,7 +136,7 @@ void NFMDemod::feed(const SampleVector::const_iterator& begin, const SampleVecto
//ci *= (m_agcLevel / m_AGC.getValue()); //ci *= (m_agcLevel / m_AGC.getValue());
m_AGC.feed(ci); m_AGC.feed(ci);
m_magsq = m_AGC.getMagSq(); //m_magsq = m_AGC.getMagSq() / (1<<30);
// demod // demod
/* /*
@ -172,7 +173,7 @@ void NFMDemod::feed(const SampleVector::const_iterator& begin, const SampleVecto
// AF processing // AF processing
squelchOpen = (getMagSq() > m_squelchLevel); squelchOpen = (getMag() > m_squelchLevel);
/* /*
if (m_afSquelch.analyze(demod)) if (m_afSquelch.analyze(demod))
@ -355,7 +356,7 @@ void NFMDemod::apply()
if (m_config.m_squelch != m_running.m_squelch) if (m_config.m_squelch != m_running.m_squelch)
{ {
// input is a value in tenths of dB // input is a value in tenths of dB
m_squelchLevel = pow(10.0, m_config.m_squelch / 100.0); m_squelchLevel = pow(10.0, m_config.m_squelch / 200.0);
//m_squelchLevel *= m_squelchLevel; //m_squelchLevel *= m_squelchLevel;
m_afSquelch.setThreshold(m_squelchLevel); m_afSquelch.setThreshold(m_squelchLevel);
} }

2
plugins/channel/nfm/nfmdemod.h
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@ -64,7 +64,7 @@ public:
m_ctcssIndexSelected = selectedCtcssIndex; m_ctcssIndexSelected = selectedCtcssIndex;
} }
Real getMagSq() { return m_AGC.getAverage() / 4534.0; } Real getMag() { return m_AGC.getAverage() / (1<<15); }
private: private:
class MsgConfigureNFMDemod : public Message { class MsgConfigureNFMDemod : public Message {

2
plugins/channel/nfm/nfmdemodgui.cpp
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@ -341,7 +341,7 @@ void NFMDemodGUI::blockApplySettings(bool block)
void NFMDemodGUI::tick() void NFMDemodGUI::tick()
{ {
Real powDb = CalcDb::dbPower(m_nfmDemod->getMagSq()); Real powDb = CalcDb::dbPower(m_nfmDemod->getMag()) * 2;
m_channelPowerDbAvg.feed(powDb); m_channelPowerDbAvg.feed(powDb);
ui->channelPower->setText(QString::number(m_channelPowerDbAvg.average(), 'f', 1)); ui->channelPower->setText(QString::number(m_channelPowerDbAvg.average(), 'f', 1));
} }