VE7UWU/sdrangel
1
0
Fork 0
mirror of https://github.com/f4exb/sdrangel.git synced 2025-02-03 09:44:01 -05:00
Code Issues Projects Releases Wiki Activity

AM demod: refactor demodulation

Browse Source
This commit is contained in:
f4exb 2017-05-12 04:25:14 +02:00
parent 225f25b9f4
commit 51d24102ed
2 changed files with 7 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
plugins/channelrx/demodam/amdemod.cpp
View File

@ -35,7 +35,7 @@ AMDemod::AMDemod() :
m_magsqPeak(0.0f),
m_magsqCount(0),
m_movingAverage(40, 0),
m_volumeAGC(40, 0)
m_volumeAGC(4800, 1.0)
{
setObjectName("AMDemod");

16
plugins/channelrx/demodam/amdemod.h
View File

@ -177,21 +177,17 @@ private:
{
Real demod = sqrt(magsq);
if (demod < -1)
{
demod = -1;
}
else if (demod > 1)
if (demod > 1)
{
demod = 1;
}
m_volumeAGC.feed(demod);
Real attack = (m_squelchCount - (m_running.m_audioSampleRate / 20)) / (Real) (m_running.m_audioSampleRate / 20);
demod *= ((0.003 * attack) / m_volumeAGC.getValue());
demod *= m_running.m_volume;
sample = demod * 32700 * 16;
demod /= m_volumeAGC.getValue();
sample = (0.5 - demod) * 2048 * m_running.m_volume;
// Real attack = (m_squelchCount - (m_running.m_audioSampleRate / 20)) / (Real) (m_running.m_audioSampleRate / 20);
// demod *= ((0.003 * attack) / m_volumeAGC.getValue());
// sample = demod * 32700 * 16;
m_squelchOpen = true;
}
else