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psk pskr squelch 

* changed squelch to fast attack / slow decay processing
pull/1/head
David Freese 2014-10-29 07:55:54 -05:00
rodzic 55ff390950
commit 91674b8ad7
1 zmienionych plików z 30 dodań i 7 usunięć
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37
src/psk/psk.cxx
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@ -1124,9 +1124,28 @@ static double averageamp;
}
// simple low pass filter for quality of signal
// ***********************************************************
// **** dhf - added fast attack, slow decay algorithm
// **** JD & JP - please test with your R and 8psk modem types
// ****
// ***********************************************************
double decay = SQLDECAY;
double attack = SQLDECAY;
if (_8psk) {
attack *= 2;
decay *= 4;
}
if (_pskr) {
attack *= 2;
decay *= 10;
}
double cval = cos(n*phase);
double sval = sin(n*phase);
quality = cmplx(
decayavg(quality.real(), cos(n*phase), _pskr ? SQLDECAY * 10 : SQLDECAY),
decayavg(quality.imag(), sin(n*phase), _pskr ? SQLDECAY * 10 : SQLDECAY));
decayavg(quality.real(), cval, cval > quality.real() ? attack : decay),
decayavg(quality.imag(), sval, sval > quality.real() ? attack : decay));
metric = 100.0 * norm(quality);
if (progdefaults.Pskmails2nreport && (mailserver || mailclient)) {
@ -1140,11 +1159,15 @@ static double averageamp;
// FEC: adjust squelch for extra sensitivity.
// Otherwise we miss good characters
if (_pskr) {
metric = metric * 4;
} else if ( (_xpsk || _8psk || _16psk) && !_disablefec) {
metric *= 2 * symbits; /// @TODO scale the metric with the psk constellation density
}
// ***********************************************************
// **** DHF still needed with attack/decay filtering?
// ***********************************************************
// if (_pskr) {
// metric = metric * 4;
// }
// else if ( (_xpsk || _8psk || _16psk) && !_disablefec) {
// metric *= 2 * symbits; /// @TODO scale the metric with the psk constellation density
// }
if (metric > 100)
metric = 100;