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- improved trackers and AGC

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git-svn-id: http://moon:8086/svn/software/trunk/projects/mpsk_rx_gui@1033 b431acfa-c32f-4a4a-93f1-934dc6c82436
This commit is contained in:
jens
2022-06-17 16:52:07 +00:00
parent 9e00a55ec4
commit b4a96dfd2b
1 changed files with 19 additions and 22 deletions
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Source/Receiver.cpp
+19 -22
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@@ -509,15 +509,24 @@ void Receiver::processBaseband(CVec const &iq, uint32_t len)
if (ClockIsTick(&m_symClock, 1))
{
#ifndef DISABLE_UNUSED_STATISTICS
minMaxProcess(&m_statistics.ddcMinMax, IQ_eq_in);
#endif
minMaxProcess(&m_statistics.ddcMinMax, IQ_eq_in);
// -----------------------------------------------------
// AGC Blind process samples
// @1 x symbolrate
// -----------------------------------------------------
if (m_params.agc_mode != agc_mode_disabled)
{
AGC_Process(&agcBlind, CpxMagS(IQ_eq_in), m_params.agcMu[m_params.agcMu_index], m_pSymMapper->R2_cma);
if (m_params.agcMu_index == agc_state_acquisition)
{
e_agc = 1.0 - CpxMagS(m_trackers[0]);
AGC_Train(&agcBlind, e_agc, m_params.agcMu[m_params.agcMu_index]);
}
if (m_params.agcMu_index == agc_state_track)
{
e_agc = 1.0 - CpxMagS(m_trackers[0]);
AGC_Train(&agcBlind, e_agc, m_params.agcMu[m_params.agcMu_index]);
}
}
// -----------------------------------------------------
@@ -620,27 +629,15 @@ void Receiver::processBaseband(CVec const &iq, uint32_t len)
// Lock-detector development
// @1 x symbolrate
// -----------------------------------------------------
cpx_t winner_diff = Cpx(0,0);
radio_float_t winner_d = 1000;
int winner_i = 0;
for (int i=0; i < 4; i++)
{
cpx_t diff = CpxSubS(IQ_soft, m_trackers_[i]);
radio_float_t distance = CpxMagS(diff);
radio_float_t alpha = 0.002;
radio_float_t beta = 1.0 - alpha;
cpx_t s_min = m_statistics.ddcMinMax.min;
cpx_t s_max = m_statistics.ddcMinMax.max;
m_trackers[0] = CpxAddS(CpxScaleRealS(m_trackers[0], beta), CpxScaleRealS(Cpx(s_max.real, s_min.imag), alpha));
m_trackers[1] = CpxAddS(CpxScaleRealS(m_trackers[1], beta), CpxScaleRealS(Cpx(s_max.real, s_max.imag), alpha));
m_trackers[2] = CpxAddS(CpxScaleRealS(m_trackers[2], beta), CpxScaleRealS(Cpx(s_min.real, s_max.imag), alpha));
m_trackers[3] = CpxAddS(CpxScaleRealS(m_trackers[3], beta), CpxScaleRealS(Cpx(s_min.real, s_min.imag), alpha));
// Find tracker with smallest distance from current symbol
if (distance < winner_d)
{
winner_d = distance;
winner_i = i;
winner_diff = diff;
}
}
m_trackers_[winner_i] = CpxAddS(m_trackers_[winner_i], CpxScaleRealS(winner_diff, winner_d*TRACKER_MU+TRACKER_EPS));
for (int i=0; i < 4; i++)
{
m_trackers[i] = CpxAddS(CpxScaleRealS(m_trackers[i], 0.998f), CpxScaleRealS(m_trackers_[i], 0.002f));
}
// Statistics
#ifndef DISABLE_UNUSED_STATISTICS