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New PLL: phase lock status draft

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This commit is contained in:
f4exb
2018-05-15 19:40:53 +02:00
parent 457b9aa2c8
commit bb2d530122
3 changed files with 57 additions and 14 deletions
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sdrbase/dsp/phaselockcomplex.cpp
+45 -8
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@@ -34,12 +34,18 @@ PhaseLockComplex::PhaseLockComplex() :
m_v1(0.0),
m_v2(0.0),
m_deltaPhi(0.0),
m_phiHatLast(0.0),
m_phiHat(0.0),
m_phiHatPrev(0.0),
m_phiHat1(0.0),
m_phiHat2(0.0),
m_dPhiHatAccum(0.0),
m_phiHatCount(0),
m_y(1.0, 0.0),
m_yRe(1.0),
m_yIm(0.0),
m_freq(0.0),
m_lock(0.0),
m_lockCount(0),
m_pskOrder(1)
{
}
@@ -86,13 +92,19 @@ void PhaseLockComplex::reset()
m_v1 = 0.0f;
m_v2 = 0.0f;
m_deltaPhi = 0.0f;
m_phiHatLast = 0.0f;
m_phiHat = 0.0f;
m_phiHatPrev = 0.0f;
m_phiHat1 = 0.0f;
m_phiHat2 = 0.0f;
m_dPhiHatAccum = 0.0f;
m_phiHatCount = 0;
m_y.real(1.0);
m_y.real(0.0);
m_yRe = 1.0f;
m_yIm = 0.0f;
m_freq = 0.0f;
m_lock = 0.0f;
m_lockCount = 0;
}
void PhaseLockComplex::feed(float re, float im)
@@ -136,15 +148,40 @@ void PhaseLockComplex::feed(float re, float im)
m_phiHat += 2.0*M_PI;
}
m_freq = (m_phiHat - m_phiHatLast) / (2.0*M_PI);
float dPhi = normalizeAngle(m_phiHat - m_phiHatPrev);
m_phiHatPrev = m_phiHat;
if (m_freq < -1.0f) {
m_freq += 2.0f;
} else if (m_freq > 1.0f) {
m_freq -= 2.0f;
if (m_phiHatCount < 9)
{
m_dPhiHatAccum += dPhi;
}
else
{
float dPhi1 = (m_phiHat1 - m_dPhiHatAccum) / 10.0f;
float dPhi1Prev = (m_phiHat2 - m_phiHat1) / 10.0f;
m_lock = dPhi1 - dPhi1Prev; // second derivative of phase
if ((m_lock > -0.01) && (m_lock < 0.01))
{
if (m_lockCount < 1000) {
m_lockCount++;
}
}
else
{
if (m_lockCount > 0) {
m_lockCount--;
}
}
m_freq = dPhi1 / 2.0*M_PI; // first derivative of phase
m_phiHat2 = m_phiHat1;
m_phiHat1 = m_dPhiHatAccum;
m_dPhiHatAccum = 0.0f;
m_phiHatCount = 0;
}
m_phiHatLast = m_phiHat;
m_dPhiHatAccum += dPhi;
}
float PhaseLockComplex::normalizeAngle(float angle)