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Interferometer (7)

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f4exb
2019-09-28 20:25:34 +02:00
parent 208b9f4ebf
commit 5fa8a62596
5 changed files with 55 additions and 63 deletions
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plugins/channelmimo/interferometer/interferometercorr.cpp
+18 -2
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@@ -26,8 +26,24 @@ Sample sAdd(const Sample& a, const Sample& b) { //!< Sample addition
Sample sMulConj(const Sample& a, const Sample& b) { //!< Sample multiply with conjugate
Sample s;
s.setReal((a.real()*b.real() + a.imag()*b.imag()) / (1<<(SDR_RX_SAMP_SZ - 16 + 1)));
s.setImag((a.imag()*b.real() - a.real()*b.imag()) / (1<<(SDR_RX_SAMP_SZ - 16 + 1)));
// Integer processing
int64_t ax = a.real();
int64_t ay = a.imag();
int64_t bx = b.real();
int64_t by = b.imag();
int64_t x = ax*bx + ay*by;
int64_t y = ay*bx - ax*by;
s.setReal(x>>SDR_RX_SAMP_SZ);
s.setImag(y>>SDR_RX_SAMP_SZ);
// Floating point processing (in practice there is no significant performance difference)
// float ax = a.real() / SDR_RX_SCALEF;
// float ay = a.imag() / SDR_RX_SCALEF;
// float bx = b.real() / SDR_RX_SCALEF;
// float by = b.imag() / SDR_RX_SCALEF;
// float x = ax*bx + ay*by;
// float y = ay*bx - ax*by;
// s.setReal(x*SDR_RX_SCALEF);
// s.setImag(y*SDR_RX_SCALEF);
return s;
}