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Merge branch 'next' of git+ssh://github.com/carlesfernandez/gnss-sdr

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# Conflicts:
#	src/core/system_parameters/rtcm.cc
#	src/core/system_parameters/rtcm.h
#	src/tests/formats/rtcm_test.cc
This commit is contained in:
Carles Fernandez
2015-11-24 00:44:19 +01:00
parent e219954d1c c0f1d7241f
commit 0e8663a1fc
5 changed files with 57 additions and 14 deletions
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14
src/algorithms/tracking/libs/lock_detectors.cc
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@@ -73,16 +73,20 @@ float cn0_svn_estimator(gr_complex* Prompt_buffer, int length, long fs_in, doubl
float SNR_dB_Hz = 0;
float Psig = 0;
float Ptot = 0;
float Psig2, Ptot2, SNR_dB_Hz2; Psig2=0; Ptot2=0;
for (int i=0; i<length; i++)
{
Psig += std::abs(Prompt_buffer[i].real());
Psig += Prompt_buffer[i].real() * Prompt_buffer[i].real(); //std::abs(Prompt_buffer[i].real());
Psig2 += std::abs(Prompt_buffer[i].real());
Ptot += Prompt_buffer[i].imag() * Prompt_buffer[i].imag() + Prompt_buffer[i].real() * Prompt_buffer[i].real();
}
Psig = Psig / (float)length;
Psig = Psig * Psig;
Ptot = Ptot / (float)length;
Psig2 = Psig2 / (float)length;//
Psig2 = Psig2 * Psig2;//
Ptot2 = Ptot / (float)length;//
SNR = Psig / (Ptot - Psig);
SNR_dB_Hz = 10 * log10(SNR) + 10 * log10(fs_in/2) - 10 * log10((float)code_length);
SNR_dB_Hz = 10 * log10(Psig2 / (Ptot2 - Psig2)) + 10 * log10(fs_in/2) - 10 * log10((float)code_length * 1023000 /fs_in ); // 10 * log10(SNR) + 10 * log10(fs_in/2) - 10 * log10((float)code_length);
SNR_dB_Hz2 = 10 * log10(Psig2 / (Ptot2 - Psig2)) + 10 * log10(fs_in/2) - 10 * log10((float)code_length);
//std::cout << "CNO = " << SNR_dB_Hz << " old: " << SNR_dB_Hz2 << " code_length: " << code_length << std::endl;
return SNR_dB_Hz;
}