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Make lighter comparisons

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This commit is contained in:
Carles Fernandez
2025-02-08 09:03:52 +01:00
parent 11a77ee918
commit 8e4dcd08be
5 changed files with 16 additions and 26 deletions
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22
src/algorithms/tracking/libs/lock_detectors.cc
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@@ -34,7 +34,6 @@
#include "lock_detectors.h"
#include <cmath>
#include <limits>
/*
* Signal-to-Noise (SNR) (\f$\rho\f$) estimator using the Signal-to-Noise Variance (SNV) estimator:
@@ -58,8 +57,7 @@ float cn0_svn_estimator(const gr_complex* Prompt_buffer, int length, float coh_i
float SNR_dB_Hz = 0.0;
float Psig = 0.0;
float Ptot = 0.0;
const float epsilon = std::numeric_limits<float>::epsilon();
if (length == 0 || coh_integration_time_s < epsilon)
if (length == 0 || coh_integration_time_s == 0.0)
{
return -100.0;
}
@@ -72,14 +70,11 @@ float cn0_svn_estimator(const gr_complex* Prompt_buffer, int length, float coh_i
Psig = Psig * Psig;
Ptot /= static_cast<float>(length);
float aux = Ptot - Psig;
if (aux > epsilon)
{
SNR = Psig / aux;
}
else
if (aux == 0.0)
{
return -100.0;
}
SNR = Psig / aux;
SNR_dB_Hz = 10.0F * std::log10(SNR) - 10.0F * std::log10(coh_integration_time_s);
return SNR_dB_Hz;
}
@@ -110,8 +105,7 @@ float cn0_m2m4_estimator(const gr_complex* Prompt_buffer, int length, float coh_
float m_4 = 0.0;
float aux;
const auto n = static_cast<float>(length);
const float epsilon = std::numeric_limits<float>::epsilon();
if (length == 0 || coh_integration_time_s <= epsilon)
if (length == 0 || coh_integration_time_s == 0.0)
{
return -100.0;
}
@@ -131,7 +125,7 @@ float cn0_m2m4_estimator(const gr_complex* Prompt_buffer, int length, float coh_
if (std::isnan(aux))
{
denominator = m_2 - Psig;
if (std::fabs(denominator) < epsilon)
if (denominator == 0)
{
return -100.0;
}
@@ -140,14 +134,14 @@ float cn0_m2m4_estimator(const gr_complex* Prompt_buffer, int length, float coh_
else
{
denominator = m_2 - aux;
if (std::fabs(denominator) < epsilon)
if (denominator == 0)
{
return -100.0;
}
SNR_aux = aux / denominator;
}
if (std::fabs(SNR_aux) < epsilon)
if (SNR_aux == 0)
{
return -100.0;
}
@@ -179,7 +173,7 @@ float carrier_lock_detector(const gr_complex* Prompt_buffer, int length)
}
NBP = tmp_sum_I * tmp_sum_I + tmp_sum_Q * tmp_sum_Q;
NBD = tmp_sum_I * tmp_sum_I - tmp_sum_Q * tmp_sum_Q;
if (NBP < std::numeric_limits<float>::epsilon())
if (NBP == 0)
{
return 0.0;
}