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Adding documentation and improving code formatting.

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git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@103 64b25241-fba3-4117-9849-534c7e92360d
This commit is contained in:
Carles Fernandez
2011-12-28 21:36:45 +00:00
parent 48719c3075
commit 2ce62706af
80 changed files with 1568 additions and 1498 deletions
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46
src/algorithms/tracking/libs/tracking_discriminators.cc
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@@ -1,6 +1,7 @@
/*!
* \file tracking_discriminators.cc
* \brief Library with a set of code tracking and carrier tracking discriminators that is used by the tracking algorithms
* \brief Implementation of a library with a set of code tracking
* and carrier tracking discriminators that is used by the tracking algorithms.
* \author Javier Arribas, 2011. jarribas(at)cttc.es
*
*
@@ -33,7 +34,7 @@
#include <math.h>
// All the outputs are in RADIANS
/*!
/*
* FLL four quadrant arctan discriminator:
* \f{equation}
* \frac{\phi_2-\phi_1}{t_2-t1}=\frac{ATAN2(cross,dot)}{t_1-t_2},
@@ -45,13 +46,14 @@
float fll_four_quadrant_atan(gr_complex prompt_s1, gr_complex prompt_s2,float t1, float t2)
{
float cross,dot;
dot=prompt_s1.imag()*prompt_s2.imag()+prompt_s1.real()*prompt_s2.real();
cross=prompt_s1.imag()*prompt_s2.real()-prompt_s2.imag()*prompt_s1.real();
return atan2(cross,dot)/(t2-t1);
float cross,dot;
dot=prompt_s1.imag()*prompt_s2.imag()+prompt_s1.real()*prompt_s2.real();
cross=prompt_s1.imag()*prompt_s2.real()-prompt_s2.imag()*prompt_s1.real();
return atan2(cross,dot)/(t2-t1);
}
/*!
/*
* PLL four quadrant arctan discriminator:
* \f{equation}
* \phi=ATAN2(Q_{PS},I_{PS}),
@@ -60,27 +62,29 @@ float fll_four_quadrant_atan(gr_complex prompt_s1, gr_complex prompt_s2,float t1
*/
float pll_four_quadrant_atan(gr_complex prompt_s1)
{
return atan2(prompt_s1.real(),prompt_s1.imag());
return atan2(prompt_s1.real(),prompt_s1.imag());
}
/*!
/*
* PLL Costas loop two quadrant arctan discriminator:
* \f{equation}
* \phi=ATAN\left(\frac{Q_{PS}}{I_{PS}}\right),
* \f}
* where \f$I_{PS1},Q_{PS1}\f$ are the inphase and quadrature prompt correlator outputs respectively. The output is in [radians].
*/
float pll_cloop_two_quadrant_atan(gr_complex prompt_s1)
{
if (prompt_s1.imag()!=0.0)
{
return atan(prompt_s1.real()/prompt_s1.imag());
}else{
return 0;
}
if (prompt_s1.imag()!=0.0)
{
return atan(prompt_s1.real()/prompt_s1.imag());
}else{
return 0;
}
}
/*!
/*
* DLL Noncoherent Early minus Late envelope normalized discriminator:
* \f{equation}
* error=\frac{E-L}{E+L},
@@ -90,8 +94,8 @@ float pll_cloop_two_quadrant_atan(gr_complex prompt_s1)
*/
float dll_nc_e_minus_l_normalized(gr_complex early_s1, gr_complex late_s1)
{
float P_early, P_late;
P_early=std::abs(early_s1);
P_late=std::abs(late_s1);
return (P_early-P_late)/((P_early+P_late));
float P_early, P_late;
P_early=std::abs(early_s1);
P_late=std::abs(late_s1);
return (P_early-P_late)/((P_early+P_late));
}