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Add chip shift to glonass ca code

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This commit is contained in:
Gastd 2017-06-01 20:49:44 -03:00
parent e291d95658
commit 34b813d84d
2 changed files with 8 additions and 6 deletions
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8
src/algorithms/libs/glonass_l1_signal_processing.cc
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@ -34,7 +34,7 @@
auto auxCeil = [](float x){ return static_cast<int>(static_cast<long>((x)+1)); };
void glonass_l1_ca_code_gen_complex(std::complex<float>* _dest/*, signed int _prn, unsigned int _chip_shift*/)
void glonass_l1_ca_code_gen_complex(std::complex<float>* _dest,/* signed int _prn,*/ unsigned int _chip_shift)
{
const unsigned int _code_length = 511;
bool G1[_code_length];
@ -76,13 +76,15 @@ void glonass_l1_ca_code_gen_complex(std::complex<float>* _dest/*, signed int _pr
_dest[lcv] = std::complex<float>(-1, 0);
}
}
/* TODO: Implement the chip shifting*/
}
/*
* Generates complex GLONASS L1 C/A code for the desired SV ID and sampled to specific sampling frequency
*/
void glonass_l1_ca_code_gen_complex_sampled(std::complex<float>* _dest, unsigned int _prn, signed int _fs, unsigned int _chip_shift)
void glonass_l1_ca_code_gen_complex_sampled(std::complex<float>* _dest,/* unsigned int _prn,*/ signed int _fs, unsigned int _chip_shift)
{
// This function is based on the GNU software GPS for MATLAB in the Kay Borre book
std::complex<float> _code[511];
@ -99,7 +101,7 @@ void glonass_l1_ca_code_gen_complex_sampled(std::complex<float>* _dest, unsigned
//--- Find time constants --------------------------------------------------
_ts = 1.0 / static_cast<float>(_fs); // Sampling period in sec
_tc = 1.0 / static_cast<float>(_codeFreqBasis); // C/A chip period in sec
glonass_l1_ca_code_gen_complex(_code); //generate C/A code 1 sample per chip
glonass_l1_ca_code_gen_complex(_code, _chip_shift); //generate C/A code 1 sample per chip
for (signed int i = 0; i < _samplesPerCode; i++)
{

6
src/algorithms/libs/glonass_l1_signal_processing.h
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@ -36,12 +36,12 @@
#include <complex>
//!Generates complex GLONASS L1 C/A code for the desired SV ID and code shift, and sampled to specific sampling frequency
void glonass_l1_ca_code_gen_complex(std::complex<float>* _dest/*, signed int _prn, unsigned int _chip_shift*/);
void glonass_l1_ca_code_gen_complex(std::complex<float>* _dest, /*signed int _prn,*/ unsigned int _chip_shift);
//! Generates N complex GLONASS L1 C/A codes for the desired SV ID and code shift
void glonass_l1_ca_code_gen_complex_sampled(std::complex<float>* _dest, unsigned int _prn, signed int _fs, unsigned int _chip_shift, unsigned int _ncodes);
void glonass_l1_ca_code_gen_complex_sampled(std::complex<float>* _dest,/* unsigned int _prn,*/ signed int _fs, unsigned int _chip_shift, unsigned int _ncodes);
//! Generates complex GLONASS L1 C/A code for the desired SV ID and code shift
void glonass_l1_ca_code_gen_complex_sampled(std::complex<float>* _dest, unsigned int _prn, signed int _fs, unsigned int _chip_shift);
void glonass_l1_ca_code_gen_complex_sampled(std::complex<float>* _dest,/* unsigned int _prn,*/ signed int _fs, unsigned int _chip_shift);
#endif /* GNSS_SDR_GPS_SDR_SIGNAL_PROCESSING_H_ */