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https://github.com/gnss-sdr/gnss-sdr
synced 2024-12-15 20:50:33 +00:00
Add chip shift to glonass ca code
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@ -34,7 +34,7 @@
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auto auxCeil = [](float x){ return static_cast<int>(static_cast<long>((x)+1)); };
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auto auxCeil = [](float x){ return static_cast<int>(static_cast<long>((x)+1)); };
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void glonass_l1_ca_code_gen_complex(std::complex<float>* _dest/*, signed int _prn, unsigned int _chip_shift*/)
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void glonass_l1_ca_code_gen_complex(std::complex<float>* _dest,/* signed int _prn,*/ unsigned int _chip_shift)
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{
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{
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const unsigned int _code_length = 511;
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const unsigned int _code_length = 511;
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bool G1[_code_length];
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bool G1[_code_length];
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@ -76,13 +76,15 @@ void glonass_l1_ca_code_gen_complex(std::complex<float>* _dest/*, signed int _pr
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_dest[lcv] = std::complex<float>(-1, 0);
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_dest[lcv] = std::complex<float>(-1, 0);
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}
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}
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}
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}
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/* TODO: Implement the chip shifting*/
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}
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}
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/*
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/*
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* Generates complex GLONASS L1 C/A code for the desired SV ID and sampled to specific sampling frequency
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* Generates complex GLONASS L1 C/A code for the desired SV ID and sampled to specific sampling frequency
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*/
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*/
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void glonass_l1_ca_code_gen_complex_sampled(std::complex<float>* _dest, unsigned int _prn, signed int _fs, unsigned int _chip_shift)
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void glonass_l1_ca_code_gen_complex_sampled(std::complex<float>* _dest,/* unsigned int _prn,*/ signed int _fs, unsigned int _chip_shift)
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{
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{
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// This function is based on the GNU software GPS for MATLAB in the Kay Borre book
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// This function is based on the GNU software GPS for MATLAB in the Kay Borre book
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std::complex<float> _code[511];
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std::complex<float> _code[511];
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@ -99,7 +101,7 @@ void glonass_l1_ca_code_gen_complex_sampled(std::complex<float>* _dest, unsigned
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//--- Find time constants --------------------------------------------------
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//--- Find time constants --------------------------------------------------
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_ts = 1.0 / static_cast<float>(_fs); // Sampling period in sec
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_ts = 1.0 / static_cast<float>(_fs); // Sampling period in sec
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_tc = 1.0 / static_cast<float>(_codeFreqBasis); // C/A chip period in sec
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_tc = 1.0 / static_cast<float>(_codeFreqBasis); // C/A chip period in sec
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glonass_l1_ca_code_gen_complex(_code); //generate C/A code 1 sample per chip
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glonass_l1_ca_code_gen_complex(_code, _chip_shift); //generate C/A code 1 sample per chip
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for (signed int i = 0; i < _samplesPerCode; i++)
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for (signed int i = 0; i < _samplesPerCode; i++)
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{
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{
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@ -36,12 +36,12 @@
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#include <complex>
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#include <complex>
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//!Generates complex GLONASS L1 C/A code for the desired SV ID and code shift, and sampled to specific sampling frequency
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//!Generates complex GLONASS L1 C/A code for the desired SV ID and code shift, and sampled to specific sampling frequency
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void glonass_l1_ca_code_gen_complex(std::complex<float>* _dest/*, signed int _prn, unsigned int _chip_shift*/);
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void glonass_l1_ca_code_gen_complex(std::complex<float>* _dest, /*signed int _prn,*/ unsigned int _chip_shift);
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//! Generates N complex GLONASS L1 C/A codes for the desired SV ID and code shift
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//! Generates N complex GLONASS L1 C/A codes for the desired SV ID and code shift
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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);
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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);
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//! Generates complex GLONASS L1 C/A code for the desired SV ID and code shift
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//! Generates complex GLONASS L1 C/A code for the desired SV ID and code shift
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void glonass_l1_ca_code_gen_complex_sampled(std::complex<float>* _dest, unsigned int _prn, signed int _fs, unsigned int _chip_shift);
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void glonass_l1_ca_code_gen_complex_sampled(std::complex<float>* _dest,/* unsigned int _prn,*/ signed int _fs, unsigned int _chip_shift);
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#endif /* GNSS_SDR_GPS_SDR_SIGNAL_PROCESSING_H_ */
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#endif /* GNSS_SDR_GPS_SDR_SIGNAL_PROCESSING_H_ */
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