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Experiment to resolve prs code doppler bias

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Not fully resolved yet. Thinking it may be due to a numerical precision
issue.
This commit is contained in:
Cillian O'Driscoll
2015-11-19 15:15:06 +00:00
parent 4460a440e0
commit 21f4de8ea3
1 changed files with 7 additions and 2 deletions
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9
src/algorithms/tracking/gnuradio_blocks/galileo_e1_prs_veml_tracking_cc.cc
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@@ -749,7 +749,12 @@ int galileo_e1_prs_veml_tracking_cc::general_work (int noutput_items,gr_vector_i
// Now update the code and carrier phase estimates:
d_code_phase_chips_prs += T*d_code_freq_chips_prs;
d_code_phase_chips_prs = std::fmod( d_code_phase_chips_prs, d_prs_code_gen->get_code_length() );
//d_code_phase_chips_prs = std::fmod( d_code_phase_chips_prs,
//static_cast<double>( d_prs_code_gen->get_code_length() ) );
if( d_code_freq_chips_prs >= static_cast< double >( d_prs_code_gen->get_code_length() ) )
{
d_code_freq_chips_prs -= static_cast< double >( d_prs_code_gen->get_code_length() );
}
//DLOG(INFO) << "Propagated PRS code phase: " << std::fixed << std::setprecision( 12 ) << T*d_code_freq_chips_prs;
d_carrier_phase_rad_prs += T*2.0*M_PI*d_carrier_doppler_hz_prs;
@@ -1170,7 +1175,7 @@ int galileo_e1_prs_veml_tracking_cc::general_work (int noutput_items,gr_vector_i
// carrier and code frequency
d_dump_file.write(reinterpret_cast<char*>(&d_carrier_doppler_hz_prs), sizeof(float));
tmp_float = static_cast<float>(d_code_freq_chips_prs);
d_dump_file.write(reinterpret_cast<char*>(&tmp_float), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&d_code_freq_chips_prs), sizeof(double));
//PLL commands
d_dump_file.write(reinterpret_cast<char*>(&carr_error_hz_prs), sizeof(float));
d_dump_file.write(reinterpret_cast<char*>(&carr_error_filt_hz_prs), sizeof(float));