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Linear regressor implemented in observables

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This commit is contained in:
Javier Arribas
2015-11-24 13:37:01 +01:00
parent 411c8cedb0
commit 15c4882af9
5 changed files with 68 additions and 9 deletions
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10
src/algorithms/tracking/gnuradio_blocks/gps_l1_ca_dll_pll_artemisa_tracking_cc.cc
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@@ -345,18 +345,22 @@ int gps_l1_ca_dll_pll_artemisa_tracking_cc::general_work (int noutput_items, gr_
//carrier phase accumulator for (K) doppler estimation
//d_acc_carrier_phase_cycles -= (d_carrier_doppler_hz*INTEGRATION_TIME);
old_d_acc_carrier_phase_cycles=d_acc_carrier_phase_cycles;
d_acc_carrier_phase_cycles -= static_cast<double>(d_carrier_doppler_hz)*INTEGRATION_TIME;
d_acc_carrier_phase_cycles += static_cast<double>(d_carrier_doppler_hz)*d_current_prn_length_samples/static_cast<double>(d_fs_in);//INTEGRATION_TIME;
// PLL to DLL assistance [Secs/Ti]
d_pll_to_dll_assist_secs_Ti = (d_carrier_doppler_hz*GPS_L1_CA_CODE_PERIOD)/GPS_L1_FREQ_HZ;
// code frequency (include code Doppler estimation here)
d_code_freq_chips = GPS_L1_CA_CODE_RATE_HZ;
d_code_freq_chips = GPS_L1_CA_CODE_RATE_HZ + ((d_carrier_doppler_hz * GPS_L1_CA_CODE_RATE_HZ) / GPS_L1_FREQ_HZ);//GPS_L1_CA_CODE_RATE_HZ;
// ################## CARRIER AND CODE NCO BUFFER ALIGNEMENT #######################
// keep alignment parameters for the next input buffer
double T_chip_seconds;
double T_prn_seconds;
double T_prn_samples;
double K_blk_samples;
// Compute the next buffer length based in the new period of the PRN sequence and the code phase error estimation
T_prn_samples = GPS_L1_CA_CODE_PERIOD * static_cast<double>(d_fs_in);
T_chip_seconds = 1 / static_cast<double>(d_code_freq_chips);
T_prn_seconds = T_chip_seconds * GPS_L1_CA_CODE_LENGTH_CHIPS;
T_prn_samples = T_prn_seconds * static_cast<double>(d_fs_in);
K_blk_samples = T_prn_samples + d_rem_code_phase_samples - static_cast<double>(dll_code_error_secs_Ti) * static_cast<double>(d_fs_in);
d_current_prn_length_samples = round(K_blk_samples); //round to a discrete samples
old_d_rem_code_phase_samples=d_rem_code_phase_samples;