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Assorted improvements to PRS tracking

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This commit is contained in:
Cillian O'Driscoll
2015-11-18 14:43:00 +00:00
parent fe33f9e0e2
commit ef5c79b074
1 changed files with 14 additions and 1 deletions
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15
src/algorithms/tracking/gnuradio_blocks/galileo_e1_prs_de_tracking_cc.cc
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@@ -976,7 +976,9 @@ int galileo_e1_prs_de_tracking_cc::general_work (int noutput_items,gr_vector_int
if (d_cn0_estimation_counter < CN0_ESTIMATION_SAMPLES)
{
// fill buffer with prompt correlator output values
d_Prompt_buffer[d_cn0_estimation_counter] = *d_Prompt_Subcarrier_Prompt_Code;
d_Prompt_buffer[d_cn0_estimation_counter] = ( d_prs_tracking_enabled ?
*d_Prompt_Subcarrier_Prompt_Code_prs :
*d_Prompt_Subcarrier_Prompt_Code );
d_cn0_estimation_counter++;
}
else
@@ -1013,6 +1015,8 @@ int galileo_e1_prs_de_tracking_cc::general_work (int noutput_items,gr_vector_int
}
d_carrier_lock_fail_counter = 0;
d_enable_tracking = false; // TODO: check if disabling tracking is consistent with the channel state machine
d_prs_tracking_enabled = false;
d_tow_received = false;
}
if( d_carrier_lock_success_counter > MINIMUM_LOCK_SUCCESS_COUNTER )
@@ -1029,6 +1033,9 @@ int galileo_e1_prs_de_tracking_cc::general_work (int noutput_items,gr_vector_int
d_carrier_loop_filter.initialize( carr_error_filt_hz );
d_carrier_lock_fail_counter = 0;
// Try to enable prs tracking:
start_tracking_prs();
}
}
else // not d_carrier_locked
@@ -1040,10 +1047,12 @@ int galileo_e1_prs_de_tracking_cc::general_work (int noutput_items,gr_vector_int
d_carrier_lock_fail_counter = 0;
d_carrier_locked = false;
d_code_loop_filter.set_noise_bandwidth( d_initial_dll_bw_hz );
d_subcarrier_loop_filter.set_noise_bandwidth( d_initial_sll_bw_hz );
d_carrier_loop_filter.set_noise_bandwidth( d_initial_pll_bw_hz );
d_early_late_code_spc_chips = d_initial_early_late_code_space_chips;
d_code_loop_filter.initialize( code_error_filt_chips );
d_carrier_loop_filter.initialize( carr_error_filt_hz );
d_subcarrier_loop_filter.initialize( subcarrier_error_filt_cycles );
}
}
@@ -1286,6 +1295,9 @@ void galileo_e1_prs_de_tracking_cc::set_gnss_synchro(Gnss_Synchro* p_gnss_synchr
void galileo_e1_prs_de_tracking_cc::start_tracking_prs()
{
if( d_prs_tracking_enabled ){
return;
}
// Initialise the code/phase and subcarrier estimates:
double time_since_tow = static_cast< double >( d_sample_counter ) /
static_cast<double>( d_fs_in ) - d_timestamp_last_tow;
@@ -1352,6 +1364,7 @@ void galileo_e1_prs_de_tracking_cc::start_tracking_prs()
d_prs_tracking_enabled = true;
d_prs_code_gen->set_prn( d_acquisition_gnss_synchro->PRN );
d_code_locked_prs = false;
d_cn0_estimation_counter = 0;
LOG(INFO) << "PULL-IN Doppler [Hz]=" << d_carrier_doppler_hz_prs
<< " PULL-IN Code Phase [samples]=" << d_code_phase_chips_prs;