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bds b3i: Adding code to process BeiDou B3I signals

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Adds code to perform acq and trk in BeiDou B3I signals. Stages of
telemetry decoding, observables computation and pvt use existing
code on the platform. Some further testing is required
This commit is contained in:
Damian Miralles
2019-01-25 15:43:00 -06:00
parent 5395b0bc3b
commit e78ba653e6
32 changed files with 2862 additions and 333 deletions
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60
src/algorithms/tracking/gnuradio_blocks/dll_pll_veml_tracking.cc
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@@ -41,11 +41,13 @@
#include "Galileo_E1.h"
#include "Galileo_E5a.h"
#include "Beidou_B1I.h"
#include "Beidou_B3I.h"
#include "MATH_CONSTANTS.h"
#include "control_message_factory.h"
#include "galileo_e1_signal_processing.h"
#include "galileo_e5_signal_processing.h"
#include "beidou_b1i_signal_processing.h"
#include "beidou_b3i_signal_processing.h"
#include "gnss_sdr_create_directory.h"
#include "gps_l2c_signal.h"
#include "gps_l5_signal.h"
@@ -110,6 +112,7 @@ dll_pll_veml_tracking::dll_pll_veml_tracking(const Dll_Pll_Conf &conf_) : gr::bl
map_signal_pretty_name["5X"] = "E5a";
map_signal_pretty_name["L5"] = "L5";
map_signal_pretty_name["B1"] = "B1I";
map_signal_pretty_name["B3"] = "B3I";
signal_pretty_name = map_signal_pretty_name[signal_type];
@@ -293,6 +296,22 @@ dll_pll_veml_tracking::dll_pll_veml_tracking(const Dll_Pll_Conf &conf_) : gr::bl
d_secondary_code_length = static_cast<unsigned int>(BEIDOU_B1I_SECONDARY_CODE_LENGTH);
d_secondary_code_string = const_cast<std::string *>(&BEIDOU_B1I_SECONDARY_CODE_STR);
}
else if (signal_type == "B3")
{
// GEO Satellites use different secondary code
d_signal_carrier_freq = BEIDOU_B3I_FREQ_HZ;
d_code_period = BEIDOU_B3I_CODE_PERIOD;
d_code_chip_rate = BEIDOU_B3I_CODE_RATE_HZ;
d_code_length_chips = static_cast<unsigned int>(BEIDOU_B3I_CODE_LENGTH_CHIPS);
d_symbols_per_bit = BEIDOU_B3I_TELEMETRY_SYMBOLS_PER_BIT;
d_correlation_length_ms = 1;
d_code_samples_per_chip = 1;
d_secondary = true;
trk_parameters.track_pilot = false;
interchange_iq = false;
d_secondary_code_length = static_cast<unsigned int>(BEIDOU_B3I_SECONDARY_CODE_LENGTH);
d_secondary_code_string = const_cast<std::string *>(&BEIDOU_B3I_SECONDARY_CODE_STR);
}
else
{
LOG(WARNING) << "Invalid Signal argument when instantiating tracking blocks";
@@ -612,6 +631,47 @@ void dll_pll_veml_tracking::start_tracking()
}
else if (systemName == "Beidou" and signal_type == "B3")
{
beidou_b3i_code_gen_float(d_tracking_code, d_acquisition_gnss_synchro->PRN, 0);
// Update secondary code settings for geo satellites
if(d_acquisition_gnss_synchro->PRN > 0 and d_acquisition_gnss_synchro->PRN < 6)
{
d_symbols_per_bit = 2;
d_correlation_length_ms = 1;
d_code_samples_per_chip = 1;
d_secondary = false;
trk_parameters.track_pilot = false;
interchange_iq = false;
d_secondary_code_length = 0;
d_secondary_code_string = const_cast<std::string *>(&BEIDOU_B3I_D2_SECONDARY_CODE_STR);
// preamble bits to sampled symbols
d_preamble_length_symbols = 22;
d_preambles_symbols = static_cast<int32_t *>(volk_gnsssdr_malloc(22 * sizeof(int32_t), volk_gnsssdr_get_alignment()));
int32_t n = 0;
uint16_t preambles_bits[BEIDOU_B3I_PREAMBLE_LENGTH_BITS] = {1,1,1,0,0,0,1,0,0,1,0};
for (uint16_t preambles_bit : preambles_bits)
{
for (uint32_t j = 0; j < d_symbols_per_bit; j++)
{
if (preambles_bit == 1)
{
d_preambles_symbols[n] = 1;
}
else
{
d_preambles_symbols[n] = -1;
}
n++;
}
}
d_symbol_history.resize(22); // Change fixed buffer size
d_symbol_history.clear();
}
}
multicorrelator_cpu.set_local_code_and_taps(d_code_samples_per_chip * d_code_length_chips, d_tracking_code, d_local_code_shift_chips);
std::fill_n(d_correlator_outs, d_n_correlator_taps, gr_complex(0.0, 0.0));