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Accept non-integer number of samples per code period

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This commit is contained in:
Carles Fernandez 2018-07-13 14:23:14 +02:00
parent 92a6676b9e
commit 0352108a79
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GPG Key ID: 4C583C52B0C3877D
10 changed files with 33 additions and 24 deletions
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10
src/algorithms/acquisition/adapters/galileo_e1_pcps_ambiguous_acquisition.cc
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@ -64,6 +64,11 @@ GalileoE1PcpsAmbiguousAcquisition::GalileoE1PcpsAmbiguousAcquisition(
acq_parameters.doppler_max = doppler_max_; acq_parameters.doppler_max = doppler_max_;
sampled_ms_ = configuration_->property(role + ".coherent_integration_time_ms", 4); sampled_ms_ = configuration_->property(role + ".coherent_integration_time_ms", 4);
acq_parameters.sampled_ms = sampled_ms_; acq_parameters.sampled_ms = sampled_ms_;
if ((acq_parameters.sampled_ms % 4) != 0)
{
LOG(WARNING) << "Parameter coherent_integration_time_ms should be a multiple of 4. Setting it to 4";
acq_parameters.sampled_ms = 4;
}
bit_transition_flag_ = configuration_->property(role + ".bit_transition_flag", false); bit_transition_flag_ = configuration_->property(role + ".bit_transition_flag", false);
acq_parameters.bit_transition_flag = bit_transition_flag_; acq_parameters.bit_transition_flag = bit_transition_flag_;
use_CFAR_algorithm_flag_ = configuration_->property(role + ".use_CFAR_algorithm", true); //will be false in future versions use_CFAR_algorithm_flag_ = configuration_->property(role + ".use_CFAR_algorithm", true); //will be false in future versions
@ -80,9 +85,10 @@ GalileoE1PcpsAmbiguousAcquisition::GalileoE1PcpsAmbiguousAcquisition(
acq_parameters.dump_filename = dump_filename_; acq_parameters.dump_filename = dump_filename_;
//--- Find number of samples per spreading code (4 ms) ----------------- //--- Find number of samples per spreading code (4 ms) -----------------
code_length_ = static_cast<unsigned int>(std::round(static_cast<double>(fs_in_) / (Galileo_E1_CODE_CHIP_RATE_HZ / Galileo_E1_B_CODE_LENGTH_CHIPS))); code_length_ = static_cast<unsigned int>(std::round(static_cast<double>(fs_in_) / (Galileo_E1_CODE_CHIP_RATE_HZ / Galileo_E1_B_CODE_LENGTH_CHIPS)));
acq_parameters.samples_per_code = code_length_;
int samples_per_ms = static_cast<int>(std::round(static_cast<double>(fs_in_) * 0.001)); float samples_per_ms = static_cast<float>(fs_in_) * 0.001;
acq_parameters.samples_per_ms = samples_per_ms; acq_parameters.samples_per_ms = samples_per_ms;
acq_parameters.samples_per_code = acq_parameters.samples_per_ms * static_cast<float>(Galileo_E1_CODE_PERIOD_MS);
vector_length_ = sampled_ms_ * samples_per_ms; vector_length_ = sampled_ms_ * samples_per_ms;
if (bit_transition_flag_) if (bit_transition_flag_)

4
src/algorithms/acquisition/adapters/galileo_e5a_pcps_acquisition.cc
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@ -101,9 +101,9 @@ GalileoE5aPcpsAcquisition::GalileoE5aPcpsAcquisition(ConfigurationInterface* con
LOG(WARNING) << item_type_ << " unknown acquisition item type"; LOG(WARNING) << item_type_ << " unknown acquisition item type";
} }
acq_parameters.it_size = item_size_; acq_parameters.it_size = item_size_;
acq_parameters.samples_per_code = code_length_; acq_parameters.samples_per_ms = static_cast<float>(fs_in_) * 0.001;
acq_parameters.samples_per_ms = code_length_;
acq_parameters.sampled_ms = sampled_ms_; acq_parameters.sampled_ms = sampled_ms_;
acq_parameters.samples_per_code = acq_parameters.samples_per_ms * static_cast<float>(GALILEO_E5a_CODE_PERIOD_MS);
acq_parameters.num_doppler_bins_step2 = configuration_->property(role + ".second_nbins", 4); acq_parameters.num_doppler_bins_step2 = configuration_->property(role + ".second_nbins", 4);
acq_parameters.doppler_step2 = configuration_->property(role + ".second_doppler_step", 125.0); acq_parameters.doppler_step2 = configuration_->property(role + ".second_doppler_step", 125.0);
acq_parameters.make_2_steps = configuration_->property(role + ".make_two_steps", false); acq_parameters.make_2_steps = configuration_->property(role + ".make_two_steps", false);

4
src/algorithms/acquisition/adapters/glonass_l1_ca_pcps_acquisition.cc
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@ -100,8 +100,8 @@ GlonassL1CaPcpsAcquisition::GlonassL1CaPcpsAcquisition(
} }
acq_parameters.it_size = item_size_; acq_parameters.it_size = item_size_;
acq_parameters.sampled_ms = sampled_ms_; acq_parameters.sampled_ms = sampled_ms_;
acq_parameters.samples_per_ms = code_length_; acq_parameters.samples_per_ms = static_cast<float>(fs_in_) * 0.001;
acq_parameters.samples_per_code = code_length_; acq_parameters.samples_per_code = acq_parameters.samples_per_ms * static_cast<float>(GLONASS_L1_CA_CODE_PERIOD);
acq_parameters.num_doppler_bins_step2 = configuration_->property(role + ".second_nbins", 4); acq_parameters.num_doppler_bins_step2 = configuration_->property(role + ".second_nbins", 4);
acq_parameters.doppler_step2 = configuration_->property(role + ".second_doppler_step", 125.0); acq_parameters.doppler_step2 = configuration_->property(role + ".second_doppler_step", 125.0);
acq_parameters.make_2_steps = configuration_->property(role + ".make_two_steps", false); acq_parameters.make_2_steps = configuration_->property(role + ".make_two_steps", false);

4
src/algorithms/acquisition/adapters/glonass_l2_ca_pcps_acquisition.cc
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@ -99,8 +99,8 @@ GlonassL2CaPcpsAcquisition::GlonassL2CaPcpsAcquisition(
} }
acq_parameters.it_size = item_size_; acq_parameters.it_size = item_size_;
acq_parameters.sampled_ms = sampled_ms_; acq_parameters.sampled_ms = sampled_ms_;
acq_parameters.samples_per_ms = code_length_; acq_parameters.samples_per_ms = static_cast<float>(fs_in_) * 0.001;
acq_parameters.samples_per_code = code_length_; acq_parameters.samples_per_code = acq_parameters.samples_per_ms * static_cast<float>(GLONASS_L2_CA_CODE_PERIOD * 1000.0);
acq_parameters.num_doppler_bins_step2 = configuration_->property(role + ".second_nbins", 4); acq_parameters.num_doppler_bins_step2 = configuration_->property(role + ".second_nbins", 4);
acq_parameters.doppler_step2 = configuration_->property(role + ".second_doppler_step", 125.0); acq_parameters.doppler_step2 = configuration_->property(role + ".second_doppler_step", 125.0);
acq_parameters.make_2_steps = configuration_->property(role + ".make_two_steps", false); acq_parameters.make_2_steps = configuration_->property(role + ".make_two_steps", false);

4
src/algorithms/acquisition/adapters/gps_l1_ca_pcps_acquisition.cc
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@ -102,8 +102,8 @@ GpsL1CaPcpsAcquisition::GpsL1CaPcpsAcquisition(
{ {
item_size_ = sizeof(gr_complex); item_size_ = sizeof(gr_complex);
} }
acq_parameters.samples_per_ms = code_length_; acq_parameters.samples_per_ms = static_cast<float>(fs_in_) * 0.001;
acq_parameters.samples_per_code = code_length_; acq_parameters.samples_per_code = acq_parameters.samples_per_ms * static_cast<float>(GPS_L1_CA_CODE_PERIOD * 1000.0);
acq_parameters.it_size = item_size_; acq_parameters.it_size = item_size_;
acq_parameters.blocking_on_standby = configuration_->property(role + ".blocking_on_standby", false); acq_parameters.blocking_on_standby = configuration_->property(role + ".blocking_on_standby", false);
acquisition_ = pcps_make_acquisition(acq_parameters); acquisition_ = pcps_make_acquisition(acq_parameters);

11
src/algorithms/acquisition/adapters/gps_l2_m_pcps_acquisition.cc
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@ -78,11 +78,16 @@ GpsL2MPcpsAcquisition::GpsL2MPcpsAcquisition(
dump_filename_ = configuration_->property(role + ".dump_filename", default_dump_filename); dump_filename_ = configuration_->property(role + ".dump_filename", default_dump_filename);
acq_parameters.dump_filename = dump_filename_; acq_parameters.dump_filename = dump_filename_;
//--- Find number of samples per spreading code ------------------------- //--- Find number of samples per spreading code -------------------------
//code_length_ = std::round(static_cast<double>(fs_in_) / (GPS_L2_M_CODE_RATE_HZ / static_cast<double>(GPS_L2_M_CODE_LENGTH_CHIPS))); acq_parameters.samples_per_ms = static_cast<float>(fs_in_) * 0.001;
acq_parameters.samples_per_ms = static_cast<int>(std::round(static_cast<double>(fs_in_) * 0.001));
acq_parameters.sampled_ms = configuration_->property(role + ".coherent_integration_time_ms", 20); acq_parameters.sampled_ms = configuration_->property(role + ".coherent_integration_time_ms", 20);
if ((acq_parameters.sampled_ms % 20) != 0)
{
LOG(WARNING) << "Parameter coherent_integration_time_ms should be a multiple of 20. Setting it to 20";
acq_parameters.sampled_ms = 20;
}
code_length_ = acq_parameters.sampled_ms * acq_parameters.samples_per_ms * (acq_parameters.bit_transition_flag ? 2 : 1); code_length_ = acq_parameters.sampled_ms * acq_parameters.samples_per_ms * (acq_parameters.bit_transition_flag ? 2 : 1);
vector_length_ = code_length_; vector_length_ = code_length_;
if (bit_transition_flag_) if (bit_transition_flag_)
@ -101,7 +106,7 @@ GpsL2MPcpsAcquisition::GpsL2MPcpsAcquisition(
item_size_ = sizeof(gr_complex); item_size_ = sizeof(gr_complex);
} }
acq_parameters.samples_per_code = code_length_; acq_parameters.samples_per_code = acq_parameters.samples_per_ms * static_cast<float>(GPS_L2_M_PERIOD * 1000.0);
acq_parameters.it_size = item_size_; acq_parameters.it_size = item_size_;
acq_parameters.num_doppler_bins_step2 = configuration_->property(role + ".second_nbins", 4); acq_parameters.num_doppler_bins_step2 = configuration_->property(role + ".second_nbins", 4);

6
src/algorithms/acquisition/adapters/gps_l5i_pcps_acquisition.cc
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@ -96,10 +96,10 @@ GpsL5iPcpsAcquisition::GpsL5iPcpsAcquisition(
{ {
item_size_ = sizeof(gr_complex); item_size_ = sizeof(gr_complex);
} }
acq_parameters.samples_per_code = code_length_; acq_parameters.samples_per_ms = static_cast<float>(fs_in_) * 0.001;
acq_parameters.samples_per_ms = code_length_; acq_parameters.samples_per_code = acq_parameters.samples_per_ms * static_cast<float>(GPS_L5i_PERIOD * 1000.0);
acq_parameters.it_size = item_size_; acq_parameters.it_size = item_size_;
acq_parameters.sampled_ms = 1; acq_parameters.sampled_ms = configuration_->property(role + ".coherent_integration_time_ms", 1);
acq_parameters.num_doppler_bins_step2 = configuration_->property(role + ".second_nbins", 4); acq_parameters.num_doppler_bins_step2 = configuration_->property(role + ".second_nbins", 4);
acq_parameters.doppler_step2 = configuration_->property(role + ".second_doppler_step", 125.0); acq_parameters.doppler_step2 = configuration_->property(role + ".second_doppler_step", 125.0);
acq_parameters.make_2_steps = configuration_->property(role + ".make_two_steps", false); acq_parameters.make_2_steps = configuration_->property(role + ".make_two_steps", false);

6
src/algorithms/acquisition/gnuradio_blocks/pcps_acquisition.cc
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@ -565,7 +565,6 @@ void pcps_acquisition::acquisition_core(unsigned long int samp_count)
gr::thread::scoped_lock lk(d_setlock); gr::thread::scoped_lock lk(d_setlock);
// initialize acquisition algorithm // initialize acquisition algorithm
float magt = 0.0;
int doppler = 0; int doppler = 0;
uint32_t indext = 0; uint32_t indext = 0;
int effective_fft_size = (acq_parameters.bit_transition_flag ? d_fft_size / 2 : d_fft_size); int effective_fft_size = (acq_parameters.bit_transition_flag ? d_fft_size / 2 : d_fft_size);
@ -582,7 +581,6 @@ void pcps_acquisition::acquisition_core(unsigned long int samp_count)
} }
} }
const gr_complex* in = d_input_signal; // Get the input samples pointer const gr_complex* in = d_input_signal; // Get the input samples pointer
float fft_normalization_factor = static_cast<float>(d_fft_size) * static_cast<float>(d_fft_size);
d_input_power = 0.0; d_input_power = 0.0;
d_mag = 0.0; d_mag = 0.0;
@ -650,7 +648,7 @@ void pcps_acquisition::acquisition_core(unsigned long int samp_count)
{ {
d_test_statistics = first_vs_second_peak_statistic(indext, doppler, d_num_doppler_bins, acq_parameters.doppler_max, d_doppler_step); d_test_statistics = first_vs_second_peak_statistic(indext, doppler, d_num_doppler_bins, acq_parameters.doppler_max, d_doppler_step);
} }
d_gnss_synchro->Acq_delay_samples = static_cast<double>(indext % acq_parameters.samples_per_code); d_gnss_synchro->Acq_delay_samples = static_cast<double>(std::fmod(static_cast<float>(indext), acq_parameters.samples_per_code));
d_gnss_synchro->Acq_doppler_hz = static_cast<double>(doppler); d_gnss_synchro->Acq_doppler_hz = static_cast<double>(doppler);
d_gnss_synchro->Acq_samplestamp_samples = samp_count; d_gnss_synchro->Acq_samplestamp_samples = samp_count;
} }
@ -691,7 +689,7 @@ void pcps_acquisition::acquisition_core(unsigned long int samp_count)
{ {
d_test_statistics = first_vs_second_peak_statistic(indext, doppler, acq_parameters.num_doppler_bins_step2, static_cast<int>(d_doppler_center_step_two - (static_cast<float>(acq_parameters.num_doppler_bins_step2) / 2.0) * acq_parameters.doppler_step2), acq_parameters.doppler_step2); d_test_statistics = first_vs_second_peak_statistic(indext, doppler, acq_parameters.num_doppler_bins_step2, static_cast<int>(d_doppler_center_step_two - (static_cast<float>(acq_parameters.num_doppler_bins_step2) / 2.0) * acq_parameters.doppler_step2), acq_parameters.doppler_step2);
} }
d_gnss_synchro->Acq_delay_samples = static_cast<double>(indext % acq_parameters.samples_per_code); d_gnss_synchro->Acq_delay_samples = static_cast<double>(std::fmod(static_cast<float>(indext), acq_parameters.samples_per_code));
d_gnss_synchro->Acq_doppler_hz = static_cast<double>(doppler); d_gnss_synchro->Acq_doppler_hz = static_cast<double>(doppler);
d_gnss_synchro->Acq_samplestamp_samples = samp_count; d_gnss_synchro->Acq_samplestamp_samples = samp_count;
} }

4
src/algorithms/acquisition/libs/acq_conf.cc
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@ -41,8 +41,8 @@ Acq_Conf::Acq_Conf()
num_doppler_bins_step2 = 0; num_doppler_bins_step2 = 0;
doppler_step2 = 0.0; doppler_step2 = 0.0;
fs_in = 0; fs_in = 0;
samples_per_ms = 0; samples_per_ms = 0.0;
samples_per_code = 0; samples_per_code = 0.0;
bit_transition_flag = false; bit_transition_flag = false;
use_CFAR_algorithm_flag = false; use_CFAR_algorithm_flag = false;
dump = false; dump = false;

4
src/algorithms/acquisition/libs/acq_conf.h
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@ -46,8 +46,8 @@ public:
unsigned int num_doppler_bins_step2; unsigned int num_doppler_bins_step2;
float doppler_step2; float doppler_step2;
long fs_in; long fs_in;
int samples_per_ms; float samples_per_ms;
int samples_per_code; float samples_per_code;
bool bit_transition_flag; bool bit_transition_flag;
bool use_CFAR_algorithm_flag; bool use_CFAR_algorithm_flag;
bool dump; bool dump;