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changed the downsampling factor of the L1 and E1 acquisition from /2 to /4

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This commit is contained in:
Marc Majoral
2018-10-17 15:45:08 +02:00
parent 8710ba1cf7
commit 8e6370e133
5 changed files with 195 additions and 8 deletions
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2
src/algorithms/acquisition/adapters/galileo_e1_pcps_ambiguous_acquisition_fpga.cc
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@@ -59,7 +59,7 @@ GalileoE1PcpsAmbiguousAcquisitionFpga::GalileoE1PcpsAmbiguousAcquisitionFpga(
long fs_in_deprecated = configuration_->property("GNSS-SDR.internal_fs_hz", 4000000);
long fs_in = configuration_->property("GNSS-SDR.internal_fs_sps", fs_in_deprecated);
float downsampling_factor = configuration_->property("GNSS-SDR.downsampling_factor", 2.0);
float downsampling_factor = configuration_->property("GNSS-SDR.downsampling_factor", 4.0);
acq_parameters.downsampling_factor = downsampling_factor;
//fs_in = fs_in/2.0; // downampling filter

2
src/algorithms/acquisition/adapters/gps_l1_ca_pcps_acquisition_fpga.cc
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@@ -61,7 +61,7 @@ GpsL1CaPcpsAcquisitionFpga::GpsL1CaPcpsAcquisitionFpga(
long fs_in_deprecated = configuration_->property("GNSS-SDR.internal_fs_hz", 2048000);
long fs_in = configuration_->property("GNSS-SDR.internal_fs_sps", fs_in_deprecated);
float downsampling_factor = configuration_->property("GNSS-SDR.downsampling_factor", 2.0);
float downsampling_factor = configuration_->property("GNSS-SDR.downsampling_factor", 4.0);
acq_parameters.downsampling_factor = downsampling_factor;
//fs_in = fs_in/2.0; // downampling filter
//printf("fs_in pre downsampling = %ld\n", fs_in);

5
src/algorithms/acquisition/gnuradio_blocks/pcps_acquisition_fpga.cc
View File

@@ -326,7 +326,9 @@ void pcps_acquisition_fpga::set_active(bool active)
{
//printf("yes here\n");
d_gnss_synchro->Acq_delay_samples = static_cast<double>(d_downsampling_factor*(indext % acq_parameters.samples_per_code));
d_gnss_synchro->Acq_samplestamp_samples = d_downsampling_factor*d_sample_counter - 81*0.25*d_downsampling_factor; // delay due to the downsampling filter in the acquisition
//d_gnss_synchro->Acq_samplestamp_samples = d_downsampling_factor*d_sample_counter - 81*0.25*d_downsampling_factor; // delay due to the downsampling filter in the acquisition
d_gnss_synchro->Acq_samplestamp_samples = d_downsampling_factor*d_sample_counter - 81*0.5; // delay due to the downsampling filter in the acquisition
//d_gnss_synchro->Acq_samplestamp_samples = d_downsampling_factor*d_sample_counter - 81/d_downsampling_factor; // delay due to the downsampling filter in the acquisition
//d_gnss_synchro->Acq_delay_samples = static_cast<double>(2*(indext % acq_parameters.samples_per_code));
//d_gnss_synchro->Acq_delay_samples = static_cast<double>(2*(indext));
//d_gnss_synchro->Acq_samplestamp_samples = d_sample_counter*2 - 81;
@@ -335,6 +337,7 @@ void pcps_acquisition_fpga::set_active(bool active)
}
else
{
//printf("xxxxxxxxxxxxxxxx no here\n");
d_gnss_synchro->Acq_delay_samples = static_cast<double>(indext % acq_parameters.samples_per_code);
d_gnss_synchro->Acq_samplestamp_samples = d_sample_counter; // delay due to the downsampling filter in the acquisition
//d_gnss_synchro->Acq_samplestamp_samples = d_sample_counter - 40; // delay due to the downsampling filter in the acquisition