mirrors/gnss-sdr
1
0
Fork 0
mirror of https://github.com/gnss-sdr/gnss-sdr synced 2024-12-14 12:10:34 +00:00
Code Issues Releases Wiki Activity

Use cpu_multicorrelator_real_codes

Browse Source 
For galileo_e1_dll_pll_veml_tracking_cc and gps_l1_ca_dll_pll_tracking_cc

Note this gives some significant performance improvement for higher
sampling rates
This commit is contained in:
Cillian O'Driscoll 2017-09-11 15:22:32 +01:00
parent e87522880e
commit 9ec5558143
4 changed files with 13 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/algorithms/tracking/gnuradio_blocks/galileo_e1_dll_pll_veml_tracking_cc.cc
View File

@ -11,7 +11,7 @@
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2015 (see AUTHORS file for a list of contributors)
* Copyright (C) 2010-2017 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
@ -129,7 +129,7 @@ galileo_e1_dll_pll_veml_tracking_cc::galileo_e1_dll_pll_veml_tracking_cc(
// Initialization of local code replica
// Get space for a vector with the sinboc(1,1) replica sampled 2x/chip
d_ca_code = static_cast<gr_complex*>(volk_gnsssdr_malloc((2 * Galileo_E1_B_CODE_LENGTH_CHIPS) * sizeof(gr_complex), volk_gnsssdr_get_alignment()));
d_ca_code = static_cast<float*>(volk_gnsssdr_malloc((2 * Galileo_E1_B_CODE_LENGTH_CHIPS) * sizeof(float), volk_gnsssdr_get_alignment()));
// correlator outputs (scalar)
d_n_correlator_taps = 5; // Very-Early, Early, Prompt, Late, Very-Late
@ -211,7 +211,7 @@ void galileo_e1_dll_pll_veml_tracking_cc::start_tracking()
d_code_loop_filter.initialize(); // initialize the code filter
// generate local reference ALWAYS starting at chip 1 (2 samples per chip)
galileo_e1_code_gen_complex_sampled(d_ca_code,
galileo_e1_code_gen_float_sampled(d_ca_code,
d_acquisition_gnss_synchro->Signal,
false,
d_acquisition_gnss_synchro->PRN,

8
src/algorithms/tracking/gnuradio_blocks/galileo_e1_dll_pll_veml_tracking_cc.h
View File

@ -6,7 +6,7 @@
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2015 (see AUTHORS file for a list of contributors)
* Copyright (C) 2010-2017 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
@ -39,7 +39,7 @@
#include "gnss_synchro.h"
#include "tracking_2nd_DLL_filter.h"
#include "tracking_2nd_PLL_filter.h"
#include "cpu_multicorrelator.h"
#include "cpu_multicorrelator_real_codes.h"
class galileo_e1_dll_pll_veml_tracking_cc;
@ -120,10 +120,10 @@ private:
double d_early_late_spc_chips;
double d_very_early_late_spc_chips;
gr_complex* d_ca_code;
float* d_ca_code;
float* d_local_code_shift_chips;
gr_complex* d_correlator_outs;
cpu_multicorrelator multicorrelator_cpu;
cpu_multicorrelator_real_codes multicorrelator_cpu;
gr_complex *d_Very_Early;
gr_complex *d_Early;

4
src/algorithms/tracking/gnuradio_blocks/gps_l1_ca_dll_pll_tracking_cc.cc
View File

@ -123,7 +123,7 @@ Gps_L1_Ca_Dll_Pll_Tracking_cc::Gps_L1_Ca_Dll_Pll_Tracking_cc(
// Initialization of local code replica
// Get space for a vector with the C/A code replica sampled 1x/chip
d_ca_code = static_cast<gr_complex*>(volk_gnsssdr_malloc(static_cast<int>(GPS_L1_CA_CODE_LENGTH_CHIPS) * sizeof(gr_complex), volk_gnsssdr_get_alignment()));
d_ca_code = static_cast<float*>(volk_gnsssdr_malloc(static_cast<int>(GPS_L1_CA_CODE_LENGTH_CHIPS) * sizeof(float), volk_gnsssdr_get_alignment()));
// correlator outputs (scalar)
d_n_correlator_taps = 3; // Early, Prompt, and Late
@ -233,7 +233,7 @@ void Gps_L1_Ca_Dll_Pll_Tracking_cc::start_tracking()
d_code_loop_filter.initialize(); // initialize the code filter
// generate local reference ALWAYS starting at chip 1 (1 sample per chip)
gps_l1_ca_code_gen_complex(d_ca_code, d_acquisition_gnss_synchro->PRN, 0);
gps_l1_ca_code_gen_float(d_ca_code, d_acquisition_gnss_synchro->PRN, 0);
multicorrelator_cpu.set_local_code_and_taps(static_cast<int>(GPS_L1_CA_CODE_LENGTH_CHIPS), d_ca_code, d_local_code_shift_chips);
for (int n = 0; n < d_n_correlator_taps; n++)

7
src/algorithms/tracking/gnuradio_blocks/gps_l1_ca_dll_pll_tracking_cc.h
View File

@ -3,6 +3,7 @@
* \brief Interface of a code DLL + carrier PLL tracking block
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
* Javier Arribas, 2011. jarribas(at)cttc.es
* Cillian O'Driscoll, 2017. cillian.odriscoll(at)gmail.com
*
* Code DLL + carrier PLL according to the algorithms described in:
* K.Borre, D.M.Akos, N.Bertelsen, P.Rinder, and S.H.Jensen,
@ -44,7 +45,7 @@
#include "gnss_synchro.h"
#include "tracking_2nd_DLL_filter.h"
#include "tracking_2nd_PLL_filter.h"
#include "cpu_multicorrelator.h"
#include "cpu_multicorrelator_real_codes.h"
class Gps_L1_Ca_Dll_Pll_Tracking_cc;
@ -126,10 +127,10 @@ private:
double d_acq_carrier_doppler_hz;
// correlator
int d_n_correlator_taps;
gr_complex* d_ca_code;
float* d_ca_code;
float* d_local_code_shift_chips;
gr_complex* d_correlator_outs;
cpu_multicorrelator multicorrelator_cpu;
cpu_multicorrelator_real_codes multicorrelator_cpu;
// tracking vars