mirrors/gnss-sdr
1
0
Fork 0
mirror of https://github.com/gnss-sdr/gnss-sdr synced 2025-10-31 15:23:04 +00:00
Code Issues Releases Wiki Activity

Added GPS L2 Ephemeris and Clock parameters CNAV frame bit structure

Browse Source 
definitions
This commit is contained in:
Javier
2015-05-20 18:24:53 +02:00
parent 64a81d8c48
commit 61c7ab8eed
7 changed files with 436 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
src/algorithms/tracking/gnuradio_blocks/gps_l2_m_dll_pll_tracking_cc.cc
View File

@@ -300,14 +300,14 @@ void gps_l2_m_dll_pll_tracking_cc::update_local_carrier()
{
float phase_rad, phase_step_rad;
phase_step_rad = static_cast<float>(GPS_TWO_PI) * d_carrier_doppler_hz / static_cast<float>(d_fs_in);
phase_step_rad = static_cast<float>(GPS_L2_TWO_PI) * d_carrier_doppler_hz / static_cast<float>(d_fs_in);
phase_rad = d_rem_carr_phase_rad;
for(int i = 0; i < d_current_prn_length_samples; i++)
{
d_carr_sign[i] = gr_complex(cos(phase_rad), -sin(phase_rad));
phase_rad += phase_step_rad;
}
//d_rem_carr_phase_rad = fmod(phase_rad, GPS_TWO_PI);
//d_rem_carr_phase_rad = fmod(phase_rad, GPS_L2_TWO_PI);
//d_acc_carrier_phase_rad = d_acc_carrier_phase_rad + d_rem_carr_phase_rad;
}
@@ -413,7 +413,7 @@ int gps_l2_m_dll_pll_tracking_cc::general_work (int noutput_items, gr_vector_int
// ################## PLL ##########################################################
// PLL discriminator
carr_error_hz = pll_cloop_two_quadrant_atan(*d_Prompt) / static_cast<float>(GPS_TWO_PI);
carr_error_hz = pll_cloop_two_quadrant_atan(*d_Prompt) / static_cast<float>(GPS_L2_TWO_PI);
// Carrier discriminator filter
carr_error_filt_hz = d_carrier_loop_filter.get_carrier_nco(carr_error_hz);
// New carrier Doppler frequency estimation
@@ -421,10 +421,10 @@ int gps_l2_m_dll_pll_tracking_cc::general_work (int noutput_items, gr_vector_int
// New code Doppler frequency estimation
d_code_freq_chips = GPS_L2_M_CODE_RATE_HZ + ((d_carrier_doppler_hz * GPS_L2_M_CODE_RATE_HZ) / GPS_L2_FREQ_HZ);
//carrier phase accumulator for (K) doppler estimation
d_acc_carrier_phase_rad = d_acc_carrier_phase_rad + GPS_TWO_PI * d_carrier_doppler_hz * GPS_L2_M_PERIOD;
d_acc_carrier_phase_rad = d_acc_carrier_phase_rad + GPS_L2_TWO_PI * d_carrier_doppler_hz * GPS_L2_M_PERIOD;
//remanent carrier phase to prevent overflow in the code NCO
d_rem_carr_phase_rad = d_rem_carr_phase_rad + GPS_TWO_PI * d_carrier_doppler_hz * GPS_L2_M_PERIOD;
d_rem_carr_phase_rad = fmod(d_rem_carr_phase_rad, GPS_TWO_PI);
d_rem_carr_phase_rad = d_rem_carr_phase_rad + GPS_L2_TWO_PI * d_carrier_doppler_hz * GPS_L2_M_PERIOD;
d_rem_carr_phase_rad = fmod(d_rem_carr_phase_rad, GPS_L2_TWO_PI);
// ################## DLL ##########################################################
// DLL discriminator

1
src/algorithms/tracking/gnuradio_blocks/gps_l2_m_dll_pll_tracking_cc.h
View File

@@ -45,7 +45,6 @@
#include <gnuradio/block.h>
#include <gnuradio/msg_queue.h>
#include "concurrent_queue.h"
#include "gps_sdr_signal_processing.h"
#include "gnss_synchro.h"
#include "tracking_2nd_DLL_filter.h"
#include "tracking_2nd_PLL_filter.h"