gnss-sdr/src/algorithms/tracking/gnuradio_blocks/gps_l1_ca_dll_pll_tracking_...

216 lines
6.2 KiB
C++

/*!
* \file gps_l1_ca_dll_pll_tracking_cc.h
* \brief code DLL + carrier PLL
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
* Javier Arribas, 2011. jarribas(at)cttc.es
*
* Code DLL + carrier PLL according to the algorithms described in [1]
* [1] K.Borre, D.M.Akos, N.Bertelsen, P.Rinder, and S.H.Jensen,
* A Software-Defined GPS and Galileo Receiver. A Single-Frequency Approach, Birkha user, 2007
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2011 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#ifndef GPS_L1_CA_DLL_PLL_TRACKING_CC_H
#define GPS_L1_CA_DLL_PLL_TRACKING_CC_H
#include <fstream>
#include <gnuradio/gr_block.h>
#include <gnuradio/gr_msg_queue.h>
//#include <gnuradio/gr_sync_decimator.h>
#include "gps_sdr_signal_processing.h"
#include <queue>
#include <boost/thread/mutex.hpp>
#include <boost/thread/thread.hpp>
#include "concurrent_queue.h"
// #include "gps_sdr_structs.h"
// #include "gps_sdr_channel.h"
class gps_l1_ca_dll_pll_tracking_cc;
typedef boost::shared_ptr<gps_l1_ca_dll_pll_tracking_cc>
gps_l1_ca_dll_pll_tracking_cc_sptr;
gps_l1_ca_dll_pll_tracking_cc_sptr
gps_l1_ca_dll_pll_make_tracking_cc(unsigned int satellite, long if_freq,
long fs_in, unsigned
int vector_length,
gr_msg_queue_sptr queue, bool dump);
//class gps_l1_ca_dll_pll_tracking_cc: public gr_sync_decimator
class gps_l1_ca_dll_pll_tracking_cc: public gr_block
{
private:
friend gps_l1_ca_dll_pll_tracking_cc_sptr
gps_l1_ca_dll_pll_make_tracking_cc(unsigned int satellite, long if_freq,
long fs_in, unsigned
int vector_length,
gr_msg_queue_sptr queue, bool dump);
gps_l1_ca_dll_pll_tracking_cc(unsigned int satellite, long if_freq,
long fs_in, unsigned
int vector_length, gr_msg_queue_sptr queue,
bool dump);
void calculate_lopp_coef(float* tau1, float* tau2, float lbw, float zeta,
float k);
void update_local_code_refs();
void update_local_carrier();
// class private vars
gr_msg_queue_sptr d_queue;
concurrent_queue<int> *d_channel_internal_queue;
unsigned int d_vector_length;
bool d_dump;
unsigned int d_satellite;
unsigned int d_channel; //?
int d_last_seg;
long d_if_freq;
long d_fs_in;
float d_tau1_code;
float d_tau2_code;
float d_tau1_carr;
float d_tau2_carr;
float d_early_late_spc;
float d_pdi_code;
float d_pdi_carr;
float d_dllnoisebandwidth;
float d_dlldampingratio;
float d_pllnoisebandwidth;
float d_plldampingratio;
unsigned int d_code_length;
unsigned int d_blk_size;
float d_code_phase_step;
gr_complex* d_ca_code;
gr_complex* d_early_code;
gr_complex* d_late_code;
gr_complex* d_prompt_code;
gr_complex* d_carr_sign;
gr_complex* d_bb_sign;
float d_code_freq;
float d_rem_code_phase;
float d_rem_carr_phase;
float d_old_code_nco;
float d_old_code_error;
float d_old_carr_nco;
float d_old_carr_error;
float d_code_phase;
float d_carrier_doppler;
float d_carr_freq_basis;
//std::complex<double> d_E;
//std::complex<double> d_P;
//std::complex<double> d_L;
float d_E_I;
float d_E_Q;
float d_P_I;
float d_P_Q;
float d_L_I;
float d_L_Q;
float d_absolute_code_phase_samples;
float d_code_phase_ms;
unsigned int d_blksize;
unsigned long int d_sample_counter;
unsigned long int d_acq_sample_stamp;
unsigned long int d_loops_count;
// CN0 estimation and lock detector
int d_cn0_estimation_counter;
float* d_P_I_buffer;
float* d_P_Q_buffer;
float d_carrier_lock_test;
float d_SNR_SNV;
float d_SNR_MM;
float d_SNR_SNV_dB_Hz;
float d_carrier_lock_threshold;
int d_carrier_lock_fail_counter;
bool d_enable_tracking;
bool d_pull_in;
std::string d_dump_filename;
std::ofstream d_dump_file;
public:
~gps_l1_ca_dll_pll_tracking_cc();
void set_satellite(unsigned int satellite);
void set_channel(unsigned int channel);
void set_acq_code_phase(float code_phase);
void set_acq_doppler(float doppler);
void start_tracking();
void set_acq_sample_stamp(unsigned long int sample_stamp)
{
d_acq_sample_stamp = sample_stamp;
}
void set_channel_queue(concurrent_queue<int> *channel_internal_queue)
{
d_channel_internal_queue = channel_internal_queue;
}
/*!
* \brief just like gr_block::general_work, only this arranges to call consume_each for you
*
* The user must override work to define the signal processing code
*/
//virtual int work (int noutput_items,
// gr_vector_const_void_star &input_items,
// gr_vector_void_star &output_items) = 0;
//int work(int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items);
int general_work (int noutput_items, gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items, gr_vector_void_star &output_items);
void forecast (int noutput_items, gr_vector_int &ninput_items_required);
};
#endif //GPS_L1_CA_DLL_PLL_TRACKING_CC_H