mirror of
https://github.com/gnss-sdr/gnss-sdr
synced 2024-12-15 12:40:35 +00:00
Added PCPS based Acquisition Files
This commit is contained in:
piyush0411
parent
8c965bb4f3
commit
9e38cc4ef5
@ -0,0 +1,247 @@
|
||||
/*!
|
||||
* \file galileo_e5b_pcps_acquisition.cc
|
||||
* \brief Adapts a PCPS acquisition block to an AcquisitionInterface for
|
||||
* Galileo E5b data and pilot Signals
|
||||
* \author Piyush Gupta, 2020. piyush04111999@gmail.com
|
||||
* \note Code added as part of GSoC 2020 program.
|
||||
*
|
||||
* -------------------------------------------------------------------------
|
||||
*
|
||||
* Copyright (C) 2010-2020 (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.
|
||||
*
|
||||
* SPDX-License-Identifier: GPL-3.0-or-later
|
||||
*
|
||||
* -------------------------------------------------------------------------
|
||||
*/
|
||||
|
||||
#include "galileo_e5b_pcps_acquisition.h"
|
||||
#include "Galileo_E5b.h"
|
||||
#include "acq_conf.h"
|
||||
#include "configuration_interface.h"
|
||||
#include "galileo_e5_signal_processing.h"
|
||||
#include "gnss_sdr_flags.h"
|
||||
#include <glog/logging.h>
|
||||
#include <volk_gnsssdr/volk_gnsssdr_complex.h>
|
||||
#include <algorithm>
|
||||
|
||||
#if HAS_STD_SPAN
|
||||
#include <span>
|
||||
namespace own = std;
|
||||
#else
|
||||
#include <gsl/gsl>
|
||||
namespace own = gsl;
|
||||
#endif
|
||||
|
||||
GalileoE5bPcpsAcquisition::GalileoE5bPcpsAcquisition(ConfigurationInterface* configuration,
|
||||
const std::string& role,
|
||||
unsigned int in_streams,
|
||||
unsigned int out_streams) : role_(role),
|
||||
in_streams_(in_streams),
|
||||
out_streams_(out_streams)
|
||||
{
|
||||
configuration_ = configuration;
|
||||
acq_parameters_.ms_per_code = 1;
|
||||
acq_parameters_.SetFromConfiguration(configuration_, role, GALILEO_E5B_CODE_CHIP_RATE_CPS, GALILEO_E5B_OPT_ACQ_FS_SPS);
|
||||
|
||||
DLOG(INFO) << "Role " << role;
|
||||
|
||||
if (FLAGS_doppler_max != 0)
|
||||
{
|
||||
acq_parameters_.doppler_max = FLAGS_doppler_max;
|
||||
}
|
||||
doppler_max_ = acq_parameters_.doppler_max;
|
||||
doppler_step_ = acq_parameters_.doppler_step;
|
||||
item_type_ = acq_parameters_.item_type;
|
||||
item_size_ = acq_parameters_.it_size;
|
||||
fs_in_ = acq_parameters_.fs_in;
|
||||
|
||||
acq_pilot_ = configuration_->property(role + ".acquire_pilot", false);
|
||||
acq_iq_ = configuration_->property(role + ".acquire_iq", false);
|
||||
if (acq_iq_)
|
||||
{
|
||||
acq_pilot_ = false;
|
||||
}
|
||||
|
||||
code_length_ = static_cast<unsigned int>(std::floor(static_cast<double>(acq_parameters_.resampled_fs) / (GALILEO_E5B_CODE_CHIP_RATE_CPS / GALILEO_E5B_CODE_LENGTH_CHIPS)));
|
||||
vector_length_ = std::floor(acq_parameters_.sampled_ms * acq_parameters_.samples_per_ms) * (acq_parameters_.bit_transition_flag ? 2 : 1);
|
||||
code_ = std::vector<std::complex<float>>(vector_length_);
|
||||
|
||||
sampled_ms_ = acq_parameters_.sampled_ms;
|
||||
|
||||
acquisition_ = pcps_make_acquisition(acq_parameters_);
|
||||
DLOG(INFO) << "acquisition(" << acquisition_->unique_id() << ")";
|
||||
|
||||
|
||||
channel_ = 0;
|
||||
threshold_ = 0.0;
|
||||
doppler_center_ = 0;
|
||||
gnss_synchro_ = nullptr;
|
||||
|
||||
if (in_streams_ > 1)
|
||||
{
|
||||
LOG(ERROR) << "This implementation only supports one input stream";
|
||||
}
|
||||
if (out_streams_ > 0)
|
||||
{
|
||||
LOG(ERROR) << "This implementation does not provide an output stream";
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void GalileoE5bPcpsAcquisition::stop_acquisition()
|
||||
{
|
||||
}
|
||||
|
||||
|
||||
void GalileoE5bPcpsAcquisition::set_threshold(float threshold)
|
||||
{
|
||||
threshold_ = threshold;
|
||||
acquisition_->set_threshold(threshold_);
|
||||
}
|
||||
|
||||
|
||||
void GalileoE5bPcpsAcquisition::set_doppler_max(unsigned int doppler_max)
|
||||
{
|
||||
doppler_max_ = doppler_max;
|
||||
acquisition_->set_doppler_max(doppler_max_);
|
||||
}
|
||||
|
||||
|
||||
void GalileoE5bPcpsAcquisition::set_doppler_step(unsigned int doppler_step)
|
||||
{
|
||||
doppler_step_ = doppler_step;
|
||||
acquisition_->set_doppler_step(doppler_step_);
|
||||
}
|
||||
|
||||
|
||||
void GalileoE5bPcpsAcquisition::set_doppler_center(int doppler_center)
|
||||
{
|
||||
doppler_center_ = doppler_center;
|
||||
acquisition_->set_doppler_center(doppler_center_);
|
||||
}
|
||||
|
||||
|
||||
void GalileoE5bPcpsAcquisition::set_gnss_synchro(Gnss_Synchro* gnss_synchro)
|
||||
{
|
||||
gnss_synchro_ = gnss_synchro;
|
||||
acquisition_->set_gnss_synchro(gnss_synchro_);
|
||||
}
|
||||
|
||||
|
||||
signed int GalileoE5bPcpsAcquisition::mag()
|
||||
{
|
||||
return acquisition_->mag();
|
||||
}
|
||||
|
||||
|
||||
void GalileoE5bPcpsAcquisition::init()
|
||||
{
|
||||
acquisition_->init();
|
||||
}
|
||||
|
||||
|
||||
void GalileoE5bPcpsAcquisition::set_local_code()
|
||||
{
|
||||
std::vector<std::complex<float>> code(code_length_);
|
||||
std::array<char, 3> signal_{};
|
||||
signal_[0] = '7';
|
||||
signal_[2] = '\0';
|
||||
|
||||
if (acq_iq_)
|
||||
{
|
||||
signal_[1] = 'X';
|
||||
}
|
||||
else if (acq_pilot_)
|
||||
{
|
||||
signal_[1] = 'Q';
|
||||
}
|
||||
else
|
||||
{
|
||||
signal_[1] = 'I';
|
||||
}
|
||||
|
||||
if (acq_parameters_.use_automatic_resampler)
|
||||
{
|
||||
galileo_e5_b_code_gen_complex_sampled(code, gnss_synchro_->PRN, signal_, acq_parameters_.resampled_fs, 0);
|
||||
}
|
||||
else
|
||||
{
|
||||
galileo_e5_b_code_gen_complex_sampled(code, gnss_synchro_->PRN, signal_, fs_in_, 0);
|
||||
}
|
||||
own::span<gr_complex> code_span(code_.data(), vector_length_);
|
||||
for (unsigned int i = 0; i < sampled_ms_; i++)
|
||||
{
|
||||
std::copy_n(code.data(), code_length_, code_span.subspan(i * code_length_, code_length_).data());
|
||||
}
|
||||
|
||||
acquisition_->set_local_code(code_.data());
|
||||
}
|
||||
|
||||
|
||||
void GalileoE5bPcpsAcquisition::reset()
|
||||
{
|
||||
acquisition_->set_active(true);
|
||||
}
|
||||
|
||||
|
||||
void GalileoE5bPcpsAcquisition::set_state(int state)
|
||||
{
|
||||
acquisition_->set_state(state);
|
||||
}
|
||||
|
||||
|
||||
void GalileoE5bPcpsAcquisition::connect(gr::top_block_sptr top_block __attribute__((unused)))
|
||||
{
|
||||
if (item_type_ == "gr_complex")
|
||||
{
|
||||
// nothing to connect
|
||||
}
|
||||
else if (item_type_ == "cshort")
|
||||
{
|
||||
// nothing to connect
|
||||
}
|
||||
else
|
||||
{
|
||||
LOG(WARNING) << item_type_ << " unknown acquisition item type";
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void GalileoE5bPcpsAcquisition::disconnect(gr::top_block_sptr top_block __attribute__((unused)))
|
||||
{
|
||||
if (item_type_ == "gr_complex")
|
||||
{
|
||||
// nothing to disconnect
|
||||
}
|
||||
else if (item_type_ == "cshort")
|
||||
{
|
||||
// nothing to disconnect
|
||||
}
|
||||
else
|
||||
{
|
||||
LOG(WARNING) << item_type_ << " unknown acquisition item type";
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
gr::basic_block_sptr GalileoE5bPcpsAcquisition::get_left_block()
|
||||
{
|
||||
return acquisition_;
|
||||
}
|
||||
|
||||
|
||||
gr::basic_block_sptr GalileoE5bPcpsAcquisition::get_right_block()
|
||||
{
|
||||
return acquisition_;
|
||||
}
|
||||
|
||||
|
||||
void GalileoE5bPcpsAcquisition::set_resampler_latency(uint32_t latency_samples)
|
||||
{
|
||||
acquisition_->set_resampler_latency(latency_samples);
|
||||
}
|
||||
@ -0,0 +1,204 @@
|
||||
/*!
|
||||
* \file galileo_e5b_pcps_acquisition.h
|
||||
* \brief Adapts a PCPS acquisition block to an AcquisitionInterface for
|
||||
* Galileo E5b data and pilot Signals
|
||||
* \author Piyush Gupta, 2020. piyush04111999@gmail.com
|
||||
* \note Code added as part of GSoC 2020 program.
|
||||
|
||||
* -------------------------------------------------------------------------
|
||||
*
|
||||
* Copyright (C) 2010-2020 (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.
|
||||
*
|
||||
* SPDX-License-Identifier: GPL-3.0-or-later
|
||||
*
|
||||
* -------------------------------------------------------------------------
|
||||
*/
|
||||
|
||||
#ifndef GNSS_SDR_GALILEO_E5B_PCPS_ACQUISITION_H
|
||||
#define GNSS_SDR_GALILEO_E5B_PCPS_ACQUISITION_H
|
||||
|
||||
|
||||
#include "channel_fsm.h"
|
||||
#include "gnss_synchro.h"
|
||||
#include "pcps_acquisition.h"
|
||||
#include <memory>
|
||||
#include <string>
|
||||
#include <vector>
|
||||
|
||||
class ConfigurationInterface;
|
||||
|
||||
class GalileoE5bPcpsAcquisition : public AcquisitionInterface
|
||||
{
|
||||
public:
|
||||
/*!
|
||||
* \brief Constructor
|
||||
*/
|
||||
GalileoE5bPcpsAcquisition(ConfigurationInterface* configuration,
|
||||
const std::string& role,
|
||||
unsigned int in_streams,
|
||||
unsigned int out_streams);
|
||||
|
||||
/*!
|
||||
* \brief Destructor
|
||||
*/
|
||||
~GalileoE5bPcpsAcquisition() = default;
|
||||
|
||||
/*!
|
||||
* \brief Role
|
||||
*/
|
||||
inline std::string role() override
|
||||
{
|
||||
return role_;
|
||||
}
|
||||
|
||||
/*!
|
||||
* \brief Returns "GALILEO_E5b_PCPS_Acquisition"
|
||||
*/
|
||||
|
||||
inline std::string implementation() override
|
||||
{
|
||||
return "Galileo_E5b_PCPS_Acquisition";
|
||||
}
|
||||
|
||||
/*!
|
||||
* \brief Returns size of lv_16sc_t
|
||||
*/
|
||||
inline size_t item_size() override
|
||||
{
|
||||
return sizeof(int16_t);
|
||||
}
|
||||
|
||||
/*!
|
||||
* \brief Connect
|
||||
*/
|
||||
void connect(gr::top_block_sptr top_block) override;
|
||||
|
||||
/*!
|
||||
* \brief Disconnect
|
||||
*/
|
||||
void disconnect(gr::top_block_sptr top_block) override;
|
||||
|
||||
/*!
|
||||
* \brief Get left block
|
||||
*/
|
||||
gr::basic_block_sptr get_left_block() override;
|
||||
|
||||
/*!
|
||||
* \brief Get right block
|
||||
*/
|
||||
gr::basic_block_sptr get_right_block() override;
|
||||
|
||||
/*!
|
||||
* \brief Set acquisition/tracking common Gnss_Synchro object pointer
|
||||
* to efficiently exchange synchronization data between acquisition and
|
||||
* tracking blocks
|
||||
*/
|
||||
void set_gnss_synchro(Gnss_Synchro* p_gnss_synchro) override;
|
||||
|
||||
/*!
|
||||
* \brief Set acquisition channel unique ID
|
||||
*/
|
||||
inline void set_channel(unsigned int channel) override
|
||||
{
|
||||
channel_ = channel;
|
||||
acquisition_->set_channel(channel_);
|
||||
}
|
||||
|
||||
/*!
|
||||
* \brief Set channel fsm associated to this acquisition instance
|
||||
*/
|
||||
inline void set_channel_fsm(std::weak_ptr<ChannelFsm> channel_fsm) override
|
||||
{
|
||||
channel_fsm_ = channel_fsm;
|
||||
acquisition_->set_channel_fsm(channel_fsm);
|
||||
}
|
||||
|
||||
/*!
|
||||
* \brief Set statistics threshold of PCPS algorithm
|
||||
*/
|
||||
void set_threshold(float threshold) override;
|
||||
|
||||
/*!
|
||||
* \brief Set maximum Doppler off grid search
|
||||
*/
|
||||
void set_doppler_max(unsigned int doppler_max) override;
|
||||
|
||||
/*!
|
||||
* \brief Set Doppler steps for the grid search
|
||||
*/
|
||||
void set_doppler_step(unsigned int doppler_step) override;
|
||||
|
||||
/*!
|
||||
* \brief Set Doppler center for the grid search
|
||||
*/
|
||||
void set_doppler_center(int doppler_center) override;
|
||||
|
||||
/*!
|
||||
* \brief Initializes acquisition algorithm.
|
||||
*/
|
||||
void init() override;
|
||||
|
||||
/*!
|
||||
* \brief Sets local Galileo E5b code for PCPS acquisition algorithm.
|
||||
*/
|
||||
void set_local_code() override;
|
||||
|
||||
/*!
|
||||
* \brief Returns the maximum peak of grid search
|
||||
*/
|
||||
signed int mag() override;
|
||||
|
||||
/*!
|
||||
* \brief Restart acquisition algorithm
|
||||
*/
|
||||
void reset() override;
|
||||
|
||||
/*!
|
||||
* \brief If set to 1, ensures that acquisition starts at the
|
||||
* first available sample.
|
||||
* \param state - int=1 forces start of acquisition
|
||||
*/
|
||||
void set_state(int state) override;
|
||||
|
||||
/*!
|
||||
* \brief Stop running acquisition
|
||||
*/
|
||||
void stop_acquisition() override;
|
||||
|
||||
/*!
|
||||
* \brief Sets the resampler latency to account it in the acquisition code delay estimation
|
||||
*/
|
||||
void set_resampler_latency(uint32_t latency_samples) override;
|
||||
|
||||
private:
|
||||
ConfigurationInterface* configuration_;
|
||||
pcps_acquisition_sptr acquisition_;
|
||||
Acq_Conf acq_parameters_;
|
||||
size_t item_size_;
|
||||
std::string item_type_;
|
||||
std::string dump_filename_;
|
||||
std::string role_;
|
||||
bool acq_pilot_;
|
||||
bool acq_iq_;
|
||||
unsigned int vector_length_;
|
||||
unsigned int code_length_;
|
||||
unsigned int channel_;
|
||||
std::weak_ptr<ChannelFsm> channel_fsm_;
|
||||
unsigned int doppler_max_;
|
||||
unsigned int doppler_step_;
|
||||
int doppler_center_;
|
||||
unsigned int sampled_ms_;
|
||||
unsigned int in_streams_;
|
||||
unsigned int out_streams_;
|
||||
int64_t fs_in_;
|
||||
float threshold_;
|
||||
std::vector<std::complex<float>> code_;
|
||||
Gnss_Synchro* gnss_synchro_;
|
||||
};
|
||||
|
||||
#endif // GNSS_SDR_GALILEO_E5B_PCPS_ACQUISITION_H
|
||||
Loading…
Reference in New Issue
Block a user