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into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

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How to set up the compilation environment for Ubuntu 9.10 and 10.04
- Download GNU Radio 3.3.0 from ftp://ftp.gnu.org/gnu/gnuradio
- Compile and install following the instructions at http://gnuradio.org/redmine/wiki/1/UbuntuInstall
- Install bjam with the command 'sudo apt-get install bjam'
- Install Boost.Build with the command 'sudo apt-get install boost-build'
- Add the system variable GNURADIO_330_ROOT with the location of the sources of gnuradio-3.3.0
- Download gtest-1.4.0.tar.gz from http://code.google.com/p/googletest.
- Unpack gtest-1.4.0.tar.gz into some folder.
- From the folder containing gtest build the libraries and install them:
- GTEST$ ./configure
- GTEST$ make
- GTEST$ make check
- GTEST$ sudo make install
- Add the following line to your .bashrc:
- export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/usr/local/lib
- Download glog-0.3.0.tar.gz from http://code.google.com/p/google-glog.
- Unpack glog-0.3.0.tar.gz into some folder.
- From the folder containing glog, build and install the libraries:
- GLOG$ ./configure
- GLOG$ make
- GLOG$ sudo make install
NOTE: THE LOG FILES ARE STORED BY DEFAULT /TMP/
- Download gflags-1.3.tar.gz from http://code.google.com/p/google-gflags.
- Unpack gflags-1.3.tar.gz into some folder.
- From the folder containing gflags, build the libraries and install them:
- GFLAGS$ ./configure
- GFLAGS$ make
- GFLAGS$ sudo make install
(11/12/2010) GSL AND CBLAS ARITHMETIC
In order to compile the arithmetic tests, the GNU Scientific Library (GSL) library package is needed.
Install the ubuntu package with:
sudo apt-get install libgsl0ldbl
To build the project type call bjam from the project root folder.
PROFILING
In order to do profiling, you'll have to install google-perftools library.
- Download google-perftools-1.5.tar.gz from http://code.google.com/p/google-perftools.
- Unpack google-perftools-1.5.tar.gz into some folder.
- From the folder containing google-perftools, build and install the libraries:
- PERFTOOLS$ ./configure
- PERFTOOLS$ make
- PERFTOOLS$ sudo make install
Once google-perftools is installed, you can use the script "profiler" which is placed
in the root folder of MERCURIO sources. The script must be run as root since it makes use
of "nice". The result of the profiling are two files, mercurio.cpu.prof and mercurio.head.prof.0001.heap,
that contain the results for CPU and HEAP profiling. You can use google-perftools' script pprof
to analyze the recorded data.
(Sample of .bashrc configuration)
export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/usr/local/lib
export GNURADIO_330_ROOT=/home/gnss/sdr/gnuradio-3.3.0

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; Sample for a configuration file for MERCURIO
[mercurio]
;######### CONTROL_THREAD CONFIG ############
ControlThread.wait_for_flowgraph=false
;######### SIGNAL_SOURCE CONFIG ############
SignalSource.implementation=File_Signal_Source
;SignalSource.filename=/media/My Passport/spirent scenario 2/data/sc2_d8.dat
;SignalSource.filename=/home/luis/Project/signals/GPS_cap1.dat
SignalSource.filename=/media/My Passport/KINGSTON (G)/Project Luis/GPSL1_Fs_8MHz_ID_1_CN0_60.dat
SignalSource.item_type=gr_complex
SignalSource.sampling_frequency=8000000
SignalSource.samples=0
SignalSource.repeat=false
SignalSource.dump=false
SignalSource.enable_throttle_control=true
;######### SIGNAL_CONDITIONER CONFIG ############
SignalConditioner.implementation=Pass_Through
SignalConditioner.item_type=gr_complex
SignalConditioner.sample_freq_in=8000000
SignalConditioner.sample_freq_out=8000000
SignalConditioner.dump=false
;######### CHANNELS CONFIGURATION CONFIG ############
Channels.count=1
;######### ACQUISITION CONFIG ############
Acquisition.dump=false
Acquisition.dump_filename=./acq_dump.dat
Acquisition.item_type=gr_complex
Acquisition.fs_in=8000000
Acquisition.if=0
Acquisition.sampled_ms=1
;######### ACQUISITION 0 CONFIG ############
Acquisition0.implementation=GPS_L1_CA_PCPS_Acquisition
Acquisition0.threshold=0.006
Acquisition0.doppler_max=10000
Acquisition0.doppler_step=250
Acquisition0.satellite=1
Acquisition0.repeat_satellite=true
;######### ACQUISITION 1 CONFIG ############
Acquisition1.implementation=GPS_L1_CA_GPS_SDR_Acquisition
Acquisition1.threshold=30
Acquisition1.doppler_max=10000
Acquisition1.doppler_step=250
Acquisition1.satellite=16
Acquisition1.repeat_satellite=true
;######### ACQUISITION 2 CONFIG ############
Acquisition2.implementation=GPS_L1_CA_TONG_PCPS_Acquisition
Acquisition2.threshold=
Acquisition2.doppler_max=10000
Acquisition2.doppler_step=250
Acquisition2.satellite=21
Acquisition2.repeat_satellite=true
;######### ACQUISITION 3 CONFIG ############
Acquisition3.implementation=GPS_L1_CA_PCPS_Acquisition
Acquisition3.threshold=105000
;######### TRACKING CONFIG ############
Tracking.implementation=GPS_L1_CA_DLL_PLL_Tracking
Tracking.item_type=gr_complex
Tracking.vector_length=8000
Tracking.fs_in=8000000
Tracking.if=0
Tracking.dump=true
Tracking.dump_filename=./trk_dump.dat
;######### TELEMETRY DECODER CONFIG ############
TelemetryDecoder.implementation=GPS_L1_CA_Telemetry_Decoder
TelemetryDecoder.item_type=gr_complex
;######### OBSERVABLES CONFIG ############
Observables.implementation=GPS_L1_CA_Observables
Observables.fs_in=8000000;
;######### PVT CONFIG ############
PVT.implementation=Pass_Through
PVT.item_type=gr_complex
;######### OUTPUT_FILTER CONFIG ############
OutputFilter.implementation=Null_Sink_Output_Filter
OutputFilter.filename=data/mercurio.dat
OutputFilter.item_type=gr_complex

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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<profiles version="1">
<profile kind="CodeFormatterProfile" name="GNSS-SDR" version="1">
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<setting id="org.eclipse.cdt.core.formatter.insert_new_line_in_empty_block" value="insert"/>
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</profiles>

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import testing ;
lib gtest ;
lib glog ;
lib gflags ;
lib gnuradio-core ;
lib gnuradio-usrp ;
lib profiler ;
lib gsl ;
lib gslcblas ;
project : requirements
<define>OMNITHREAD_POSIX
<cxxflags>"-std=c++0x"
# <include>src/utils
# <include>src/utils/INIReader
<include>src/algorithms/acquisition/adapters
<include>src/algorithms/acquisition/gnuradio_blocks
<include>src/algorithms/channel/adapters
<include>src/algorithms/channel/gnuradio_blocks
<include>src/algorithms/channel/libs
<include>src/algorithms/conditioner/adapters
<include>src/algorithms/conditioner/gnuradio_blocks
<include>src/algorithms/libs
<include>src/algorithms/observables/adapters
<include>src/algorithms/observables/gnuradio_blocks
<include>src/algorithms/observables/libs
<include>src/algorithms/output_filter/adapters
<include>src/algorithms/output_filter/gnuradio_blocks
<include>src/algorithms/PVT/adapters
<include>src/algorithms/PVT/gnuradio_blocks
<include>src/algorithms/signal_source/adapters
<include>src/algorithms/signal_source/gnuradio_blocks
<include>src/algorithms/telemetry_decoder/adapters
<include>src/algorithms/telemetry_decoder/gnuradio_blocks
<include>src/algorithms/telemetry_decoder/libs
<include>src/algorithms/tracking/adapters
<include>src/algorithms/tracking/gnuradio_blocks
<include>src/core/interfaces
<include>src/core/libs
<include>src/core/receiver
<include>src/core/system_parameters
<include>$GNURADIO_330_ROOT/gr-usrp/src
<include>$GNURADIO_330_ROOT/gnuradio-core/src/lib/runtime
<include>$GNURADIO_330_ROOT/gnuradio-core/src/lib/filter
<include>$GNURADIO_330_ROOT/gnuradio-core/src/lib/io
<include>$GNURADIO_330_ROOT/gnuradio-core/src/lib/general
<include>$GNURADIO_330_ROOT/gnuradio-core/src/lib/gengen ;
build-project src ;

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/*!
* \file gps_l1_ca_gps_sdr_acquisition.cc
* \brief Brief description of the file here
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
* Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* -------------------------------------------------------------------------
*
* 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/>.
*
* -------------------------------------------------------------------------
*/
#include "gps_l1_ca_gps_sdr_acquisition.h"
#include "configuration_interface.h"
#include <gnuradio/gr_io_signature.h>
#include <gnuradio/gr_stream_to_vector.h>
#include <gnuradio/gr_vector_to_stream.h>
#include <gnuradio/gr_complex_to_interleaved_short.h>
#include <gnuradio/gr_interleaved_short_to_complex.h>
#include <glog/log_severity.h>
#include <glog/logging.h>
using google::LogMessage;
//! Constructor
GpsL1CaGpsSdrAcquisition::GpsL1CaGpsSdrAcquisition(
ConfigurationInterface* configuration, std::string role,
unsigned int in_streams, unsigned int out_streams,
gr_msg_queue_sptr queue) :
role_(role), in_streams_(in_streams), out_streams_(out_streams), queue_(
queue)
{
std::string default_item_type = "gr_complex";
std::string default_dump_filename = "./data/acquisition_";
DLOG(INFO) << "role " << role;
item_type_ = configuration->property(role + ".item_type",
default_item_type);
//vector_length_ = configuration->property(role + ".vector_length", 2048);
satellite_ = 0;
fs_in_ = configuration->property(role + ".fs_in", 2048000);
if_ = configuration->property(role + ".ifreq", 0);
dump_ = configuration->property(role + ".dump", false);
doppler_max_ = 0;
acquisition_ms_ = configuration->property(role + ".sampled_ms", 1);
dump_filename_ = configuration->property(role + ".dump_filename",
default_dump_filename);
//vector_length_=ceil((float)fs_in_*((float)acquisition_ms_/1000));
//--- Find number of samples per spreading code ----------------------------
const int32 _codeFreqBasis = 1023000; //Hz
const int32 _codeLength = 1023;
vector_length_ = round(fs_in_ / (_codeFreqBasis / _codeLength));
printf("vector_length_ %i\n\r", vector_length_);
if (item_type_.compare("short") == 0)
{
item_size_ = sizeof(short);
acquisition_ss_ = gps_l1_ca_gps_sdr_make_acquisition_ss(
acquisition_ms_, if_, fs_in_, vector_length_, queue_, dump_,
dump_filename_);
stream_to_vector_ = gr_make_stream_to_vector(item_size_, 2
* vector_length_);
}
else if (item_type_.compare("gr_complex") == 0)
{
item_size_ = sizeof(gr_complex);
acquisition_cc_ = gps_l1_ca_gps_sdr_make_acquisition_cc(
acquisition_ms_, if_, fs_in_, vector_length_, queue_, dump_,
dump_filename_);
stream_to_vector_ = gr_make_stream_to_vector(item_size_,
vector_length_);
}
else
{
LOG_AT_LEVEL(WARNING) << item_type_ << " unknown item type.";
}
DLOG(INFO) << "stream_to_vector(" << stream_to_vector_->unique_id()
<< ")";
}
//! Destructor
GpsL1CaGpsSdrAcquisition::~GpsL1CaGpsSdrAcquisition()
{}
//! Set satellite
void GpsL1CaGpsSdrAcquisition::set_satellite(unsigned int satellite)
{
satellite_ = satellite;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_satellite(satellite_);
}
else
{
acquisition_ss_->set_satellite(satellite_);
}
}
//! Set channel
void GpsL1CaGpsSdrAcquisition::set_channel(unsigned int channel)
{
channel_ = channel;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_channel(channel_);
}
else
{
acquisition_ss_->set_channel(channel_);
}
}
//! Set acquisition threshold
void GpsL1CaGpsSdrAcquisition::set_threshold(float threshold)
{
threshold_ = threshold;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_threshold(threshold_);
}
else
{
acquisition_ss_->set_threshold(threshold_);
}
}
//! Set maximum Doppler shift
void GpsL1CaGpsSdrAcquisition::set_doppler_max(unsigned int doppler_max)
{
doppler_max_ = doppler_max;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_doppler_max(doppler_max_);
}
else
{
acquisition_ss_->set_doppler_max(doppler_max_);
}
}
//! Set Channel Queue
void GpsL1CaGpsSdrAcquisition::set_channel_queue(
concurrent_queue<int> *channel_internal_queue)
{
channel_internal_queue_ = channel_internal_queue;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_channel_queue(channel_internal_queue_);
}
else
{
acquisition_ss_->set_channel_queue(channel_internal_queue_);
}
}
signed int GpsL1CaGpsSdrAcquisition::prn_code_phase()
{
if (item_type_.compare("gr_complex") == 0)
{
return acquisition_cc_->prn_code_phase();
}
else
{
return acquisition_ss_->prn_code_phase();
}
}
float GpsL1CaGpsSdrAcquisition::doppler_freq_shift()
{
if (item_type_.compare("gr_complex") == 0)
{
return acquisition_cc_->doppler_freq_phase();
}
else
{
return acquisition_ss_->doppler_freq_phase();
}
}
signed int GpsL1CaGpsSdrAcquisition::mag()
{
if (item_type_.compare("gr_complex") == 0)
{
return acquisition_cc_->mag();
}
else
{
return acquisition_ss_->mag();
}
}
void GpsL1CaGpsSdrAcquisition::reset()
{
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_active(true);
}
else
{
acquisition_ss_->set_active(true);
}
}
unsigned long int GpsL1CaGpsSdrAcquisition::get_sample_stamp()
{
if (item_type_.compare("gr_complex") == 0)
{
return acquisition_cc_->get_sample_stamp();
}
else
{
return acquisition_ss_->get_sample_stamp();
}
}
void GpsL1CaGpsSdrAcquisition::connect(gr_top_block_sptr top_block)
{
if (item_type_.compare("gr_complex") == 0)
{
//top_block->connect(stream_to_vector_, 0, vector_to_stream_,0);
top_block->connect(stream_to_vector_, 0, acquisition_cc_, 0);
//top_block->connect(acquisition_cc_, 0, vector_to_stream_, 0);
}
else
{
top_block->connect(stream_to_vector_, 0, acquisition_ss_, 0);
//top_block->connect(acquisition_ss_, 0, vector_to_stream_, 0);
}
}
void GpsL1CaGpsSdrAcquisition::disconnect(gr_top_block_sptr top_block)
{
if (item_type_.compare("gr_complex") == 0)
{
top_block->disconnect(stream_to_vector_, 0, acquisition_cc_, 0);
//top_block->disconnect(acquisition_cc_, 0, vector_to_stream_, 0);
}
else
{
top_block->disconnect(stream_to_vector_, 0, acquisition_ss_, 0);
//top_block->disconnect(acquisition_ss_, 0, vector_to_stream_, 0);
}
}
gr_basic_block_sptr GpsL1CaGpsSdrAcquisition::get_left_block()
{
return stream_to_vector_;
}
gr_basic_block_sptr GpsL1CaGpsSdrAcquisition::get_right_block()
{
if (item_type_.compare("gr_complex") == 0)
{
return acquisition_cc_;
}
else
{
return acquisition_ss_;
}
}

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/*!
* \file gps_l1_ca_gps_sdr_acquisition.h
* \brief Brief description of the file here
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
* Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* -------------------------------------------------------------------------
*
* 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 GNSS_SDR_ACQUISITION_H_
#define GNSS_SDR_ACQUISITION_H_
#include "acquisition_interface.h"
#include "gps_l1_ca_gps_sdr_acquisition_cc.h"
#include "gps_l1_ca_gps_sdr_acquisition_ss.h"
#include <gnuradio/gr_msg_queue.h>
class ConfigurationInterface;
/*!
* \brief Adapts the GPS-SDR acquisition implementation to
* an Acquisition Interface
*
* Derived from AcquisitionInterface, this class wraps the implementation
* of the acquisition algorithm proposed by Gregory Heckler at https://github.com/gps-sdr/gps-sdr
*
*/
class GpsL1CaGpsSdrAcquisition: public AcquisitionInterface
{
public:
GpsL1CaGpsSdrAcquisition(ConfigurationInterface* configuration,
std::string role, unsigned int in_streams,
unsigned int out_streams, gr_msg_queue_sptr queue);
virtual ~GpsL1CaGpsSdrAcquisition();
std::string role()
{
return role_;
}
std::string implementation()
{
return "Acquisition";
}
size_t item_size()
{
return item_size_;
}
void connect(gr_top_block_sptr top_block);
void disconnect(gr_top_block_sptr top_block);
gr_basic_block_sptr get_left_block();
gr_basic_block_sptr get_right_block();
void set_satellite(unsigned int satellite);
void set_channel(unsigned int channel);
void set_threshold(float threshold);
void set_doppler_max(unsigned int doppler_max);
void set_channel_queue(concurrent_queue<int> *channel_internal_queue);
signed int prn_code_phase();
float doppler_freq_shift();
signed int mag();
void reset();
unsigned long int get_sample_stamp();
//Not used in this implementation
void set_doppler_step(unsigned int doppler_step)
{};
private:
gps_l1_ca_gps_sdr_acquisition_cc_sptr acquisition_cc_;
gps_l1_ca_gps_sdr_acquisition_ss_sptr acquisition_ss_;
gr_block_sptr stream_to_vector_;
gr_block_sptr complex_to_short_;
gr_block_sptr short_to_complex_;
size_t item_size_;
std::string item_type_;
unsigned int vector_length_;
unsigned int satellite_;
unsigned int channel_;
float threshold_;
unsigned int doppler_max_;
unsigned int acquisition_ms_;
long fs_in_;
long if_;
bool dump_;
std::string dump_filename_;
std::string role_;
unsigned int in_streams_;
unsigned int out_streams_;
gr_msg_queue_sptr queue_;
concurrent_queue<int> *channel_internal_queue_;
};
#endif

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/*!
* \file gps_l1_ca_pcps_acquisition.cc
* \brief Brief description of the file here
* \author Javier Arribas, 2011. jarribas(at)cttc.es
* Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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/>.
*
* -------------------------------------------------------------------------
*/
#include "gps_l1_ca_pcps_acquisition.h"
#include "configuration_interface.h"
#include <iostream>
#include <gnuradio/gr_io_signature.h>
#include <gnuradio/gr_stream_to_vector.h>
#include <gnuradio/gr_vector_to_stream.h>
#include <gnuradio/gr_complex_to_interleaved_short.h>
#include <gnuradio/gr_interleaved_short_to_complex.h>
#include <glog/log_severity.h>
#include <glog/logging.h>
using google::LogMessage;
GpsL1CaPcpsAcquisition::GpsL1CaPcpsAcquisition(
ConfigurationInterface* configuration, std::string role,
unsigned int in_streams, unsigned int out_streams,
gr_msg_queue_sptr queue) :
role_(role), in_streams_(in_streams), out_streams_(out_streams), queue_(
queue)
{
std::string default_item_type = "gr_complex";
std::string default_dump_filename = "./data/acquisition.dat";
DLOG(INFO) << "role " << role;
item_type_ = configuration->property(role + ".item_type",
default_item_type);
satellite_ = 0;
fs_in_ = configuration->property(role + ".fs_in", 2048000);
if_ = configuration->property(role + ".ifreq", 0);
dump_ = configuration->property(role + ".dump", false);
shift_resolution_ = configuration->property(role + ".doppler_max", 15);
sampled_ms_ = configuration->property(role + ".sampled_ms", 1);
dump_filename_ = configuration->property(role + ".dump_filename",
default_dump_filename);
//--- Find number of samples per spreading code ----------------------------
const signed int _codeFreqBasis = 1023000; //Hz
const signed int _codeLength = 1023;
std::cout << fs_in_ << " " << role << std::endl;
vector_length_ = round(fs_in_ / (_codeFreqBasis / _codeLength));
printf("vector_length_ %i\n\r", vector_length_);
if (item_type_.compare("gr_complex") == 0)
{
item_size_ = sizeof(gr_complex);
acquisition_cc_ = gps_l1_ca_pcps_make_acquisition_cc(sampled_ms_,
shift_resolution_, if_, fs_in_, vector_length_, queue_,
dump_, dump_filename_);
stream_to_vector_ = gr_make_stream_to_vector(item_size_,
vector_length_);
}
else
{
LOG_AT_LEVEL(WARNING) << item_type_
<< " unknown acquisition item type";
}
DLOG(INFO) << "stream_to_vector(" << stream_to_vector_->unique_id()
<< ")";
}
GpsL1CaPcpsAcquisition::~GpsL1CaPcpsAcquisition()
{
}
void GpsL1CaPcpsAcquisition::set_satellite(unsigned int satellite)
{
satellite_ = satellite;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_satellite(satellite_);
}
}
void GpsL1CaPcpsAcquisition::set_channel(unsigned int channel)
{
channel_ = channel;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_channel(channel_);
}
}
void GpsL1CaPcpsAcquisition::set_threshold(float threshold)
{
threshold_ = threshold;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_threshold(threshold_);
}
}
void GpsL1CaPcpsAcquisition::set_doppler_max(unsigned int doppler_max)
{
doppler_max_ = doppler_max;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_doppler_max(doppler_max_);
}
}
void GpsL1CaPcpsAcquisition::set_doppler_step(unsigned int doppler_step)
{
doppler_step_ = doppler_step;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_doppler_step(doppler_step_);
}
}
void GpsL1CaPcpsAcquisition::set_channel_queue(
concurrent_queue<int> *channel_internal_queue)
{
channel_internal_queue_ = channel_internal_queue;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_channel_queue(channel_internal_queue_);
}
}
signed int GpsL1CaPcpsAcquisition::prn_code_phase()
{
if (item_type_.compare("gr_complex") == 0)
{
return acquisition_cc_->prn_code_phase();
}
else
{
return 0;
}
}
unsigned long int GpsL1CaPcpsAcquisition::get_sample_stamp()
{
if (item_type_.compare("gr_complex") == 0)
{
return acquisition_cc_->get_sample_stamp();
}
else
{
return 0;
}
}
float GpsL1CaPcpsAcquisition::doppler_freq_shift()
{
if (item_type_.compare("gr_complex") == 0)
{
return acquisition_cc_->doppler_freq();
}
else
{
return 0;
}
}
signed int GpsL1CaPcpsAcquisition::mag()
{
if (item_type_.compare("gr_complex") == 0)
{
return acquisition_cc_->mag();
}
else
{
return 0;
}
}
void GpsL1CaPcpsAcquisition::reset()
{
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_active(true);
}
}
void GpsL1CaPcpsAcquisition::connect(gr_top_block_sptr top_block)
{
if (item_type_.compare("gr_complex") == 0)
{
top_block->connect(stream_to_vector_, 0, acquisition_cc_, 0);
}
}
void GpsL1CaPcpsAcquisition::disconnect(gr_top_block_sptr top_block)
{
if (item_type_.compare("gr_complex") == 0)
{
top_block->disconnect(stream_to_vector_, 0, acquisition_cc_, 0);
}
}
gr_basic_block_sptr GpsL1CaPcpsAcquisition::get_left_block()
{
return stream_to_vector_;
}
gr_basic_block_sptr GpsL1CaPcpsAcquisition::get_right_block()
{
return acquisition_cc_;
}

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/*!
* \file gps_l1_ca_pcps_acquisition.h
* \brief Brief description of the file here
* \author Javier Arribas, 2011. jarribas(at)cttc.es
* Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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_PCPS_ACQUISITION_H_
#define GPS_L1_CA_PCPS_ACQUISITION_H_
#include "acquisition_interface.h"
#include "gps_l1_ca_pcps_acquisition_cc.h"
#include <gnuradio/gr_msg_queue.h>
class ConfigurationInterface;
class GpsL1CaPcpsAcquisition: public AcquisitionInterface
{
public:
GpsL1CaPcpsAcquisition(ConfigurationInterface* configuration,
std::string role, unsigned int in_streams,
unsigned int out_streams, gr_msg_queue_sptr queue);
virtual ~GpsL1CaPcpsAcquisition();
std::string role()
{
return role_;
}
std::string implementation()
{
return "Acquisition";
}
size_t item_size()
{
return item_size_;
}
void connect(gr_top_block_sptr top_block);
void disconnect(gr_top_block_sptr top_block);
gr_basic_block_sptr get_left_block();
gr_basic_block_sptr get_right_block();
void set_satellite(unsigned int satellite);
void set_channel(unsigned int channel);
void set_threshold(float threshold);
void set_doppler_max(unsigned int doppler_max);
void set_doppler_step(unsigned int doppler_step);
void set_channel_queue(concurrent_queue<int> *channel_internal_queue);
signed int prn_code_phase();
float doppler_freq_shift();
unsigned long int get_sample_stamp();
signed int mag();
void reset();
private:
gps_l1_ca_pcps_acquisition_cc_sptr acquisition_cc_;
gr_block_sptr stream_to_vector_;
gr_block_sptr complex_to_short_;
gr_block_sptr short_to_complex_;
size_t item_size_;
std::string item_type_;
unsigned int vector_length_;
unsigned int satellite_;
unsigned int channel_;
float threshold_;
unsigned int doppler_max_;
unsigned int doppler_step_;
unsigned int shift_resolution_;
unsigned int sampled_ms_;
long fs_in_;
long if_;
bool dump_;
std::string dump_filename_;
std::string role_;
unsigned int in_streams_;
unsigned int out_streams_;
gr_msg_queue_sptr queue_;
concurrent_queue<int> *channel_internal_queue_;
};
#endif /* GPS_L1_CA_PCPS_ACQUISITION_H_ */

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/*!
* \file gps_l1_ca_tong_pcps_acquisition.cc
* \brief Brief description of the file here
* \author Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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/>.
*
* -------------------------------------------------------------------------
*/
#include "gps_l1_ca_tong_pcps_acquisition.h"
#include "configuration_interface.h"
#include <gnuradio/gr_io_signature.h>
#include <gnuradio/gr_stream_to_vector.h>
#include <gnuradio/gr_vector_to_stream.h>
#include <gnuradio/gr_complex_to_interleaved_short.h>
#include <gnuradio/gr_interleaved_short_to_complex.h>
#include <glog/log_severity.h>
#include <glog/logging.h>
using google::LogMessage;
GpsL1CaTongPcpsAcquisition::GpsL1CaTongPcpsAcquisition(
ConfigurationInterface* configuration, std::string role,
unsigned int in_streams, unsigned int out_streams,
gr_msg_queue_sptr queue) :
role_(role), in_streams_(in_streams), out_streams_(out_streams), queue_(
queue)
{
std::string default_item_type = "gr_complex";
std::string default_dump_filename = "./data/acquisition.dat";
DLOG(INFO) << "role " << role;
item_type_ = configuration->property(role + ".item_type",
default_item_type);
std::cout << "item type " << item_type_ << std::endl;
satellite_ = 0;
fs_in_ = configuration->property(role + ".fs_in", 2048000);
if_ = configuration->property(role + ".ifreq", 0);
dump_ = configuration->property(role + ".dump", false);
doppler_max_ = configuration->property(role + ".doppler_max", 10);
sampled_ms_ = configuration->property(role + ".sampled_ms", 1);
dump_filename_ = configuration->property(role + ".dump_filename",
default_dump_filename);
//--- Find number of samples per spreading code ----------------------------
const signed int _codeFreqBasis = 1023000; //Hz
const signed int _codeLength = 1023;
vector_length_ = round(fs_in_ / (_codeFreqBasis / _codeLength));
printf("vector_length_ %i\n\r", vector_length_);
if (item_type_.compare("gr_complex") == 0)
{
item_size_ = sizeof(gr_complex);
acquisition_cc_ = gps_l1_ca_tong_pcps_make_acquisition_cc(
sampled_ms_, doppler_max_, if_, fs_in_, vector_length_,
queue_, dump_, dump_filename_);
stream_to_vector_ = gr_make_stream_to_vector(item_size_,
vector_length_);
}
else
{
LOG_AT_LEVEL(WARNING) << item_type_
<< " unknown acquisition item type";
}
DLOG(INFO) << "stream_to_vector(" << stream_to_vector_->unique_id()
<< ")";
}
GpsL1CaTongPcpsAcquisition::~GpsL1CaTongPcpsAcquisition()
{
}
void GpsL1CaTongPcpsAcquisition::set_satellite(unsigned int satellite)
{
satellite_ = satellite;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_satellite(satellite_);
}
}
void GpsL1CaTongPcpsAcquisition::set_channel(unsigned int channel)
{
channel_ = channel;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_channel(channel_);
}
}
void GpsL1CaTongPcpsAcquisition::set_doppler_max(unsigned int doppler_max)
{
doppler_max_ = doppler_max;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_doppler_max(doppler_max_);
}
}
void GpsL1CaTongPcpsAcquisition::set_doppler_step(unsigned int doppler_step)
{
doppler_step_ = doppler_step;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_doppler_step(doppler_step_);
}
}
void GpsL1CaTongPcpsAcquisition::set_channel_queue(
concurrent_queue<int> *channel_internal_queue)
{
channel_internal_queue_ = channel_internal_queue;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_channel_queue(channel_internal_queue_);
}
}
signed int GpsL1CaTongPcpsAcquisition::prn_code_phase()
{
if (item_type_.compare("gr_complex") == 0)
{
return acquisition_cc_->prn_code_phase();
}
else
{
return 0;
}
}
unsigned long int GpsL1CaTongPcpsAcquisition::get_sample_stamp()
{
if (item_type_.compare("gr_complex") == 0)
{
return acquisition_cc_->get_sample_stamp();
}
else
{
return 0;
}
}
float GpsL1CaTongPcpsAcquisition::doppler_freq_shift()
{
if (item_type_.compare("gr_complex") == 0)
{
return acquisition_cc_->doppler_freq();
}
else
{
return 0;
}
}
signed int GpsL1CaTongPcpsAcquisition::mag()
{
if (item_type_.compare("gr_complex") == 0)
{
return acquisition_cc_->mag();
}
else
{
return 0;
}
}
void GpsL1CaTongPcpsAcquisition::reset()
{
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_active(true);
acquisition_cc_->set_dwells(0);
acquisition_cc_->set_doppler(0);
}
}
void GpsL1CaTongPcpsAcquisition::connect(gr_top_block_sptr top_block)
{
if (item_type_.compare("gr_complex") == 0)
{
top_block->connect(stream_to_vector_, 0, acquisition_cc_, 0);
}
}
void GpsL1CaTongPcpsAcquisition::disconnect(gr_top_block_sptr top_block)
{
if (item_type_.compare("gr_complex") == 0)
{
top_block->disconnect(stream_to_vector_, 0, acquisition_cc_, 0);
}
}
gr_basic_block_sptr GpsL1CaTongPcpsAcquisition::get_left_block()
{
return stream_to_vector_;
}
gr_basic_block_sptr GpsL1CaTongPcpsAcquisition::get_right_block()
{
return acquisition_cc_;
}

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/*!
* \file gps_l1_ca_tong_pcps_acquisition.h
* \brief Brief description of the file here
* \author Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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_TONG_PCPS_ACQUISITION_H_
#define GPS_L1_CA_TONG_PCPS_ACQUISITION_H_
#include "acquisition_interface.h"
#include "gps_l1_ca_tong_pcps_acquisition_cc.h"
#include <gnuradio/gr_msg_queue.h>
class ConfigurationInterface;
class GpsL1CaTongPcpsAcquisition: public AcquisitionInterface
{
public:
GpsL1CaTongPcpsAcquisition(ConfigurationInterface* configuration,
std::string role, unsigned int in_streams,
unsigned int out_streams, gr_msg_queue_sptr queue);
virtual ~GpsL1CaTongPcpsAcquisition();
std::string role()
{
return role_;
}
std::string implementation()
{
return "Acquisition";
}
size_t item_size()
{
return item_size_;
}
void connect(gr_top_block_sptr top_block);
void disconnect(gr_top_block_sptr top_block);
gr_basic_block_sptr get_left_block();
gr_basic_block_sptr get_right_block();
void set_satellite(unsigned int satellite);
void set_channel(unsigned int channel);
void set_threshold(float threshold)
{
}
;
void set_doppler_max(unsigned int doppler_max);
void set_doppler_step(unsigned int doppler_step);
void set_channel_queue(concurrent_queue<int> *channel_internal_queue);
signed int prn_code_phase();
float doppler_freq_shift();
unsigned long int get_sample_stamp();
signed int mag();
void reset();
private:
gps_l1_ca_tong_pcps_acquisition_cc_sptr acquisition_cc_;
gr_block_sptr stream_to_vector_;
gr_block_sptr complex_to_short_;
gr_block_sptr short_to_complex_;
size_t item_size_;
std::string item_type_;
unsigned int vector_length_;
unsigned int satellite_;
unsigned int channel_;
float threshold_;
unsigned int doppler_max_;
unsigned int doppler_step_;
unsigned int shift_resolution_;
unsigned int sampled_ms_;
long fs_in_;
long if_;
bool dump_;
std::string dump_filename_;
std::string role_;
unsigned int in_streams_;
unsigned int out_streams_;
gr_msg_queue_sptr queue_;
concurrent_queue<int> *channel_internal_queue_;
};
#endif /* GPS_L1_CA_TONG_PCPS_ACQUISITION_H_ */

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project : build-dir ../../../../build ;
obj gps_l1_ca_gps_sdr_acquisition : gps_l1_ca_gps_sdr_acquisition.cc ;
obj gps_l1_ca_pcps_acquisition : gps_l1_ca_pcps_acquisition.cc ;
obj gps_l1_ca_tong_pcps_acquisition : gps_l1_ca_tong_pcps_acquisition.cc ;

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/*!
* \file gps_l1_ca_gps_sdr_acquisition_cc.cc
* \brief Brief description of the file here
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
* Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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/>.
*
* -------------------------------------------------------------------------
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gps_l1_ca_gps_sdr_acquisition_cc.h"
#include "control_message_factory.h"
#include "gps_sdr_x86.h"
#include <gnuradio/gr_io_signature.h>
#include <sstream>
#include <glog/log_severity.h>
#include <glog/logging.h>
#include <iostream>
using google::LogMessage;
gps_l1_ca_gps_sdr_acquisition_cc_sptr gps_l1_ca_gps_sdr_make_acquisition_cc(
unsigned int sampled_ms, long freq, long fs_in, int samples_per_ms,
gr_msg_queue_sptr queue, bool dump, std::string dump_filename)
{
return gps_l1_ca_gps_sdr_acquisition_cc_sptr(
new gps_l1_ca_gps_sdr_acquisition_cc(sampled_ms, freq, fs_in,
samples_per_ms, queue, dump, dump_filename));
}
gps_l1_ca_gps_sdr_acquisition_cc::gps_l1_ca_gps_sdr_acquisition_cc(
unsigned int sampled_ms, long freq, long fs_in, int samples_per_ms,
gr_msg_queue_sptr queue, bool dump, std::string dump_filename) :
gr_block("gps_l1_ca_gps_sdr_acquisition_cc", gr_make_io_signature(1, 1,
sizeof(gr_complex) * samples_per_ms), gr_make_io_signature(0, 0,
sizeof(gr_complex) * samples_per_ms))
{
// SAMPLE COUNTER
d_sample_counter = 0;
d_active = false;
d_dump = dump;
d_queue = queue;
d_dump_filename = dump_filename;
d_freq = freq;
d_fs_in = fs_in;
d_samples_per_ms = samples_per_ms;
d_sampled_ms = sampled_ms;
d_doppler_max = 0;
d_satellite = 0;
d_fft_size = d_sampled_ms * d_samples_per_ms;
d_doppler_freq_phase = 0.0;
d_prn_code_phase = 0;
d_mag = 0;
d_mean = 0.0;
d_count = 0;
d_sine_if = new gr_complex[d_fft_size];
d_sine_250 = new gr_complex[d_fft_size];
d_sine_500 = new gr_complex[d_fft_size];
d_sine_750 = new gr_complex[d_fft_size];
d_fft_codes = (gr_complex*)malloc(sizeof(gr_complex) * d_samples_per_ms);
// Direct FFT
d_fft_if = new gri_fft_complex(d_fft_size, true);
d_fft_250 = new gri_fft_complex(d_fft_size, true);
d_fft_500 = new gri_fft_complex(d_fft_size, true);
d_fft_750 = new gri_fft_complex(d_fft_size, true);
// Inverse FFT
d_ifft = new gri_fft_complex(d_fft_size, false);
d_best_magnitudes = new float[d_fft_size];
sine_gen_complex(d_sine_if, -d_freq, d_fs_in, d_fft_size);
sine_gen_complex(d_sine_250, -d_freq - 250, d_fs_in, d_fft_size);
sine_gen_complex(d_sine_500, -d_freq - 500, d_fs_in, d_fft_size);
sine_gen_complex(d_sine_750, -d_freq - 750, d_fs_in, d_fft_size);
DLOG(INFO) << "fs in " << d_fs_in;
DLOG(INFO) << "Doppler max " << d_doppler_max;
DLOG(INFO) << "IF " << d_freq;
DLOG(INFO) << "Satellite " << d_satellite;
DLOG(INFO) << "Sampled_ms " << d_sampled_ms;
DLOG(INFO) << "FFT_size " << d_fft_size;
DLOG(INFO) << "dump filename " << d_dump_filename;
DLOG(INFO) << "dump " << d_dump;
}
gps_l1_ca_gps_sdr_acquisition_cc::~gps_l1_ca_gps_sdr_acquisition_cc()
{
delete d_sine_if;
delete d_sine_250;
delete d_sine_500;
delete d_sine_750;
delete d_fft_codes;
delete d_fft_if;
delete d_fft_250;
delete d_fft_500;
delete d_fft_750;
if (d_dump)
{
d_dump_file.close();
}
}
void gps_l1_ca_gps_sdr_acquisition_cc::set_satellite(unsigned int satellite)
{
d_satellite = satellite;
d_prn_code_phase = 0;
d_doppler_freq_phase = 0;
d_mag = 0;
// Now the GPS codes are generated on the fly using a custom version of the GPS code generator
code_gen_complex_sampled(d_fft_if->get_inbuf(), satellite, d_fs_in, 0);
d_fft_if->execute(); // We need the FFT of GPS C/A code
memcpy(d_fft_codes, d_fft_if->get_outbuf(), sizeof(gr_complex)
* d_samples_per_ms);
}
signed int gps_l1_ca_gps_sdr_acquisition_cc::prn_code_phase()
{
return d_prn_code_phase;
}
int gps_l1_ca_gps_sdr_acquisition_cc::general_work(int noutput_items,
gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
if (!d_active)
{
d_sample_counter += d_fft_size * noutput_items; // sample counter
consume_each(noutput_items);
return 0;
}
d_sample_counter += d_fft_size; // sample counter
bool positive_acquisition = false;
int acquisition_message = -1; //0=STOP_CHANNEL 1=ACQ_SUCCEES 2=ACQ_FAIL
LOG_AT_LEVEL(INFO) << "Channel: " << d_channel
<< " , doing acquisition of satellite: " << d_satellite
<< " ,at sample stamp: " << d_sample_counter;
const gr_complex *in = (const gr_complex *)input_items[0];
//Perform the carrier wipe-off
for (unsigned int j = 0; j < d_fft_size; j++)
{
d_fft_if->get_inbuf()[j] = in[j] * d_sine_if[j];
d_fft_250->get_inbuf()[j] = in[j] * d_sine_250[j];
d_fft_500->get_inbuf()[j] = in[j] * d_sine_500[j];
d_fft_750->get_inbuf()[j] = in[j] * d_sine_750[j];
}
// Perform the FFT of the resulting signal
d_fft_if->execute();
d_fft_250->execute();
d_fft_500->execute();
d_fft_750->execute();
//----------------------------------------------------------------------
//---Calculate cross-correlation magnitudes using:
//----> the circular convolution property of FFT:
//----> the frequency-shift property of the FFT: y(t)=exp(jw0t)x(t) -> Y(w)=X(w-w0)
for (int j = (int)-(d_doppler_max / 1000); j < (int)d_doppler_max / 1000; j++)
{ // doppler search steps
calculate_magnitudes(d_fft_if->get_outbuf(), j, 0);
calculate_magnitudes(d_fft_250->get_outbuf(), j, 1);
calculate_magnitudes(d_fft_500->get_outbuf(), j, 2);
calculate_magnitudes(d_fft_750->get_outbuf(), j, 3);
}
if (d_dump)
{
std::stringstream ss;
ss << "./data/acquisition_" << d_channel << "_" << d_satellite << "_"
<< d_count << ".dat";
d_dump_file.open(ss.str().c_str(), std::ios::out | std::ios::binary);
std::streamsize n = sizeof(float) * (d_fft_size);
d_dump_file.write((char*)d_best_magnitudes, n);
d_dump_file.close();
}
if (d_test_statistics > d_threshold)
{ //TODO: Include in configuration parameters and check value!!
positive_acquisition = true;
d_acq_sample_stamp = d_sample_counter;
LOG_AT_LEVEL(INFO) << "POSITIVE ACQUISITION of channel " << d_channel;
LOG_AT_LEVEL(INFO) << "Satellite " << d_satellite;
LOG_AT_LEVEL(INFO) << "Code Phase " << d_prn_code_phase;
LOG_AT_LEVEL(INFO) << "Doppler " << d_doppler_freq_phase;
LOG_AT_LEVEL(INFO) << "Magnitude " << d_mag;
LOG_AT_LEVEL(INFO) << "Mean " << d_mean;
LOG_AT_LEVEL(INFO) << "Test statistics value " << d_test_statistics;
LOG_AT_LEVEL(INFO) << "Test statistics threshold " << d_threshold;
LOG_AT_LEVEL(INFO) << "Acq sample stamp " << d_acq_sample_stamp;
}
else
{
LOG_AT_LEVEL(INFO) << "NEGATIVE ACQUISITION of channel " << d_channel;
LOG_AT_LEVEL(INFO) << "Satellite " << d_satellite;
LOG_AT_LEVEL(INFO) << "Test statistics value " << d_test_statistics;
LOG_AT_LEVEL(INFO) << "Test statistics threshold " << d_threshold;
LOG_AT_LEVEL(INFO) << "Acq sample stamp " << d_acq_sample_stamp;
}
d_active = false;
LOG_AT_LEVEL(INFO) << "d_count " << d_count;
if (positive_acquisition)
{
acquisition_message = 1;
}
else
{
acquisition_message = 2;
}
d_channel_internal_queue->push(acquisition_message);
return 0;
}
void gps_l1_ca_gps_sdr_acquisition_cc::calculate_magnitudes(
gr_complex* fft_signal, int doppler_shift, int doppler_offset)
{
unsigned int indext = 0;
float magt = 0.0;
std::complex<float> tmp_cpx;
// FFT frequency-shift property
if (doppler_shift != 0)
{
for (unsigned int i = 0; i < d_fft_size; i++)
{
//complex conjugate (optimize me!)
tmp_cpx = std::complex<float>(d_fft_codes[i].real(),
-d_fft_codes[i].imag());
d_ifft->get_inbuf()[i] = fft_signal[(doppler_shift + i
+ d_fft_size) % d_fft_size] * tmp_cpx;
}
}
else
{
for (unsigned int i = 0; i < d_fft_size; i++)
{
//complex conjugate (optimize me!)
tmp_cpx = std::complex<float>(d_fft_codes[i].real(),
-d_fft_codes[i].imag());
d_ifft->get_inbuf()[i] = fft_signal[i] * tmp_cpx;
}
}
d_ifft->execute(); // inverse FFT of the result = convolution in time
x86_gr_complex_mag(d_ifft->get_outbuf(), d_fft_size); // d_ifft->get_outbuf()=|abs(·)|^2
x86_float_max((float*)d_ifft->get_outbuf(), &indext, &magt, d_fft_size); // find max of |abs(·)|^2 -> index and magt
if (magt > d_mag)
{ // if the magnitude is > threshold
// save the synchronization parameters
d_mag = magt;
d_prn_code_phase = indext;
d_doppler_freq_phase = -((doppler_shift * 1000.0) + (doppler_offset
* 250.0));
// save the circular correlation of this Doppler shift
memcpy(d_best_magnitudes, d_ifft->get_outbuf(), sizeof(float)
* d_fft_size);
// Remove the maximum and its neighbours to calculate the mean
((float*)d_ifft->get_outbuf())[indext] = 0.0;
if (indext != 0)
{
((float*)d_ifft->get_outbuf())[indext - 1] = 0.0;
}
if (indext != d_fft_size - 1)
{
((float*)d_ifft->get_outbuf())[indext + 1] = 0.0;
}
for (unsigned int i = 0; i < d_fft_size; i++)
{
d_mean += ((float*)d_ifft->get_outbuf())[i];
}
d_mean = d_mean / d_fft_size;
d_test_statistics = d_mag / d_mean;
}
}

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/*!
* \file gps_l1_ca_gps_sdr_acquisition_cc.h
* \brief Brief description of the file here
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
* Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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 INCLUDED_GPS_L1_CA_GPS_SDR_ACQUISITION_CC_H
#define INCLUDED_GPS_L1_CA_GPS_SDR_ACQUISITION_CC_H
#include <fstream>
#include <gnuradio/gr_block.h>
#include <gnuradio/gr_msg_queue.h>
#include <gnuradio/gr_complex.h>
#include <gnuradio/gri_fft.h>
#include <queue>
#include <boost/thread/mutex.hpp>
#include <boost/thread/thread.hpp>
#include "concurrent_queue.h"
class gps_l1_ca_gps_sdr_acquisition_cc;
typedef boost::shared_ptr<gps_l1_ca_gps_sdr_acquisition_cc>
gps_l1_ca_gps_sdr_acquisition_cc_sptr;
gps_l1_ca_gps_sdr_acquisition_cc_sptr
gps_l1_ca_gps_sdr_make_acquisition_cc(unsigned int sampled_ms, long freq,
long fs_in, int samples_per_ms, gr_msg_queue_sptr queue, bool dump,
std::string dump_filename);
class gps_l1_ca_gps_sdr_acquisition_cc: public gr_block
{
private:
friend gps_l1_ca_gps_sdr_acquisition_cc_sptr
gps_l1_ca_gps_sdr_make_acquisition_cc(unsigned int sampled_ms, long freq,
long fs_in, int samples_per_ms, gr_msg_queue_sptr queue,
bool dump, std::string dump_filename);
gps_l1_ca_gps_sdr_acquisition_cc(unsigned int sampled_ms, long freq,
long fs_in, int samples_per_ms, gr_msg_queue_sptr queue,
bool dump, std::string dump_filename);
void calculate_magnitudes(gr_complex* fft_begin, int doppler_shift,
int doppler_offset);
long d_fs_in;
long d_freq;
int d_samples_per_ms;
unsigned int d_satellite;
float d_threshold;
std::string d_satellite_str;
unsigned int d_doppler_max;
unsigned int d_sampled_ms;
unsigned int d_fft_size;
unsigned long int d_sample_counter;
unsigned long int d_acq_sample_stamp;
gr_complex* d_baseband_signal;
gr_complex* d_sine_if;
gr_complex* d_sine_250;
gr_complex* d_sine_500;
gr_complex* d_sine_750;
gr_complex* d_fft_codes;
gri_fft_complex* d_fft_if;
gri_fft_complex* d_fft_250;
gri_fft_complex* d_fft_500;
gri_fft_complex* d_fft_750;
gri_fft_complex* d_ifft;
float* d_best_magnitudes;
unsigned int d_prn_code_phase;
float d_doppler_freq_phase;
float d_mag;
float d_mean;
float d_test_statistics;
gr_msg_queue_sptr d_queue;
concurrent_queue<int> *d_channel_internal_queue;
std::ofstream d_dump_file;
unsigned int d_count;
bool d_active;
bool d_dump;
unsigned int d_channel;
std::string d_dump_filename;
public:
~gps_l1_ca_gps_sdr_acquisition_cc();
signed int prn_code_phase();
float doppler_freq_phase()
{
return d_doppler_freq_phase;
}
unsigned int mag()
{
return d_mag;
}
unsigned long int get_sample_stamp()
{
return d_acq_sample_stamp;
}
void set_satellite(unsigned int satellite);
void set_active(bool active)
{
d_active = active;
}
void set_channel(unsigned int channel)
{
d_channel = channel;
}
void set_threshold(float threshold)
{
d_threshold = threshold;
}
void set_doppler_max(unsigned int doppler_max)
{
d_doppler_max = doppler_max;
}
void set_channel_queue(concurrent_queue<int> *channel_internal_queue)
{
d_channel_internal_queue = channel_internal_queue;
}
int general_work(int noutput_items, gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif /* INCLUDED_GPS_L1_CA_GPS_SDR_ACQUISITION_CC_H */

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/*!
* \file gps_l1_ca_gps_sdr_acquisition_ss.cc
* \brief Brief description of the file here
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
* Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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/>.
*
* -------------------------------------------------------------------------
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gps_l1_ca_gps_sdr_acquisition_ss.h"
#include "gps_sdr_simd.h"
#include "gps_sdr_fft.h"
#include "gps_sdr_prn_codes_short.h"
#include "control_message_factory.h"
#include "gps_sdr_x86.h"
#include <gnuradio/gr_io_signature.h>
#include <sstream>
#include <glog/log_severity.h>
#include <glog/logging.h>
using google::LogMessage;
gps_l1_ca_gps_sdr_acquisition_ss_sptr gps_l1_ca_gps_sdr_make_acquisition_ss(
unsigned int sampled_ms, long freq, long fs_in, int samples_per_ms,
gr_msg_queue_sptr queue, bool dump, std::string dump_filename)
{
return gps_l1_ca_gps_sdr_acquisition_ss_sptr(
new gps_l1_ca_gps_sdr_acquisition_ss(sampled_ms, freq, fs_in,
samples_per_ms, queue, dump, dump_filename));
}
gps_l1_ca_gps_sdr_acquisition_ss::gps_l1_ca_gps_sdr_acquisition_ss(
unsigned int sampled_ms, long freq, long fs_in, int samples_per_ms,
gr_msg_queue_sptr queue, bool dump, std::string dump_filename) :
gr_block("gps_l1_ca_gps_sdr_acquisition_ss", gr_make_io_signature(1, 1,
sizeof(short) * 2 * samples_per_ms), gr_make_io_signature(0, 0,
sizeof(short) * 2 * samples_per_ms))
{
// SAMPLE COUNTER
d_sample_counter = 0;
d_active = false;
d_dump = dump;
d_queue = queue;
d_dump_filename = dump_filename;
d_fs_in = fs_in;
d_samples_per_ms = samples_per_ms;
d_doppler_resolution = 4;
d_freq = freq;
d_satellite = 0;
d_doppler_max = 0;
d_sampled_ms = sampled_ms;
d_fft_size = d_sampled_ms * d_samples_per_ms;
d_doppler_freq_shift = 0.0;
d_prn_code_phase = 0;
d_mag = 0;
d_sine_if = new CPX[d_fft_size];
d_sine_250 = new CPX[d_fft_size];
d_sine_500 = new CPX[d_fft_size];
d_sine_750 = new CPX[d_fft_size];
d_baseband_signal = new CPX[d_doppler_resolution * d_fft_size];
d_baseband_signal_shift = new CPX[d_doppler_resolution * (d_fft_size
+ 201)];
signed int R1[16] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
d_pFFT = new FFT(d_fft_size, R1);
signed int R2[16] = { 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1 };
d_piFFT = new FFT(d_fft_size, R2);
for (int i = 0; i < 32; i++)
{
d_fft_codes[i] = (CPX *)&PRN_Codes_Short[sizeof(short) * i
* d_samples_per_ms];
}
sine_gen(d_sine_if, -d_freq, d_fs_in, d_fft_size);
sine_gen(d_sine_250, -d_freq - 250, d_fs_in, d_fft_size);
sine_gen(d_sine_500, -d_freq - 500, d_fs_in, d_fft_size);
sine_gen(d_sine_750, -d_freq - 750, d_fs_in, d_fft_size);
DLOG(INFO) << "fs in " << d_fs_in;
DLOG(INFO) << "samples per ms " << d_samples_per_ms;
DLOG(INFO) << "doppler resolution " << d_doppler_resolution;
DLOG(INFO) << "freq " << d_freq;
DLOG(INFO) << "satellite " << d_satellite;
DLOG(INFO) << "sampled_ms " << d_sampled_ms;
DLOG(INFO) << "fft_size " << d_fft_size;
DLOG(INFO) << "dump filename " << d_dump_filename;
DLOG(INFO) << "dump " << d_dump;
}
gps_l1_ca_gps_sdr_acquisition_ss::~gps_l1_ca_gps_sdr_acquisition_ss()
{
delete d_baseband_signal;
delete d_baseband_signal_shift;
delete d_sine_if;
delete d_sine_250;
delete d_sine_500;
delete d_sine_750;
delete d_pFFT;
delete d_piFFT;
if (d_dump)
{
d_dump_file.close();
}
}
void gps_l1_ca_gps_sdr_acquisition_ss::set_satellite(unsigned int satellite)
{
d_satellite = satellite;
d_prn_code_phase = 0;
d_doppler_freq_shift = 0;
d_mag = 0;
DLOG(INFO) << "satellite set to " << d_satellite;
}
signed int gps_l1_ca_gps_sdr_acquisition_ss::prn_code_phase()
{
return d_prn_code_phase;
}
int gps_l1_ca_gps_sdr_acquisition_ss::general_work(int noutput_items,
gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
if (!d_active)
{
d_sample_counter += d_fft_size * noutput_items; // sample counter
consume_each(noutput_items);
}
else
{
d_sample_counter += d_fft_size; // sample counter
const CPX *in = (const CPX *)input_items[0];
CPX* buffer = new CPX[d_fft_size];
signed int index = 0;
unsigned int indext = 0;
unsigned int magt = 0;
DLOG(INFO) << "copied " << (d_fft_size * sizeof(CPX))
<< " bytes into buffer (" << d_fft_size << " samples)";
memcpy(d_baseband_signal, in, d_fft_size * sizeof(CPX));
sse_cmulsc(d_baseband_signal, d_sine_250,
&d_baseband_signal[d_fft_size], d_fft_size, 14);
sse_cmulsc(d_baseband_signal, d_sine_500, &d_baseband_signal[2
* d_fft_size], d_fft_size, 14);
sse_cmulsc(d_baseband_signal, d_sine_750, &d_baseband_signal[3
* d_fft_size], d_fft_size, 14);
sse_cmuls(d_baseband_signal, d_sine_if, d_fft_size, 14);
for (unsigned int i = 0; i < d_doppler_resolution; i++)
{
d_pFFT->doFFT(&d_baseband_signal[i * d_fft_size], true);
memcpy(&d_baseband_signal_shift[i * (d_fft_size + 201)],
&d_baseband_signal[(i + 1) * d_fft_size - 100], 100
* sizeof(CPX));
memcpy(&d_baseband_signal_shift[(i * (d_fft_size + 201)) + 100],
&d_baseband_signal[i * d_fft_size], d_fft_size
* sizeof(CPX));
memcpy(&d_baseband_signal_shift[(i * (d_fft_size + 201)) + 100
+ d_fft_size], &d_baseband_signal[i * d_fft_size], 100
* sizeof(CPX));
}
// Here begins the actual acquisition process.
for (int i = -d_doppler_max / 1000; i < (int)d_doppler_max / 1000; i++)
{
for (unsigned int j = 0; j < d_doppler_resolution; j++)
{
sse_cmulsc(&d_baseband_signal_shift[(j * (d_fft_size + 201))
+ 100 + i], d_fft_codes[d_satellite], buffer,
d_fft_size, 10);
d_piFFT->doiFFT(buffer, true);
x86_cmag(buffer, d_fft_size);
x86_max((unsigned int *)buffer, &indext, &magt, d_fft_size);
if (magt > d_mag)
{
d_mag = magt;
index = indext;
d_prn_code_phase = ceil((index * d_samples_per_ms)
/ d_fft_size);
d_doppler_freq_shift = (i * 1000.0) + (j * 250.0);
if (d_dump)
{
d_dump_file.open(d_dump_filename.c_str(),
std::ios::out | std::ios::binary);
std::streamsize n = sizeof(unsigned int) * d_fft_size;
d_dump_file.write((char*)buffer, n);
d_dump_file.close();
}
}
}
}
DLOG(INFO) << "satellite " << d_satellite;
//result->code_phase = 2048 - index;
DLOG(INFO) << "code phase " << d_prn_code_phase;
//result->doppler = (lcv*1000) + (float)lcv2*250;
DLOG(INFO) << "doppler " << d_doppler_freq_shift;
//result->magnitude = mag;
DLOG(INFO) << "magnitude " << d_mag;
d_active = false;
delete buffer;
DLOG(INFO) << "Acquisition done";
int acquisition_message = -1; //0=STOP_CHANNEL 1=ACQ_SUCCEES 2=ACQ_FAIL
if (d_mag > d_threshold)
{
d_acq_sample_stamp = d_sample_counter;
acquisition_message = 1; //ACQ_SUCCES
}
else
{
acquisition_message = 2; //ACQ_FAIL
}
d_channel_internal_queue->push(acquisition_message);
consume_each(1);
}
return 0;
}

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/*!
* \file gps_l1_ca_gps_sdr_acquisition_ss.h
* \brief Brief description of the file here
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
* Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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 INCLUDED_GPS_L1_CA_GPS_SDR_ACQUISITION_SS_H
#define INCLUDED_GPS_L1_CA_GPS_SDR_ACQUISITION_SS_H
#include <fstream>
#include <gnuradio/gr_block.h>
#include <gnuradio/gr_msg_queue.h>
#include "gps_sdr_signal_processing.h"
#include <queue>
#include <boost/thread/mutex.hpp>
#include <boost/thread/thread.hpp>
#include "concurrent_queue.h"
class FFT;
class gps_l1_ca_gps_sdr_acquisition_ss;
typedef boost::shared_ptr<gps_l1_ca_gps_sdr_acquisition_ss>
gps_l1_ca_gps_sdr_acquisition_ss_sptr;
gps_l1_ca_gps_sdr_acquisition_ss_sptr
gps_l1_ca_gps_sdr_make_acquisition_ss(unsigned int sampled_ms, long freq,
long fs_in, int samples_per_ms, gr_msg_queue_sptr queue, bool dump,
std::string dump_filename);
class gps_l1_ca_gps_sdr_acquisition_ss: public gr_block
{
private:
friend gps_l1_ca_gps_sdr_acquisition_ss_sptr
gps_l1_ca_gps_sdr_make_acquisition_ss(unsigned int sampled_ms, long freq,
long fs_in, int samples_per_ms, gr_msg_queue_sptr queue,
bool dump, std::string dump_filename);
gps_l1_ca_gps_sdr_acquisition_ss(unsigned int sampled_ms, long freq,
long fs_in, int samples_per_ms, gr_msg_queue_sptr queue,
bool dump, std::string dump_filename);
long d_fs_in;
long d_freq;
int d_samples_per_ms;
unsigned int d_satellite;
float d_threshold;
unsigned int d_doppler_max;
unsigned int d_doppler_resolution;
unsigned int d_sampled_ms;
unsigned int d_fft_size;
unsigned long int d_sample_counter;
unsigned long int d_acq_sample_stamp;
CPX* d_baseband_signal;
CPX* d_baseband_signal_shift;
CPX* d_sine_if;
CPX* d_sine_250;
CPX* d_sine_500;
CPX* d_sine_750;
FFT* d_pFFT;
FFT* d_piFFT;
CPX* d_fft_codes[32];
signed int d_prn_code_phase;
float d_doppler_freq_shift;
unsigned int d_mag;
gr_msg_queue_sptr d_queue;
concurrent_queue<int> *d_channel_internal_queue;
std::ofstream d_dump_file;
bool d_active;
bool d_dump;
unsigned int d_channel;
std::string d_dump_filename;
public:
~gps_l1_ca_gps_sdr_acquisition_ss();
signed int prn_code_phase();
float doppler_freq_phase()
{
return d_doppler_freq_shift;
}
unsigned int mag()
{
return d_mag;
}
unsigned long int get_sample_stamp()
{
return d_acq_sample_stamp;
}
void set_satellite(unsigned int satellite);
void set_active(bool active)
{
d_active = active;
}
void set_channel(unsigned int channel)
{
d_channel = channel;
}
void set_threshold(float threshold)
{
d_threshold = threshold;
}
void set_doppler_max(unsigned int doppler_max)
{
d_doppler_max = doppler_max;
}
void set_channel_queue(concurrent_queue<int> *channel_internal_queue)
{
d_channel_internal_queue = channel_internal_queue;
}
int general_work(int noutput_items, gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif /* INCLUDED_GPS_L1_CA_GPS_SDR_ACQUISITION_SS_H */

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/*!
* \file gps_l1_ca_pcps_acquisition_cc.h
* \brief Brief description of the file here
* \author Javier Arribas, 2011. jarribas(at)cttc.es
* Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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/>.
*
* -------------------------------------------------------------------------
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gps_l1_ca_pcps_acquisition_cc.h"
#include "gps_sdr_signal_processing.h"
#include "control_message_factory.h"
#include "gps_sdr_x86.h"
#include <gnuradio/gr_io_signature.h>
#include <sstream>
#include <glog/log_severity.h>
#include <glog/logging.h>
using google::LogMessage;
gps_l1_ca_pcps_acquisition_cc_sptr gps_l1_ca_pcps_make_acquisition_cc(
unsigned int sampled_ms, unsigned int doppler_max, long freq,
long fs_in, int samples_per_ms, gr_msg_queue_sptr queue, bool dump,
std::string dump_filename)
{
return gps_l1_ca_pcps_acquisition_cc_sptr(
new gps_l1_ca_pcps_acquisition_cc(sampled_ms, doppler_max, freq,
fs_in, samples_per_ms, queue, dump, dump_filename));
}
gps_l1_ca_pcps_acquisition_cc::gps_l1_ca_pcps_acquisition_cc(
unsigned int sampled_ms, unsigned int doppler_max, long freq,
long fs_in, int samples_per_ms, gr_msg_queue_sptr queue, bool dump,
std::string dump_filename) :
gr_block("gps_l1_ca_pcps_acquisition_cc", gr_make_io_signature(1, 1,
sizeof(gr_complex) * samples_per_ms), gr_make_io_signature(0, 0,
sizeof(gr_complex) * samples_per_ms))
{
// SAMPLE COUNTER
d_sample_counter = 0;
d_active = false;
d_dump = dump;
d_queue = queue;
d_dump_filename = dump_filename;
d_freq = freq;
d_fs_in = fs_in;
d_samples_per_ms = samples_per_ms;
d_sampled_ms = sampled_ms;
d_doppler_max = doppler_max;
d_satellite = 0;
d_fft_size = d_sampled_ms * d_samples_per_ms;
d_doppler_freq = 0.0;
d_code_phase = 0;
d_mag = 0;
d_input_power = 0.0;
d_sine_if = new gr_complex[d_fft_size];
d_fft_codes = (gr_complex*)malloc(sizeof(gr_complex) * d_samples_per_ms);
// Direct FFT
d_fft_if = new gri_fft_complex(d_fft_size, true);
// Inverse FFT
d_ifft = new gri_fft_complex(d_fft_size, false);
DLOG(INFO) << "fs in " << d_fs_in;
DLOG(INFO) << "samples per ms " << d_samples_per_ms;
DLOG(INFO) << "doppler max " << d_doppler_max;
DLOG(INFO) << "freq " << d_freq;
DLOG(INFO) << "satellite " << d_satellite;
DLOG(INFO) << "sampled_ms " << d_sampled_ms;
DLOG(INFO) << "fft_size " << d_fft_size;
DLOG(INFO) << "dump filename " << d_dump_filename;
DLOG(INFO) << "dump " << d_dump;
}
gps_l1_ca_pcps_acquisition_cc::~gps_l1_ca_pcps_acquisition_cc()
{
delete d_sine_if;
delete d_fft_codes;
if (d_dump)
{
d_dump_file.close();
}
}
void gps_l1_ca_pcps_acquisition_cc::set_satellite(unsigned int satellite)
{
d_satellite = satellite;
d_code_phase = 0;
d_doppler_freq = 0;
d_mag = 0;
d_input_power = 0.0;
// Now the GPS codes are generated on the fly using a custom version of the GPS code generator
code_gen_complex_sampled(d_fft_if->get_inbuf(), satellite, d_fs_in, 0);
d_fft_if->execute(); // We need the FFT of GPS C/A code
//Conjugate the local code
//TODO Optimize it !
for (unsigned int i = 0; i < d_fft_size; i++)
{
d_fft_codes[i] = std::complex<float>(
d_fft_if->get_outbuf()[i].real(),
-d_fft_if->get_outbuf()[i].imag());
d_fft_codes[i] = d_fft_codes[i] / (float)d_fft_size; //to correct the scale factor introduced by FFTW
}
//memcpy(d_fft_codes,d_fft_if->get_outbuf(),sizeof(gr_complex)*d_samples_per_ms);
// std::stringstream filename;
// std::streamsize n = 2*sizeof(float)*(d_fft_size); // complex file write
// filename.str("");
// filename << "./data/code.dat";
// std::cout<<filename.str().c_str();
// std::cout<<".\n";
// d_dump_file.open(filename.str().c_str(), std::ios::out | std::ios::binary);
//
//
// d_dump_file.write((char*)d_ifft->get_inbuf(), n); //write directly |abs(·)|^2 in this Doppler bin
// //d_dump_file.write((char*)d_sine_if, n); //to be read with read_complex_binary() -> test OK
// d_dump_file.close();
}
signed int gps_l1_ca_pcps_acquisition_cc::prn_code_phase()
{
return d_code_phase;
}
int gps_l1_ca_pcps_acquisition_cc::general_work(int noutput_items,
gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
/*!
* By J.Arribas
* Acquisition A strategy (Kay Borre book + CFAR threshold):
* 1º- Compute the input signal power estimation
* 2º- Doppler serial search loop
* 3º- Perform the FFT-based circular convolution (parallel time search)
* 4º- record the maximum peak and the associated synchronization parameters
* 5º- Compute the test statistics and compare to the threshold
* 6º- Declare positive or negative acquisition using a message queue
*/
if (!d_active)
{
d_sample_counter += d_fft_size * noutput_items; // sample counter
consume_each(noutput_items);
}
else
{
d_sample_counter += d_fft_size; // sample counter
// initialize acquisition algorithm
int doppler;
unsigned int indext = 0;
float magt = 0.0;
const gr_complex *in = (const gr_complex *)input_items[0]; //Get the input samples pointer
bool positive_acquisition = false;
int acquisition_message = -1; //0=STOP_CHANNEL 1=ACQ_SUCCEES 2=ACQ_FAIL
//aux vars
unsigned int i;
std::stringstream filename;
std::streamsize n = 2 * sizeof(float) * (d_fft_size); // complex file write
LOG_AT_LEVEL(INFO) << "Channel: " << d_channel
<< " , doing acquisition of satellite: " << d_satellite
<< " ,sample stamp: " << d_sample_counter << ", threshold: "
<< d_threshold << ", doppler_max: " << d_doppler_max
<< ", doppler_step: " << d_doppler_step;
// 1º Compute the input signal power estimation
for (i = 0; i < d_fft_size; i++)
{
d_input_power += std::abs(in[i]) * std::abs(in[i]);
}
d_input_power = d_input_power / ((float)d_fft_size
* (float)d_fft_size);
// 2º- Doppler frequency search loop
for (doppler = (int)(-d_doppler_max); doppler < (int)d_doppler_max; doppler
+= d_doppler_step)
{ // doppler search steps
//Perform the carrier wipe-off
sine_gen_complex(d_sine_if, d_freq + doppler, d_fs_in, d_fft_size);
for (i = 0; i < d_fft_size; i++)
{
d_fft_if->get_inbuf()[i] = in[i] * d_sine_if[i];
}
//3º- Perform the FFT-based circular convolution (parallel time search)
d_fft_if->execute(); //TODO Optimize me
for (i = 0; i < d_fft_size; i++)
{
d_ifft->get_inbuf()[i] = (d_fft_if->get_outbuf()[i]
* d_fft_codes[i]) / (float)d_fft_size;
}
d_ifft->execute();
x86_gr_complex_mag(d_ifft->get_outbuf(), d_fft_size); // d_ifft->get_outbuf()=|abs(·)|^2 and the array is converted from CPX->Float
x86_float_max((float*)d_ifft->get_outbuf(), &indext, &magt,
d_fft_size); // find max of |abs(·)|^2 -> index and magt
magt = magt / (float)d_fft_size;
// Record results to files
if (d_dump)
{
filename.str("");
filename << "./data/fft_" << doppler << "_.dat";
std::cout << filename.str().c_str();
std::cout << ".\n";
d_dump_file.open(filename.str().c_str(), std::ios::out
| std::ios::binary);
d_dump_file.write((char*)d_ifft->get_outbuf(), n); //write directly |abs(·)|^2 in this Doppler bin
d_dump_file.close();
}
// 4º- record the maximum peak and the associated synchronization parameters
if (d_mag < magt)
{
d_mag = magt;
d_code_phase = indext;
d_doppler_freq = doppler;
}
}
// 5º- Compute the test statistics and compare to the threshold
d_test_statistics = d_mag / d_input_power;
// 6º- Declare positive or negative acquisition using a message queue
if (d_test_statistics > d_threshold)
{ //0.004
positive_acquisition = true;
d_acq_sample_stamp = d_sample_counter;
LOG_AT_LEVEL(INFO) << "positive acquisition";
LOG_AT_LEVEL(INFO) << "satellite " << d_satellite;
LOG_AT_LEVEL(INFO) << "sample_stamp" << d_sample_counter;
LOG_AT_LEVEL(INFO) << "test statistics value "
<< d_test_statistics;
LOG_AT_LEVEL(INFO) << "test statistics threshold " << d_threshold;
LOG_AT_LEVEL(INFO) << "code phase " << d_code_phase;
LOG_AT_LEVEL(INFO) << "doppler " << d_doppler_freq;
LOG_AT_LEVEL(INFO) << "magnitude " << d_mag;
LOG_AT_LEVEL(INFO) << "input signal power " << d_input_power;
}
else
{
LOG_AT_LEVEL(INFO) << "negative acquisition";
LOG_AT_LEVEL(INFO) << "satellite " << d_satellite;
LOG_AT_LEVEL(INFO) << "sample_stamp " << d_sample_counter;
LOG_AT_LEVEL(INFO) << "test statistics value "
<< d_test_statistics;
LOG_AT_LEVEL(INFO) << "test statistics threshold " << d_threshold;
LOG_AT_LEVEL(INFO) << "magnitude " << d_mag;
LOG_AT_LEVEL(INFO) << "input signal power " << d_input_power;
//restart acquisition variables
d_input_power = 0.0;
d_mag = 0.0;
}
d_active = false;
if (positive_acquisition)
{
acquisition_message = 1;
}
else
{
acquisition_message = 2;
}
d_channel_internal_queue->push(acquisition_message);
consume_each(1);
}
return 0;
}

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/*!
* \file gps_l1_ca_pcps_acquisition_cc.h
* \brief Brief description of the file here
* \author Javier Arribas, 2011. jarribas(at)cttc.es
* Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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_PCPS_ACQUISITION_A_CC_H
#define GPS_L1_CA_PCPS_ACQUISITION_A_CC_H
#include <fstream>
#include <gnuradio/gr_block.h>
#include <gnuradio/gr_msg_queue.h>
#include <gnuradio/gr_complex.h>
#include <gnuradio/gri_fft.h>
#include <queue>
#include <boost/thread/mutex.hpp>
#include <boost/thread/thread.hpp>
#include "concurrent_queue.h"
class gps_l1_ca_pcps_acquisition_cc;
typedef boost::shared_ptr<gps_l1_ca_pcps_acquisition_cc>
gps_l1_ca_pcps_acquisition_cc_sptr;
gps_l1_ca_pcps_acquisition_cc_sptr
gps_l1_ca_pcps_make_acquisition_cc(unsigned int sampled_ms,
unsigned int doppler_max, long freq, long fs_in, int samples_per_ms,
gr_msg_queue_sptr queue, bool dump, std::string dump_filename);
class gps_l1_ca_pcps_acquisition_cc: public gr_block
{
private:
friend gps_l1_ca_pcps_acquisition_cc_sptr
gps_l1_ca_pcps_make_acquisition_cc(unsigned int sampled_ms,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, gr_msg_queue_sptr queue, bool dump,
std::string dump_filename);
gps_l1_ca_pcps_acquisition_cc(unsigned int sampled_ms,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, gr_msg_queue_sptr queue, bool dump,
std::string dump_filename);
void calculate_magnitudes(gr_complex* fft_begin, int doppler_shift,
int doppler_offset);
long d_fs_in;
long d_freq;
int d_samples_per_ms;
unsigned int d_doppler_resolution;
unsigned int d_satellite;
float d_threshold;
std::string d_satellite_str;
unsigned int d_doppler_max;
unsigned int d_doppler_step;
unsigned int d_sampled_ms;
unsigned int d_fft_size;
unsigned long int d_sample_counter;
unsigned long int d_acq_sample_stamp;
gr_complex* d_sine_if;
gr_complex* d_fft_codes;
gri_fft_complex* d_fft_if;
gri_fft_complex* d_ifft;
unsigned int d_code_phase;
float d_doppler_freq;
float d_mag;
float d_input_power;
float d_test_statistics;
gr_msg_queue_sptr d_queue;
concurrent_queue<int> *d_channel_internal_queue;
std::ofstream d_dump_file;
bool d_active;
bool d_dump;
unsigned int d_channel;
std::string d_dump_filename;
public:
~gps_l1_ca_pcps_acquisition_cc();
signed int prn_code_phase();
float doppler_freq()
{
return d_doppler_freq;
}
unsigned int mag()
{
return d_mag;
}
unsigned long int get_sample_stamp()
{
return d_acq_sample_stamp;
}
void set_satellite(unsigned int satellite);
void set_active(bool active)
{
d_active = active;
}
void set_channel(unsigned int channel)
{
d_channel = channel;
}
void set_threshold(float threshold)
{
d_threshold = threshold;
}
void set_doppler_max(unsigned int doppler_max)
{
d_doppler_max = doppler_max;
}
void set_doppler_step(unsigned int doppler_step)
{
d_doppler_step = doppler_step;
}
void set_channel_queue(concurrent_queue<int> *channel_internal_queue)
{
d_channel_internal_queue = channel_internal_queue;
}
int general_work(int noutput_items, gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif /* GPS_L1_CA_PCPS_ACQUISITION_CC_H*/

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/*!
* \file gps_l1_ca_tong_pcps_acquisition_cc.cc
* \brief Brief description of the file here
* \author Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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/>.
*
* -------------------------------------------------------------------------
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gps_l1_ca_tong_pcps_acquisition_cc.h"
#include "gps_sdr_signal_processing.h"
#include "control_message_factory.h"
#include "gps_sdr_x86.h"
#include <gnuradio/gr_io_signature.h>
#include <sstream>
#include <glog/log_severity.h>
#include <glog/logging.h>
using google::LogMessage;
gps_l1_ca_tong_pcps_acquisition_cc_sptr gps_l1_ca_tong_pcps_make_acquisition_cc(
unsigned int sampled_ms, unsigned int doppler_max, long freq,
long fs_in, int samples_per_ms, gr_msg_queue_sptr queue, bool dump,
std::string dump_filename)
{
return gps_l1_ca_tong_pcps_acquisition_cc_sptr(
new gps_l1_ca_tong_pcps_acquisition_cc(sampled_ms, doppler_max,
freq, fs_in, samples_per_ms, queue, dump, dump_filename));
}
gps_l1_ca_tong_pcps_acquisition_cc::gps_l1_ca_tong_pcps_acquisition_cc(
unsigned int sampled_ms, unsigned int doppler_max, long freq,
long fs_in, int samples_per_ms, gr_msg_queue_sptr queue, bool dump,
std::string dump_filename) :
gr_block("gps_l1_ca_tong_pcps_acquisition_cc", gr_make_io_signature(1, 1,
sizeof(gr_complex) * samples_per_ms), gr_make_io_signature(0, 0,
sizeof(gr_complex) * samples_per_ms))
{
// SAMPLE COUNTER
d_sample_counter = 0;
d_active = false;
d_dump = dump;
d_queue = queue;
d_dump_filename = dump_filename;
d_freq = freq;
d_fs_in = fs_in;
d_samples_per_ms = samples_per_ms;
d_sampled_ms = sampled_ms;
d_doppler_max = doppler_max;
d_satellite = 0;
d_samples = d_sampled_ms * d_samples_per_ms;
d_doppler_freq = 0.0;
d_code_phase = 0;
d_mag = 0.0;
d_noise_power = 0.0;
d_fbins = 0;
d_doppler = 0;
d_pfa = 0.2;
d_A = 8;
d_B = 1;
d_max_dwells = 15;
d_K = d_B;
d_if_sin = new gr_complex[d_samples];
d_fft_codes = (gr_complex*)malloc(sizeof(gr_complex) * d_samples_per_ms);
// Direct FFT
d_fft_if = new gri_fft_complex(d_samples, true);
// Inverse FFT
d_ifft = new gri_fft_complex(d_samples, false);
d_ca_codes = new gr_complex[d_samples];
d_aux_ca_code = new gr_complex[d_samples];
//generates a unused PRN code to calculate the noise envelope
code_gen_complex_sampled(d_aux_ca_code, 33, d_fs_in, 0);
DLOG(INFO) << "fs in " << d_fs_in;
DLOG(INFO) << "samples per ms " << d_samples_per_ms;
DLOG(INFO) << "doppler max " << d_doppler_max;
DLOG(INFO) << "freq " << d_freq;
DLOG(INFO) << "satellite " << d_satellite;
DLOG(INFO) << "sampled_ms " << d_sampled_ms;
DLOG(INFO) << "Samples_for_processing " << d_samples;
DLOG(INFO) << "dump filename " << d_dump_filename;
DLOG(INFO) << "dump " << d_dump;
}
gps_l1_ca_tong_pcps_acquisition_cc::~gps_l1_ca_tong_pcps_acquisition_cc()
{
delete d_if_sin;
delete d_ca_codes;
if (d_dump)
{
d_dump_file.close();
}
}
void gps_l1_ca_tong_pcps_acquisition_cc::set_satellite(unsigned int satellite)
{
d_satellite = satellite;
d_code_phase = 0;
d_doppler_freq = 0;
d_mag = 0.0;
d_noise_power = 0.0;
// The GPS codes are generated on the fly using a custom version of the GPS code generator
code_gen_complex_sampled(d_fft_if->get_inbuf(), satellite, d_fs_in, 0);
d_fft_if->execute(); // We need the FFT of GPS C/A code
//Conjugate the local code
//TODO Optimize it !
for (unsigned int i = 0; i < d_samples; i++)
{
d_fft_codes[i] = std::complex<float>(
d_fft_if->get_outbuf()[i].real(),
-d_fft_if->get_outbuf()[i].imag());
}
}
signed int gps_l1_ca_tong_pcps_acquisition_cc::prn_code_phase()
{
return d_code_phase;
}
int gps_l1_ca_tong_pcps_acquisition_cc::general_work(int noutput_items,
gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
if (!d_active)
{
// sample counter
d_sample_counter += d_samples * noutput_items;
consume_each(noutput_items);
}
else
{
d_sample_counter += d_samples;
// initialize acquisition algorithm
bool positive_acquisition = false;
int acquisition_message = -1; //0=STOP_CHANNEL 1=ACQ_SUCCEES 2=ACQ_FAIL
//float noise_envelope = 0.0;
float vt = 20000;
//float peak = 0.0;
float magt = 0.0;
unsigned int max_freq_step = 2 * (unsigned int)(d_doppler_max
/ d_doppler_step);
unsigned int indext = 0;
// Get the input samples pointer
const gr_complex *in = (const gr_complex *)input_items[0];
// aux vars
std::stringstream filename;
//unsigned int consume_items = 1;
// complex file write
// std::streamsize n = 2 * sizeof(float) * (d_samples);
// 1 - Compute the input noise envelope estimation and the threshold vt
// sine_gen_complex( d_if_sin, d_freq + doppler, d_fs_in, d_samples );
//
// noise_envelope = calculate_envelope( in, d_aux_ca_code, d_if_sin );
// vt = noise_envelope * sqrt( -2 * log( d_pfa ) );
// 1º Compute the input signal power estimation
for (unsigned int i = 0; i < d_samples; i++)
{
d_noise_power += std::abs(in[i]);
}
d_noise_power = sqrt(d_noise_power / (float)d_samples);
//Perform the carrier wipe-off
sine_gen_complex(d_if_sin, d_freq + d_doppler, d_fs_in, d_samples);
for (unsigned int i = 0; i < d_samples; i++)
{
d_fft_if->get_inbuf()[i] = in[i] * d_if_sin[i];
}
//3º- Perform the FFT-based circular convolution (parallel time search)
d_fft_if->execute(); //TODO Optimize me
for (unsigned int i = 0; i < d_samples; i++)
{
d_ifft->get_inbuf()[i] = d_fft_if->get_outbuf()[i]
* d_fft_codes[i];
}
d_ifft->execute();
x86_gr_complex_mag(d_ifft->get_outbuf(), d_samples); // d_ifft->get_outbuf()=|abs(·)|^2 and the array is converted from CPX->Float
x86_float_max((float*)d_ifft->get_outbuf(), &d_indext, &magt,
d_samples); // find max of |abs(·)|^2 -> index and magt
magt = sqrt(magt) / (float)d_samples;
d_test_statistics = magt / d_noise_power;
LOG_AT_LEVEL(INFO) << "Channel: " << d_channel
<< ", doing Tong PCSS acquisition of satellite: "
<< d_satellite << ", sample stamp: " << d_sample_counter
<< ", bin_freq " << d_doppler << ", doppler_max: "
<< d_doppler_max << ", K " << d_K << ", sigma: "
<< d_noise_power << ", mag: " << d_test_statistics
<< ", vt: " << vt;
if ((d_test_statistics > vt) && (indext = d_indext))
{
d_K++;
if (d_K == d_A)
{
d_code_phase = d_indext;
positive_acquisition = true;
d_doppler_freq = d_doppler;
d_acq_sample_stamp = d_sample_counter;
LOG_AT_LEVEL(INFO) << "positive acquisition";
LOG_AT_LEVEL(INFO) << "satellite " << d_satellite;
LOG_AT_LEVEL(INFO) << "sample_stamp " << d_sample_counter;
LOG_AT_LEVEL(INFO) << "test statistics value "
<< d_test_statistics;
LOG_AT_LEVEL(INFO) << "test statistics threshold " << vt;
LOG_AT_LEVEL(INFO) << "code phase " << d_code_phase;
LOG_AT_LEVEL(INFO) << "doppler " << d_doppler_freq;
LOG_AT_LEVEL(INFO) << "magnitude " << magt;
LOG_AT_LEVEL(INFO) << "input signal power " << d_noise_power;
d_dwells = 0;
d_active = false;
}
else d_dwells++;
}
else
{
d_K--;
if ((d_K == 0) || (d_dwells > d_max_dwells))
{
d_K = d_B;
d_dwells = 0;
d_fbins++;
if (d_fbins > max_freq_step)
{
d_fbins = 0;
LOG_AT_LEVEL(INFO) << "negative acquisition";
LOG_AT_LEVEL(INFO) << "satellite " << d_satellite;
LOG_AT_LEVEL(INFO) << "sample_stamp" << d_sample_counter;
LOG_AT_LEVEL(INFO) << "test statistics value "
<< d_test_statistics;
LOG_AT_LEVEL(INFO) << "test statistics threshold " << vt;
LOG_AT_LEVEL(INFO) << "input signal power "
<< d_noise_power;
d_active = false;
}
else
{
d_doppler = d_doppler + pow(-1, d_fbins + 1) * d_fbins
* d_doppler_step;
}
}
else d_dwells++;
}
// Record results to files
// if( d_dump )
// {
// filename.str( "" );
// filename << "./data/fft_" << doppler << "_.dat";
// std::cout << filename.str().c_str();
// std::cout << ".\n";
// d_dump_file.open( filename.str().c_str(), std::ios::out
// | std::ios::binary );
// d_dump_file.write( (char*) d_ifft->get_outbuf(), n ); //write directly |abs(·)|^2 in this Doppler bin
// d_dump_file.close();
// }
if (d_active == false)
{
if (positive_acquisition)
{
acquisition_message = 1;
}
else
{
acquisition_message = 2;
}
d_channel_internal_queue->push(acquisition_message);
}
consume_each(1);
}
return 0;
}
float gps_l1_ca_tong_pcps_acquisition_cc::calculate_envelope(
const gr_complex* _input_signal, std::complex<float>* _local_code,
std::complex<float>* _local_if_sin)
{
float mag = 0.0;
std::complex<float> tmp_cpx = 0.0;
//std::cout << "tmp_cpx " << tmp_cpx << std::endl;
for (unsigned int i = 0; i < d_samples; i++)
{
tmp_cpx = tmp_cpx + _input_signal[i] * _local_code[i]
* _local_if_sin[i];
}
//std::cout << "tmp_cpx " << tmp_cpx << std::endl;
mag = abs(tmp_cpx);
return mag;
}

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/*!
* \file gps_l1_ca_tong_pcps_acquisition_cc.h
* \brief Brief description of the file here
* \author Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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_TONG_PCPS_ACQUISITION_CC_H
#define GPS_L1_CA_TONG_PCPS_ACQUISITION_CC_H
#include <fstream>
#include <gnuradio/gr_block.h>
#include <gnuradio/gr_msg_queue.h>
#include <gnuradio/gr_complex.h>
#include <gnuradio/gri_fft.h>
#include <queue>
#include <boost/thread/mutex.hpp>
#include <boost/thread/thread.hpp>
#include "concurrent_queue.h"
class gps_l1_ca_tong_pcps_acquisition_cc;
typedef boost::shared_ptr<gps_l1_ca_tong_pcps_acquisition_cc>
gps_l1_ca_tong_pcps_acquisition_cc_sptr;
gps_l1_ca_tong_pcps_acquisition_cc_sptr
gps_l1_ca_tong_pcps_make_acquisition_cc(unsigned int sampled_ms,
unsigned int doppler_max, long freq, long fs_in, int samples_per_ms,
gr_msg_queue_sptr queue, bool dump, std::string dump_filename);
class gps_l1_ca_tong_pcps_acquisition_cc: public gr_block
{
private:
friend gps_l1_ca_tong_pcps_acquisition_cc_sptr
gps_l1_ca_tong_pcps_make_acquisition_cc(unsigned int sampled_ms,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, gr_msg_queue_sptr queue, bool dump,
std::string dump_filename);
gps_l1_ca_tong_pcps_acquisition_cc(unsigned int sampled_ms,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, gr_msg_queue_sptr queue, bool dump,
std::string dump_filename);
long d_fs_in;
long d_freq;
long d_doppler;
int d_samples_per_ms;
unsigned int d_doppler_resolution;
unsigned int d_satellite;
std::string d_satellite_str;
unsigned int d_doppler_max;
unsigned int d_doppler_step;
unsigned int d_sampled_ms;
unsigned int d_samples;
unsigned long int d_sample_counter;
unsigned long int d_acq_sample_stamp;
unsigned int d_fbins;
unsigned int d_indext;
unsigned d_dwells;
float d_pfa;
unsigned int d_A;
unsigned int d_B;
unsigned int d_max_dwells;
unsigned int d_K;
gr_complex* d_if_sin;
gr_complex* d_fft_codes;
gri_fft_complex* d_fft_if;
gri_fft_complex* d_ifft;
gr_complex* d_ca_codes;
gr_complex* d_aux_ca_code;
unsigned int d_code_phase;
float d_doppler_freq;
float d_mag;
float d_noise_power;
float d_test_statistics;
gr_msg_queue_sptr d_queue;
concurrent_queue<int> *d_channel_internal_queue;
std::ofstream d_dump_file;
bool d_active;
bool d_dump;
unsigned int d_channel;
std::string d_dump_filename;
public:
~gps_l1_ca_tong_pcps_acquisition_cc();
signed int prn_code_phase();
float doppler_freq()
{
return d_doppler_freq;
}
unsigned int mag()
{
return d_mag;
}
unsigned long int get_sample_stamp()
{
return d_acq_sample_stamp;
}
void set_satellite(unsigned int satellite);
void set_active(bool active)
{
d_active = active;
}
void set_channel(unsigned int channel)
{
d_channel = channel;
}
void set_doppler_max(unsigned int doppler_max)
{
d_doppler_max = doppler_max;
}
void set_doppler_step(unsigned int doppler_step)
{
d_doppler_step = doppler_step;
}
void set_doppler(unsigned int doppler)
{
d_doppler = doppler;
}
void set_dwells(unsigned int dwells)
{
d_dwells = dwells;
}
float calculate_envelope(const gr_complex* _input_signal, std::complex<
float>* _local_code, std::complex<float>* _local_if_sin);
void set_channel_queue(concurrent_queue<int> *channel_internal_queue)
{
d_channel_internal_queue = channel_internal_queue;
}
int general_work(int noutput_items, gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif /* GPS_L1_CA_TONG_PCPS_ACQUISITION_CC_H*/

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project : build-dir ../../../../build ;
obj gps_l1_ca_gps_sdr_acquisition_cc : gps_l1_ca_gps_sdr_acquisition_cc.cc ;
obj gps_l1_ca_gps_sdr_acquisition_ss : gps_l1_ca_gps_sdr_acquisition_ss.cc ;
obj gps_l1_ca_pcps_acquisition_cc : gps_l1_ca_pcps_acquisition_cc.cc ;
obj gps_l1_ca_tong_pcps_acquisition_cc : gps_l1_ca_tong_pcps_acquisition_cc.cc ;

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build-project adapters ;
build-project gnuradio_blocks ;

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/*!
* \file channel.cc
* \brief Implementation of a GPS_L1_CA_Channel with a Finite State Machine
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
* Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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/>.
*
* -------------------------------------------------------------------------
*/
#include "channel.h"
#include "acquisition_interface.h"
#include "tracking_interface.h"
#include "telemetry_decoder_interface.h"
#include "configuration_interface.h"
#include "gnss_flowgraph.h"
#include <iostream>
#include <sstream>
#include <boost/lexical_cast.hpp>
#include <gnuradio/gr_io_signature.h>
#include <gnuradio/gr_message.h>
#include <glog/log_severity.h>
#include <glog/logging.h>
using google::LogMessage;
//! Constructor
Channel::Channel(ConfigurationInterface *configuration, unsigned int channel,
GNSSBlockInterface *pass_through, AcquisitionInterface *acq,
TrackingInterface *trk, TelemetryDecoderInterface *nav,
std::string role, std::string implementation, gr_msg_queue_sptr queue) :
pass_through_(pass_through), acq_(acq), trk_(trk), nav_(nav),
role_(role), implementation_(implementation), channel_(channel),
queue_(queue)
{
stop_ = false;
acq_->set_channel(channel_);
trk_->set_channel(channel_);
nav_->set_channel(channel_);
acq_->set_threshold(configuration->property("Acquisition"
+ boost::lexical_cast<std::string>(channel_) + ".threshold", 0.0));
acq_->set_doppler_max(configuration->property("Acquisition"
+ boost::lexical_cast<std::string>(channel_) + ".doppler_max",
10000));
acq_->set_doppler_step(configuration->property("Acquisition"
+ boost::lexical_cast<std::string>(channel_) + ".doppler_step",
250));
repeat_ = configuration->property("Acquisition" + boost::lexical_cast<
std::string>(channel_) + ".repeat_satellite", false);
std::cout << "Channel " << channel_ << " satellite repeat = " << repeat_
<< std::endl;
acq_->set_channel_queue(&channel_internal_queue_);
trk_->set_channel_queue(&channel_internal_queue_);
channel_fsm_.set_acquisition(acq_);
channel_fsm_.set_tracking(trk_);
channel_fsm_.set_channel(channel_);
channel_fsm_.set_queue(queue_);
connected_ = false;
message_ = 0;
}
//! Destructor
Channel::~Channel()
{
delete acq_;
delete trk_;
delete nav_;
delete pass_through_;
}
void Channel::connect(gr_top_block_sptr top_block)
{
if (connected_)
{
LOG_AT_LEVEL(WARNING) << "channel already connected internally";
return;
}
pass_through_->connect(top_block);
acq_->connect(top_block);
trk_->connect(top_block);
nav_->connect(top_block);
top_block->connect(pass_through_->get_right_block(), 0,
acq_->get_left_block(), 0);
DLOG(INFO) << "pass_through_ -> acquisition";
top_block->connect(pass_through_->get_right_block(), 0,
trk_->get_left_block(), 0);
DLOG(INFO) << "pass_through_ -> tracking";
top_block->connect(trk_->get_right_block(), 0, nav_->get_left_block(), 0); // channel 1
top_block->connect(trk_->get_right_block(), 1, nav_->get_left_block(), 1); // channel 2
top_block->connect(trk_->get_right_block(), 2, nav_->get_left_block(), 2); // channel 3
DLOG(INFO) << "tracking -> telemetry_decoder";
connected_ = true;
}
void Channel::disconnect(gr_top_block_sptr top_block)
{
if (!connected_)
{
LOG_AT_LEVEL(WARNING) << "Channel already disconnected internally";
return;
}
top_block->disconnect(acq_->get_right_block(), 0, trk_->get_left_block(),
0);
top_block->disconnect(trk_->get_right_block(), 0, nav_->get_left_block(),
0);
acq_->disconnect(top_block);
trk_->disconnect(top_block);
nav_->disconnect(top_block);
connected_ = false;
}
gr_basic_block_sptr Channel::get_left_block()
{
return pass_through_->get_left_block();
}
gr_basic_block_sptr Channel::get_right_block()
{
return nav_->get_right_block();
}
void Channel::set_satellite(unsigned int satellite)
{
satellite_ = satellite;
acq_->set_satellite(satellite);
trk_->set_satellite(satellite);
nav_->set_satellite(satellite);
}
void Channel::start_acquisition()
{
channel_fsm_.Event_gps_start_acquisition();
}
void Channel::start()
{
ch_thread_ = boost::thread(&Channel::run, this);
}
void Channel::run()
{
start_acquisition();
while (!stop_)
{
channel_internal_queue_.wait_and_pop(message_);
process_channel_messages();
}
}
/*
* \brief Set stop_ to true and blocks the calling thread until
* the thread of the constructor has completed
*/
void Channel::stop()
{
stop_ = true;
channel_internal_queue_.push(0); //message to stop channel
/* When the boost::thread object that represents a thread of execution
* is destroyed the thread becomes detached. Once a thread is detached,
* it will continue executing until the invocation of the function or
* callable object supplied on construction has completed,
* or the program is terminated. In order to wait for a thread of
* execution to finish, the join() or timed_join() member functions of
* the boost::thread object must be used. join() will block the calling
* thread until the thread represented by the boost::thread object
* has completed.
*
*/
ch_thread_.join();
}
void Channel::process_channel_messages()
{
switch (message_)
{
case 0:
LOG_AT_LEVEL(INFO) << "Stop channel " << channel_;
break;
case 1:
LOG_AT_LEVEL(INFO) << "Channel " << channel_
<< " ACQ SUCCESS satellite " << satellite_;
channel_fsm_.Event_gps_valid_acquisition();
break;
case 2:
LOG_AT_LEVEL(INFO) << "Channel " << channel_
<< " ACQ FAILED satellite " << satellite_;
if (repeat_ == true)
{
channel_fsm_.Event_gps_failed_acquisition_repeat();
}
else
{
channel_fsm_.Event_gps_failed_acquisition_no_repeat();
}
break;
case 3:
LOG_AT_LEVEL(INFO) << "Channel " << channel_
<< " TRACKING FAILED satellite " << satellite_
<< ", reacquisition.";
channel_fsm_.Event_gps_failed_tracking();
break;
default:
LOG_AT_LEVEL(WARNING) << "Default case, invalid message.";
break;
}
}

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/*!
* \file channel.h
* \brief This class represents a GNSS channel.
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
* Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* It holds blocks for acquisition, tracking,
* navigation data extraction and pseudorange calculation.
*
* -------------------------------------------------------------------------
*
* 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 CHANNEL_H_
#define CHANNEL_H_
#include <gnuradio/gr_null_sink.h>
#include <gnuradio/gr_msg_queue.h>
#include "channel_interface.h"
#include "gps_l1_ca_channel_fsm.h"
#include "control_message_factory.h"
#include "concurrent_queue.h"
class ConfigurationInterface;
class AcquisitionInterface;
class TrackingInterface;
class TelemetryDecoderInterface;
//class GpsL1CaChannelFsm;
/*!
* \brief This class represents a GNSS channel.
*
*/
class Channel: public ChannelInterface
{
public:
//! Constructor
Channel(ConfigurationInterface *configuration, unsigned int channel,
GNSSBlockInterface *pass_through, AcquisitionInterface *acq,
TrackingInterface *trk, TelemetryDecoderInterface *nav,
std::string role, std::string implementation,
gr_msg_queue_sptr queue);
//! Virtual destructor
virtual ~Channel();
void connect(gr_top_block_sptr top_block);
void disconnect(gr_top_block_sptr top_block);
gr_basic_block_sptr get_left_block();
gr_basic_block_sptr get_right_block();
std::string role(){ return role_;}
std::string implementation(){ return "Channel";}
size_t item_size(){ return 0;}
unsigned int satellite(){ return satellite_;}
AcquisitionInterface* acquisition(){ return acq_;}
TrackingInterface* tracking(){ return trk_;}
TelemetryDecoderInterface* telemetry(){ return nav_;}
void start_acquisition();
void set_satellite(unsigned int satellite);
void start();
void stop();
private:
GNSSBlockInterface *pass_through_;
AcquisitionInterface *acq_;
TrackingInterface *trk_;
TelemetryDecoderInterface *nav_;
std::string role_;
std::string implementation_;
unsigned int channel_;
unsigned int satellite_;
bool connected_;
bool stop_;
int message_;
bool repeat_;
GpsL1CaChannelFsm channel_fsm_;
gr_msg_queue_sptr queue_;
concurrent_queue<int> channel_internal_queue_;
boost::thread ch_thread_;
void run();
void process_channel_messages();
};
#endif /*CHANNEL_H_*/

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project : build-dir ../../../../build ;
obj channel : channel.cc ;

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build-project adapters ;
# build-project gnuradio_blocks ;
build-project libs ;

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/*!
* \file gps_l1_ca_channel_fsm.cc
* \briefState Machine for channel using boost::statechart
* \author Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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/>.
*
* -------------------------------------------------------------------------
*/
#include "gps_l1_ca_channel_fsm.h"
#include "control_message_factory.h"
#include "channel.h"
#include <glog/log_severity.h>
#include <glog/logging.h>
struct Ev_gps_channel_start_acquisition: sc::event<
Ev_gps_channel_start_acquisition>
{};
struct Ev_gps_channel_valid_acquisition: sc::event<
Ev_gps_channel_valid_acquisition>
{};
struct Ev_gps_channel_failed_acquisition_repeat: sc::event<
Ev_gps_channel_failed_acquisition_repeat>
{};
struct Ev_gps_channel_failed_acquisition_no_repeat: sc::event<
Ev_gps_channel_failed_acquisition_no_repeat>
{};
struct Ev_gps_channel_failed_tracking: sc::event<
Ev_gps_channel_failed_tracking>
{};
struct gps_channel_idle_fsm_S0: public sc::state<gps_channel_idle_fsm_S0,
GpsL1CaChannelFsm>
{
public:
// sc::transition(event, next state)
typedef sc::transition<Ev_gps_channel_start_acquisition,
gps_channel_acquiring_fsm_S1> reactions;
gps_channel_idle_fsm_S0(my_context ctx) :
my_base(ctx)
{
//std::cout << "Enter Channel_Idle_S0 " << std::endl;
}
};
struct gps_channel_acquiring_fsm_S1: public sc::state<
gps_channel_acquiring_fsm_S1, GpsL1CaChannelFsm>
{
public:
typedef mpl::list<sc::transition<
Ev_gps_channel_failed_acquisition_no_repeat,
gps_channel_waiting_fsm_S3>, sc::transition<
Ev_gps_channel_failed_acquisition_repeat,
gps_channel_acquiring_fsm_S1>, sc::transition<
Ev_gps_channel_valid_acquisition, gps_channel_tracking_fsm_S2> >
reactions;
gps_channel_acquiring_fsm_S1(my_context ctx) :
my_base(ctx)
{
//std::cout << "Enter Channel_Acq_S1 " << std::endl;
context<GpsL1CaChannelFsm> ().start_acquisition();
}
};
struct gps_channel_tracking_fsm_S2: public sc::state<
gps_channel_tracking_fsm_S2, GpsL1CaChannelFsm>
{
public:
typedef sc::transition<Ev_gps_channel_failed_tracking,
gps_channel_acquiring_fsm_S1> reactions;
gps_channel_tracking_fsm_S2(my_context ctx) :
my_base(ctx)
{
//std::cout << "Enter Channel_tracking_S2 " << std::endl;
context<GpsL1CaChannelFsm> ().start_tracking();
}
};
struct gps_channel_waiting_fsm_S3: public sc::state<
gps_channel_waiting_fsm_S3, GpsL1CaChannelFsm>
{
public:
typedef sc::transition<Ev_gps_channel_start_acquisition,
gps_channel_acquiring_fsm_S1> reactions;
gps_channel_waiting_fsm_S3(my_context ctx) :
my_base(ctx)
{
//std::cout << "Enter Channel_waiting_S3 " << std::endl;
context<GpsL1CaChannelFsm> ().request_satellite();
}
};
GpsL1CaChannelFsm::GpsL1CaChannelFsm()
{
initiate(); //start the FSM
}
GpsL1CaChannelFsm::GpsL1CaChannelFsm(AcquisitionInterface *acquisition) :
acq_(acquisition)
{
initiate(); //start the FSM
}
void GpsL1CaChannelFsm::Event_gps_start_acquisition()
{
this->process_event(Ev_gps_channel_start_acquisition());
}
void GpsL1CaChannelFsm::Event_gps_valid_acquisition()
{
this->process_event(Ev_gps_channel_valid_acquisition());
}
void GpsL1CaChannelFsm::Event_gps_failed_acquisition_repeat()
{
this->process_event(Ev_gps_channel_failed_acquisition_repeat());
}
void GpsL1CaChannelFsm::Event_gps_failed_acquisition_no_repeat()
{
this->process_event(Ev_gps_channel_failed_acquisition_no_repeat());
}
void GpsL1CaChannelFsm::Event_gps_failed_tracking()
{
this->process_event(Ev_gps_channel_failed_tracking());
}
void GpsL1CaChannelFsm::set_acquisition(AcquisitionInterface *acquisition)
{
acq_ = acquisition;
}
void GpsL1CaChannelFsm::set_tracking(TrackingInterface *tracking)
{
trk_ = tracking;
}
void GpsL1CaChannelFsm::set_queue(gr_msg_queue_sptr queue)
{
queue_ = queue;
}
void GpsL1CaChannelFsm::set_channel(unsigned int channel)
{
channel_ = channel;
}
void GpsL1CaChannelFsm::start_acquisition()
{
acq_->reset();
}
void GpsL1CaChannelFsm::start_tracking()
{
LOG_AT_LEVEL(INFO) << "Channel " << channel_
<< " passing prn code phase " << acq_->prn_code_phase();
LOG_AT_LEVEL(INFO) << "Channel " << channel_
<< " passing doppler freq shift " << acq_->doppler_freq_shift();
LOG_AT_LEVEL(INFO) << "Channel " << channel_
<< " passing acquisition sample stamp "
<< acq_->get_sample_stamp();
trk_->set_prn_code_phase(acq_->prn_code_phase());
trk_->set_doppler_freq_shift(acq_->doppler_freq_shift());
trk_->set_acq_sample_stamp(acq_->get_sample_stamp());
trk_->start_tracking();
}
void GpsL1CaChannelFsm::request_satellite()
{
ControlMessageFactory* cmf = new ControlMessageFactory();
if (queue_ != gr_msg_queue_sptr())
{
queue_->handle(cmf->GetQueueMessage(channel_, 0));
}
delete cmf;
}

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/*!
* \file gps_l1_ca_channel_fsm.h
* \brief State Machine for channel using boost::statechart
* \author Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
*
* -------------------------------------------------------------------------
*
* 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 GNSS_SDR_GPS_L1_CA_CHANNEL_FSM_H
#define GNSS_SDR_GPS_L1_CA_CHANNEL_FSM_H
#include <boost/statechart/state_machine.hpp>
#include <boost/statechart/simple_state.hpp>
#include <boost/statechart/state.hpp>
#include <boost/statechart/transition.hpp>
#include <boost/statechart/custom_reaction.hpp>
#include <boost/mpl/list.hpp>
#include <queue>
#include <boost/thread/mutex.hpp>
#include <boost/thread/thread.hpp>
#include "acquisition_interface.h"
#include "tracking_interface.h"
#include "telemetry_decoder_interface.h"
#include <gnuradio/gr_msg_queue.h>
#include <iostream>
#include <cstring>
namespace sc = boost::statechart;
namespace mpl = boost::mpl;
struct gps_channel_idle_fsm_S0;
struct gps_channel_acquiring_fsm_S1;
struct gps_channel_tracking_fsm_S2;
struct gps_channel_waiting_fsm_S3;
/*!
* \brief This class implements a State Machine for channel using boost::statechart
*/
class GpsL1CaChannelFsm: public sc::state_machine<GpsL1CaChannelFsm,
gps_channel_idle_fsm_S0>
{
public:
GpsL1CaChannelFsm();
GpsL1CaChannelFsm(AcquisitionInterface *acquisition);
void set_acquisition(AcquisitionInterface *acquisition);
void set_tracking(TrackingInterface *tracking);
void set_queue(gr_msg_queue_sptr queue);
void set_channel(unsigned int channel);
void start_acquisition();
void start_tracking();
void request_satellite();
//FSM EVENTS
void Event_gps_start_acquisition();
void Event_gps_valid_acquisition();
void Event_gps_failed_acquisition_repeat();
void Event_gps_failed_acquisition_no_repeat();
void Event_gps_failed_tracking();
private:
AcquisitionInterface *acq_;
TrackingInterface *trk_;
TelemetryDecoderInterface *nav_;
gr_msg_queue_sptr queue_;
unsigned int channel_;
};
#endif /*GNSS_SDR_GPS_L1_CA_CHANNEL_FSM_H*/

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project : build-dir ../../../../build ;
obj gps_l1_ca_channel_fsm : gps_l1_ca_channel_fsm.cc ;

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/*!
* \file direct_resampler_conditioner.cc
* \brief Brief description of the file here
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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/>.
*
* -------------------------------------------------------------------------
*/
#include "direct_resampler_conditioner.h"
#include <gnuradio/usrp_source_c.h>
#include <gnuradio/gr_file_sink.h>
#include "direct_resampler_conditioner_cc.h"
#include "direct_resampler_conditioner_ss.h"
#include "configuration_interface.h"
#include <glog/log_severity.h>
#include <glog/logging.h>
using google::LogMessage;
DirectResamplerConditioner::DirectResamplerConditioner(
ConfigurationInterface* configuration, std::string role,
unsigned int in_stream, unsigned int out_stream) :
role_(role), in_stream_(in_stream), out_stream_(out_stream)
{
std::string default_item_type = "short";
std::string default_dump_file = "./data/signal_conditioner.dat";
sample_freq_in_ = configuration->property(role_ + ".sample_freq_in",
(double)4000000.0);
sample_freq_out_ = configuration->property(role_ + ".sample_freq_out",
(double)2048000.0);
item_type_ = configuration->property(role + ".item_type",
default_item_type);
dump_ = configuration->property(role + ".dump", false);
dump_filename_ = configuration->property(role + ".dump_filename",
default_dump_file);
if (item_type_.compare("gr_complex") == 0)
{
item_size_ = sizeof(gr_complex);
resampler_ = direct_resampler_make_conditioner_cc(sample_freq_in_,
sample_freq_out_);
}
else if (item_type_.compare("short") == 0)
{
item_size_ = sizeof(short);
resampler_ = direct_resampler_make_conditioner_ss(sample_freq_in_,
sample_freq_out_);
}
else
{
LOG_AT_LEVEL(WARNING) << item_type_
<< " unrecognized item type. Using short";
item_size_ = sizeof(short);
}
if (dump_)
{
DLOG(INFO) << "Dumping output into file " << dump_filename_;
file_sink_ = gr_make_file_sink(item_size_, dump_filename_.c_str());
}
DLOG(INFO) << "sample_freq_in " << sample_freq_in_;
DLOG(INFO) << "sample_freq_out" << sample_freq_out_;
DLOG(INFO) << "Item size " << item_size_;
DLOG(INFO) << "resampler(" << resampler_->unique_id() << ")";
if (dump_)
{
DLOG(INFO) << "file_sink(" << file_sink_->unique_id() << ")";
}
}
DirectResamplerConditioner::~DirectResamplerConditioner()
{
}
void DirectResamplerConditioner::connect(gr_top_block_sptr top_block)
{
if (dump_)
{
top_block->connect(resampler_, 0, file_sink_, 0);
DLOG(INFO) << "connected resampler to file sink";
}
else
{
DLOG(INFO) << "nothing to connect internally";
}
}
void DirectResamplerConditioner::disconnect(gr_top_block_sptr top_block)
{
if (dump_)
{
top_block->disconnect(resampler_, 0, file_sink_, 0);
}
}
gr_basic_block_sptr DirectResamplerConditioner::get_left_block()
{
return resampler_;
}
gr_basic_block_sptr DirectResamplerConditioner::get_right_block()
{
return resampler_;
}

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/*!
* \file direct_resampler_conditioner.h
* \brief This class represents a direct resampler.
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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 DIRECT_RESAMPLER_CONDITIONER_H_
#define DIRECT_RESAMPLER_CONDITIONER_H_
#include <gnuradio/gr_hier_block2.h>
#include "gnss_block_interface.h"
class ConfigurationInterface;
class DirectResamplerConditioner: public GNSSBlockInterface
{
public:
DirectResamplerConditioner(ConfigurationInterface* configuration,
std::string role, unsigned int in_stream,
unsigned int out_stream);
virtual ~DirectResamplerConditioner();
std::string role()
{
return role_;
}
std::string implementation()
{
return "DirectResamplerConditioner";
}
size_t item_size()
{
return item_size_;
}
void connect(gr_top_block_sptr top_block);
void disconnect(gr_top_block_sptr top_block);
gr_basic_block_sptr get_left_block();
gr_basic_block_sptr get_right_block();
private:
std::string role_;
unsigned int in_stream_;
unsigned int out_stream_;
std::string item_type_;
size_t item_size_;
long samples_;
bool dump_;
std::string dump_filename_;
double sample_freq_in_;
double sample_freq_out_;
gr_block_sptr resampler_;
gr_block_sptr file_sink_;
};
#endif /*DIRECT_RESAMPLER_CONDITIONER_H_*/

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project : build-dir ../../../../build ;
obj direct_resampler_conditioner : direct_resampler_conditioner.cc ;

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/*!
* \file direct_resampler_conditioner_cc.cc
* \brief Brief description of the file here
* \author Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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/>.
*
* -------------------------------------------------------------------------
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "direct_resampler_conditioner_cc.h"
#include <iostream>
#include <gnuradio/gr_io_signature.h>
#include <glog/log_severity.h>
#include <glog/logging.h>
using google::LogMessage;
direct_resampler_conditioner_cc_sptr direct_resampler_make_conditioner_cc(
double sample_freq_in, double sample_freq_out)
{
return direct_resampler_conditioner_cc_sptr(
new direct_resampler_conditioner_cc(sample_freq_in,
sample_freq_out));
}
direct_resampler_conditioner_cc::direct_resampler_conditioner_cc(
double sample_freq_in, double sample_freq_out) :
gr_block("direct_resampler_conditioner_cc", gr_make_io_signature(1, 1,
sizeof(gr_complex)), gr_make_io_signature(1, 1,
sizeof(gr_complex))), d_sample_freq_in(sample_freq_in),
d_sample_freq_out(sample_freq_out), d_phase(0), d_lphase(0),
d_history(1)
{
// Computes the phase step multiplying the resampling ratio by 2^32 = 4294967296
if (d_sample_freq_in >= d_sample_freq_out)
{
d_phase_step = (unsigned int)floor((double)4294967296.0
* sample_freq_out / sample_freq_in);
}
else
{
d_phase_step = (unsigned int)floor((double)4294967296.0
* sample_freq_in / sample_freq_out);
}
set_relative_rate(1.0 * sample_freq_out / sample_freq_in);
set_output_multiple(1);
}
direct_resampler_conditioner_cc::~direct_resampler_conditioner_cc()
{
}
void direct_resampler_conditioner_cc::forecast(int noutput_items,
gr_vector_int &ninput_items_required)
{
int nreqd = std::max((unsigned)1, (int)((double)(noutput_items + 1)
* sample_freq_in() / sample_freq_out()) + history() - 1);
unsigned ninputs = ninput_items_required.size();
for (unsigned i = 0; i < ninputs; i++)
{
ninput_items_required[i] = nreqd;
}
}
int direct_resampler_conditioner_cc::general_work(int noutput_items,
gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const gr_complex *in = (const gr_complex *)input_items[0];
gr_complex *out = (gr_complex *)output_items[0];
int lcv = 0;
int count = 0;
if (d_sample_freq_in >= d_sample_freq_out)
{
while ((lcv < noutput_items))
{
if (d_phase <= d_lphase)
{
out[lcv] = *in;
lcv++;
}
d_lphase = d_phase;
d_phase += d_phase_step;
in++;
count++;
}
}
else
{
while ((lcv < noutput_items))
{
d_lphase = d_phase;
d_phase += d_phase_step;
if (d_phase <= d_lphase)
{
in++;
count++;
}
out[lcv] = *in;
lcv++;
}
}
consume_each(std::min(count, ninput_items[0]));
return lcv;
}

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/*!
* \file direct_resampler_conditioner_cc.h
*
* \brief Direct resampler with
* gr_complex input and gr_complex output
* \author Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* Detailed description of the file here if needed.
*
* This block takes in a signal stream and performs direct
* resampling.
*
* The theory behind this block can be found in Chapter 7.5 of
* the following book.
*
* \param sample_freq_in (double) Specifies the sampling frequency of the input signal
* \param sample_freq_out (double) Specifies the sampling frequency of the output signal
*
* -------------------------------------------------------------------------
*
* 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 INCLUDED_DIRECT_RESAMPLER_CONDITIONER_CC_H
#define INCLUDED_DIRECT_RESAMPLER_CONDITIONER_CC_H
#include <gnuradio/gr_block.h>
class direct_resampler_conditioner_cc;
typedef boost::shared_ptr<direct_resampler_conditioner_cc>
direct_resampler_conditioner_cc_sptr;
direct_resampler_conditioner_cc_sptr
direct_resampler_make_conditioner_cc(double sample_freq_in,
double sample_freq_out);
class direct_resampler_conditioner_cc: public gr_block
{
private:
friend direct_resampler_conditioner_cc_sptr
direct_resampler_make_conditioner_cc(double sample_freq_in,
double sample_freq_out);
double d_sample_freq_in;
double d_sample_freq_out;
unsigned int d_phase;
unsigned int d_lphase;
unsigned int d_phase_step;
unsigned int d_history;
direct_resampler_conditioner_cc(double sample_freq_in,
double sample_freq_out);
public:
~direct_resampler_conditioner_cc();
unsigned int sample_freq_in() const
{
return d_sample_freq_in;
}
unsigned int sample_freq_out() const
{
return d_sample_freq_out;
}
void forecast(int noutput_items, gr_vector_int &ninput_items_required);
int general_work(int noutput_items, gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif /* INCLUDED_DIRECT_RESAMPLER_CONDITIONER_CC_H */

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/*!
* \file direct_resampler_conditioner_ss.cc
* \brief Brief description of the file here
* \author Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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/>.
*
* -------------------------------------------------------------------------
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "direct_resampler_conditioner_ss.h"
#include "gps_sdr_signal_processing.h"
#include <iostream>
#include <gnuradio/gr_io_signature.h>
#include <glog/log_severity.h>
#include <glog/logging.h>
using google::LogMessage;
direct_resampler_conditioner_ss_sptr direct_resampler_make_conditioner_ss(
double sample_freq_in, double sample_freq_out)
{
return direct_resampler_conditioner_ss_sptr(
new direct_resampler_conditioner_ss(sample_freq_in,
sample_freq_out));
}
direct_resampler_conditioner_ss::direct_resampler_conditioner_ss(
double sample_freq_in, double sample_freq_out) :
gr_block("direct_resampler_make_conditioner_ss", gr_make_io_signature(1,
1, sizeof(short)), gr_make_io_signature(1, 1, sizeof(short))),
d_sample_freq_in(sample_freq_in), d_sample_freq_out(
sample_freq_out), d_phase(0), d_lphase(0), d_history(1)
{
// Computes the phase step multiplying the resampling ratio by 2^32 = 4294967296
if (d_sample_freq_in >= d_sample_freq_out)
{
d_phase_step = (unsigned int)floor((double)4294967296.0
* sample_freq_out / sample_freq_in);
}
else
{
d_phase_step = (unsigned int)floor((double)4294967296.0
* sample_freq_in / sample_freq_out);
}
set_relative_rate(1.0 * sample_freq_out / sample_freq_in);
set_output_multiple(1);
}
direct_resampler_conditioner_ss::~direct_resampler_conditioner_ss()
{
}
void direct_resampler_conditioner_ss::forecast(int noutput_items,
gr_vector_int &ninput_items_required)
{
int nreqd = std::max((unsigned)1, (int)((double)(noutput_items + 1)
* sample_freq_in() / sample_freq_out()) + history() - 1);
unsigned ninputs = ninput_items_required.size();
for (unsigned i = 0; i < ninputs; i++)
{
ninput_items_required[i] = nreqd;
}
}
int direct_resampler_conditioner_ss::general_work(int noutput_items,
gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const CPX *in = (const CPX *)input_items[0];
CPX *out = (CPX *)output_items[0];
int lcv = 0;
int count = 0;
if (d_sample_freq_in >= d_sample_freq_out)
{
while ((lcv < noutput_items))
{
if (d_phase <= d_lphase)
{
out[lcv] = *in;
lcv++;
}
d_lphase = d_phase;
d_phase += d_phase_step;
in++;
count++;
}
}
else
{
while ((lcv < noutput_items))
{
d_lphase = d_phase;
d_phase += d_phase_step;
if (d_phase <= d_lphase)
{
in++;
count++;
}
out[lcv] = *in;
lcv++;
}
}
consume_each(std::min(count, ninput_items[0]));
return lcv;
}

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/*!
* \file direct_resampler_conditioner_ss.h
* \brief Direct resampler with
* short input and short output
* \author Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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 INCLUDED_DIRECT_RESAMPLER_CONDITIONER_SS_H
#define INCLUDED_DIRECT_RESAMPLER_CONDITIONER_SS_H
#include <gnuradio/gr_block.h>
class direct_resampler_conditioner_ss;
typedef boost::shared_ptr<direct_resampler_conditioner_ss>
direct_resampler_conditioner_ss_sptr;
direct_resampler_conditioner_ss_sptr
direct_resampler_make_conditioner_ss(double sample_freq_in,
double sample_freq_out);
class direct_resampler_conditioner_ss: public gr_block
{
private:
friend direct_resampler_conditioner_ss_sptr
direct_resampler_make_conditioner_ss(double sample_freq_in,
double sample_freq_out);
double d_sample_freq_in;
double d_sample_freq_out;
unsigned int d_phase;
unsigned int d_lphase;
unsigned int d_phase_step;
unsigned int d_history;
direct_resampler_conditioner_ss(double sample_freq_in,
double sample_freq_out);
public:
~direct_resampler_conditioner_ss();
unsigned int sample_freq_in() const
{
return d_sample_freq_in;
}
unsigned int sample_freq_out() const
{
return d_sample_freq_out;
}
void forecast(int noutput_items, gr_vector_int &ninput_items_required);
int general_work(int noutput_items, gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif /* INCLUDED_DIRECT_RESAMPLER_CONDITIONER_SS_H */

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project : build-dir ../../../../build ;
obj direct_resampler_conditioner_cc : direct_resampler_conditioner_cc.cc ;
obj direct_resampler_conditioner_ss : direct_resampler_conditioner_ss.cc ;

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build-project adapters ;
build-project gnuradio_blocks ;

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build-project acquisition ;
build-project channel ;
build-project conditioner ;
build-project libs ;
build-project signal_source ;
build-project tracking ;
build-project telemetry_decoder ;
build-project observables ;
build-project output_filter ;

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/*!
* \file gnss_sdr_valve.cc
* \brief Brief description of the file here
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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/>.
*
* -------------------------------------------------------------------------
*/
#include "gnss_sdr_valve.h"
#include <gnuradio/gr_io_signature.h>
#include "control_message_factory.h"
#include <glog/log_severity.h>
#include <glog/logging.h>
using google::LogMessage;
gnss_sdr_valve::gnss_sdr_valve (size_t sizeof_stream_item,
int nitems,
gr_msg_queue_sptr queue) : gr_sync_block ("valve",
gr_make_io_signature (1, 1, sizeof_stream_item),
gr_make_io_signature (1, 1, sizeof_stream_item)),
d_nitems (nitems), d_ncopied_items (0), d_queue(queue)
{}
gr_block_sptr gnss_sdr_make_valve (size_t sizeof_stream_item,
int nitems,
gr_msg_queue_sptr queue)
{
return gr_block_sptr (new gnss_sdr_valve (sizeof_stream_item, nitems, queue));
}
int gnss_sdr_valve::work (int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
if (d_ncopied_items >= d_nitems)
{
ControlMessageFactory* cmf = new ControlMessageFactory();
d_queue->handle(cmf->GetQueueMessage(200,0));
delete cmf;
return -1; // Done!
}
unsigned n = std::min (d_nitems - d_ncopied_items, noutput_items);
if (n == 0)
return 0;
memcpy (output_items[0], input_items[0], n * input_signature()->sizeof_stream_item (0));
d_ncopied_items += n;
return n;
}

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/*!
* \file gnss_sdr_valve.h
* \brief This class implements a GNU Radio block that sends a STOP message to the
* control queue right after a specific number of samples have passed through it.
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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 GNSS_SDR_VALVE_H_
#define GNSS_SDR_VALVE_H_
#include <cstring>
#include <gr_sync_block.h>
#include <gr_msg_queue.h>
gr_block_sptr gnss_sdr_make_valve (size_t sizeof_stream_item,
int nitems,
gr_msg_queue_sptr queue);
class gnss_sdr_valve : public gr_sync_block
{
friend gr_block_sptr gnss_sdr_make_valve(size_t sizeof_stream_item,
int nitems,
gr_msg_queue_sptr queue);
gnss_sdr_valve (size_t sizeof_stream_item,
int nitems,
gr_msg_queue_sptr queue);
int d_nitems;
int d_ncopied_items;
gr_msg_queue_sptr d_queue;
public:
int work (int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif /*GNSS_SDR_VALVE_H_*/

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/*----------------------------------------------------------------------------------------------*/
/*! \file defines.h
//
// FILENAME: defines.h
//
// DESCRIPTION: Important, non board-specific defines, many associated with IS-GPS-200D.
//
// DEVELOPERS: Gregory W. Heckler (2003-2009)
//
// LICENSE TERMS: Copyright (c) Gregory W. Heckler 2009
//
// This file is part of the GPS Software Defined Radio (GPS-SDR)
//
// The GPS-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 2 of
// the License, or (at your option) any later version. The GPS-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.
//
// Note: Comments within this file follow a syntax that is compatible with
// DOXYGEN and are utilized for automated document extraction
//
// Reference:
*/
/*----------------------------------------------------------------------------------------------*/
#ifndef DEFINES_H_
#define DEFINES_H_
/* For unnamed pipes */
/*----------------------------------------------------------------------------------------------*/
#define READ (0) //!< Read handle
#define WRITE (1) //!< Write handle
#define TRUE (1) //!< True?
#define FALSE (0) //!< False!
/*----------------------------------------------------------------------------------------------*/
/* First make some type prototypes */
/*----------------------------------------------------------------------------------------------*/
typedef unsigned char uint8; //!< Unsigned byte
typedef unsigned short uint16; //!< Unsigned word
//typedef unsigned long uint32; //!< Unsigned double word
typedef unsigned long long uint64; //!< Unsigned quadruple word
typedef signed char int8; //!< Signed byte
typedef signed short int16; //!< Signed word
//typedef signed long int32; //!< Signed double word
typedef signed long long int64; //!< Signed quadruple word
typedef signed int int32;
typedef unsigned int uint32;
/*----------------------------------------------------------------------------------------------*/
/* Constants for scaling the ephemeris found in the data message
the format is the following: TWO_N5 -> 2^-5, TWO_P4 -> 2^4, PI_TWO_N43 -> Pi*2^-43, etc etc
Additionally some of the PI*2^N terms are used in the tracking stuff
TWO_PX ==> 2^X
TWO_NX ==> 2^-X
PI_TWO_NX ==> Pi*2^-X
PI_TWO_PX ==> Pi*2^X
ONE_PI_TWO_PX = (1/Pi)*2^X
*/
/*----------------------------------------------------------------------------------------------*/
#define TWO_P4 (16) //!< 2^4
#define TWO_P11 (2048) //!< 2^11
#define TWO_P12 (4096) //!< 2^12
#define TWO_P14 (16384) //!< 2^14
#define TWO_P16 (65536) //!< 2^16
#define TWO_P19 (524288) //!< 2^19
#define TWO_P31 (2147483648.0) //!< 2^31
#define TWO_P32 (4294967296.0) //!< 2^32 this is too big for an int so add the x.0
#define TWO_P57 (1.441151880758559e+017) //!< 2^57
#define TWO_N5 (0.03125) //!< 2^-5
#define TWO_N11 (4.882812500000000e-004) //!< 2^-11
#define TWO_N19 (1.907348632812500e-006) //!< 2^-19
#define TWO_N20 (9.536743164062500e-007) //!< 2^-20
#define TWO_N21 (4.768371582031250e-007) //!< 2^-21
#define TWO_N24 (5.960464477539063e-008) //!< 2^-24
#define TWO_N25 (2.980232238769531e-008) //!< 2^-25
#define TWO_N27 (7.450580596923828e-009) //!< 2^-27
#define TWO_N29 (1.862645149230957e-009) //!< 2^-29
#define TWO_N30 (9.313225746154785e-010) //!< 2^-30
#define TWO_N31 (4.656612873077393e-010) //!< 2^-31
#define TWO_N32 (2.328306436538696e-010) //!< 2^-32
#define TWO_N33 (1.164153218269348e-010) //!< 2^-33
#define TWO_N38 (3.637978807091713e-012) //!< 2^-38
#define TWO_N43 (1.136868377216160e-013) //!< 2^-43
#define TWO_N50 (8.881784197001252e-016) //!< 2^-50
#define TWO_N55 (2.775557561562891e-017) //!< 2^-55
#define TWO_P56 (7.205759403792794e+016) //!< 2^56
#define TWO_P57 (1.441151880758559e+017) //!< 2^57
#define PI_TWO_N19 (5.992112452678286e-006) //!< Pi*2^-19
#define PI_TWO_N43 (3.571577341960839e-013) //!< Pi*2^-43
#define PI_TWO_N31 (1.462918079267160e-009) //!< Pi*2^-31
#define PI_TWO_N38 (1.142904749427469e-011) //!< Pi*2^-38
#define PI_TWO_N23 (3.745070282923929e-007) //!< Pi*2^-23
/* from ICD-GPS-2000 !!! Do not extend the number of significant digits !!! */
#ifndef PI
#define PI (3.141592653589793) //!< Pi
#endif
#ifndef TWO_PI
#define TWO_PI (6.283185307179586) //!< 2*Pi
#endif
#define THREE_PI_OVER_2 (4.7123889803) //!< 3*Pi/2
#define PI_OVER_2 (1.5707963267) //!< Pi/2
#define RAD_2_DEG (57.29577951308232) //!< 180/Pi
#define DEG_2_RAD (0.01745329251994) //!< Pi/180
/*----------------------------------------------------------------------------------------------*/
/* Channel Defines */
/*----------------------------------------------------------------------------------------------*/
#define FRAME_SIZE_PLUS_2 (12) //!< Number of 30 bit words in subframe plus 2
#define PREAMBLE (unsigned long)(0x008B) //!< GPS data message preamble.
#define INVERSEPREAMBLE (unsigned long)(0x0074) //!< Inverted preamble.
/*----------------------------------------------------------------------------------------------*/
/* PVT Stuff */
/*----------------------------------------------------------------------------------------------*/
#define GRAVITY_CONSTANT (3.986005e14) //!< Earth's WGS-84 gravitational constant (m^3/s^2) as specified in IS-GPS-200D
#define WGS84OE (7.2921151467e-5) //!< Earth's WGS-84 rotation rate (rads/s) as specified in IS-GPS-200D
#define WGS84_MAJOR_AXIS (6378137.0) //!< Earth's WGS-84 ellipsoid's major axis
#define WGS84_MINOR_AXIS (6356752.314245) //!< Earth's WGS-84 ellipsoid's minor axis
#define SECONDS_IN_1024_WEEKS (619315200.0) //!< Number of seconds in 1024 weeks
#define SECONDS_IN_WEEK (604800.0) //!< Number of seconds in a week
#define HALF_OF_SECONDS_IN_WEEK (302400.0) //!< Number of seconds in one half of a week
#define SECONDS_IN_DAY (86400.0) //!< Number of seconds in a day
#define SECONDS_IN_HOUR (3600.0) //!< Number of seconds in an hour
#define SECONDS_IN_MINUTE (60.0) //!< Number of seconds in a minute
#define SECONDS_IN_HALF_HOUR (1800.0) //!< Number of seconds in a half hour
#define FOUR_HOURS (14400.0) //!< Number of seconds in 4 hrs
#define SECONDS_PER_MZCOUNT (0.6) //!< Seconds per RTCM-104 modified Z-count.
#define L1 (1.57542e9)
#define L2 (1.2276e9)
#define L1_WAVELENGTH (1.902936727983649e-001) //!< Meters
#define L1_OVER_C (5.255035468570728) //!< L1 over Speed O Light
#define C_OVER_L1 (0.190293672798365) //!< Speed O Light over L1
#ifndef SPEED_OF_LIGHT
#define SPEED_OF_LIGHT (2.99792458e8) //!< Speed of light (m/s) as specified in IS-GPS-200D
#endif
#define INVERSE_L1 (6.347513678891978e-10) //!< 1/L1
#define INVERSE_SPEED_OF_LIGHT (3.33564095198152049576e-9) //!< Inverse speed of light
#define CODE_RATE (1.023e6) //!< L1 C/A code chipping rate
#define INVERSE_CODE_RATE (9.775171065493646e-07) //!< 1/L1 C/A code chipping rate
#define CODE_CHIPS (1023)
#define SAMPS_MS (2048) //!< All incoming signals are resampled to this sampling frequency
#define SAMPLE_FREQUENCY (2048000) //!< All incoming signals are resampled to this sampling frequency
#define INVERSE_SAMPLE_FREQUENCY (4.882812500000000e-7)
/*----------------------------------------------------------------------------------------------*/
/* Global Serial Port */
/*----------------------------------------------------------------------------------------------*/
#define CHECK_STATUS(x) if((x) != NU_SUCCESS) {ERC_System_Error((x));}
#define READ (0)
#define WRITE (1)
/*----------------------------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------------------------*/
#define NON_EXISTENT_SV (666)
#define NON_EXISTENT_IODE (9999)
#define STALE_SPS_VALUE (99999)
/*----------------------------------------------------------------------------------------------*/
#endif //DEFINES_H_

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/*----------------------------------------------------------------------------------------------*/
/*! \file fft.cpp
//
// FILENAME: fft.cpp
//
// DESCRIPTION: Implements member functions of the FFT class.
//
// DEVELOPERS: Gregory W. Heckler (2003-2009)
//
// LICENSE TERMS: Copyright (c) Gregory W. Heckler 2009
//
// This file is part of the GPS Software Defined Radio (GPS-SDR)
//
// The GPS-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 2 of
// the License, or (at your option) any later version. The GPS-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.
//
// Note: Comments within this file follow a syntax that is compatible with
// DOXYGEN and are utilized for automated document extraction
//
// Reference:
*/
/*----------------------------------------------------------------------------------------------*/
#include "gps_sdr_fft.h"
#include <stdlib.h>
#include <math.h>
#include <string.h>
//#define NO_SIMD
#ifdef NO_SIMD
void rank(CPX *_A, CPX *_B, MIX *_W, int32 _nblocks, int32 _bsize);
void rankdf(CPX *_A, CPX *_B, MIX *_W, int32 _nblocks, int32 _bsize);
void rank_noscale(CPX *_A, CPX *_B, MIX *_W, int32 _nblocks, int32 _bsize);
void rankdf_noscale(CPX *_A, CPX *_B, MIX *_W, int32 _nblocks, int32 _bsize);
void bfly(CPX *_A, CPX *_B, MIX *_W);
void bflydf(CPX *_A, CPX *_B, MIX *_W);
void bfly_noscale(CPX *_A, CPX *_B, MIX *_W);
void bflydf_noscale(CPX *_A, CPX *_B, MIX *_W);
#else
void rank(CPX *_A, CPX *_B, MIX *_W, int32 _nblocks, int32 _bsize) __attribute__ ((noinline));
void rankdf(CPX *_A, CPX *_B, MIX *_W, int32 _nblocks, int32 _bsize) __attribute__ ((noinline));
void rank_noscale(CPX *_A, CPX *_B, MIX *_W, int32 _nblocks, int32 _bsize) __attribute__ ((noinline));
void rankdf_noscale(CPX *_A, CPX *_B, MIX *_W, int32 _nblocks, int32 _bsize) __attribute__ ((noinline));
#endif
FFT::FFT()
{
N = 0;
}
FFT::FFT(int32 _N)
{
int32 lcv;
for(lcv = 0; lcv < MAX_RANKS; lcv++)
R[lcv] = 1;
N = _N;
M = 0;
/* Get the number of ranks */
while(_N > 1)
{
M++;
_N >>= 1;
}
W = (MIX *)malloc(N/2*sizeof(MIX)); // Forward twiddle lookup
iW = (MIX *)malloc(N/2*sizeof(MIX)); // Inverse twiddle lookup
BR = (int32 *)malloc(N*sizeof(int32)); // Bit reverse lookup
BRX = (int32 *)malloc(N*sizeof(CPX)); // Shuffle temp array
initW();
initBR();
}
FFT::FFT(int32 _N, int32 _R[MAX_RANKS])
{
int32 lcv;
for(lcv = 0; lcv < MAX_RANKS; lcv++)
R[lcv] = _R[lcv];
N = _N;
M = 0;
/* Get the number of ranks */
while(_N > 1)
{
M++;
_N >>= 1;
}
W = (MIX *)malloc(N/2*sizeof(MIX)); // Forward twiddle lookup
iW = (MIX *)malloc(N/2*sizeof(MIX)); // Inverse twiddle lookup
BR = (int32 *)malloc(N*sizeof(int32)); // Bit reverse lookup
BRX = (int32 *)malloc(N*sizeof(CPX)); // Shuffle temp array
initW();
initBR();
}
FFT::~FFT()
{
free(BRX);
free(BR);
free(W);
free(iW);
}
void FFT::initW()
{
int32 lcv;
double s, c, phase;
const double pi = 3.14159265358979323846264338327;
for(lcv = 0; lcv < N/2; lcv++)
{
//Forward twiddles
phase = (-2*pi*lcv)/N;
c = floor(16384*cos(phase));
s = floor(16384*sin(phase));
W[lcv].i = (short)(c);
W[lcv].q = (short)(s);
W[lcv].nq = (short)(-s);
W[lcv].ni = (short)(c);
// fprintf(stdout,"W:%d,%d\n",W[lcv].i,W[lcv].q);
//Inverse twiddles
iW[lcv].i = (short)(c);
iW[lcv].q = (short)(-s);
iW[lcv].nq = (short)(s);
iW[lcv].ni = (short)(c);
}
}
void FFT::initBR()
{
int lcv, lcv2, index;
for(lcv = 0; lcv < N; lcv++)
{
index = 0;
for(lcv2 = 0; lcv2 < M; lcv2++)
{
index += ((lcv >> lcv2) & 0x1);
index <<= 1;
}
index >>= 1;
BR[lcv] = index;
// fprintf(stdout,"BR:%d\n",BR[lcv]);
}
}
void FFT::doFFT(CPX *_x, bool _shuf)
{
int32 lcv, nblocks, bsize;
CPX *a, *b;
MIX *w;
if(_shuf) {
doShuffle(_x); //bit reverse the array
}
bsize = 1;
nblocks = N >> 1;
for(lcv = 0; lcv < M; lcv++) //Loop over M ranks
{
a = _x;
b = _x + bsize;
w = W;
if(R[lcv])
rank(a, b, w, nblocks, bsize);
else
rank_noscale(a, b, w, nblocks, bsize);
bsize <<= 1;
nblocks >>= 1;
}
}
void FFT::doiFFT(CPX *_x, bool _shuf)
{
int32 lcv, nblocks, bsize;
CPX *a, *b;
MIX *w;
if(_shuf)
doShuffle(_x); //bit reverse the array
bsize = 1;
nblocks = N >> 1;
for(lcv = 0; lcv < M; lcv++) //Loop over M ranks
{
a = _x;
b = _x + bsize;
w = iW;
if(R[lcv])
rank(a, b, w, nblocks, bsize);
else
rank_noscale(a, b, w, nblocks, bsize);
bsize <<= 1;
nblocks >>= 1;
}
}
void FFT::doFFTdf(CPX *_x, bool _shuf)
{
int32 lcv;
int32 bsize;
int32 nblocks;
CPX *a, *b;
MIX *w;
bsize = N >> 1;
nblocks = 1;
for(lcv = 0; lcv < M; lcv++) //Loop over M ranks
{
a = _x;
b = _x + bsize;
w = W;
if(R[lcv])
rankdf(a, b, w, nblocks, bsize);
else
rankdf_noscale(a, b, w, nblocks, bsize);
bsize >>= 1;
nblocks <<= 1;
}
if(_shuf)
doShuffle(_x); //bit reverse the array
}
void FFT::doiFFTdf(CPX *_x, bool _shuf)
{
int32 lcv;
int32 bsize, nblocks;
CPX *a, *b;
MIX *w;
bsize = N >> 1;
nblocks = 1;
for(lcv = 0; lcv < M; lcv++) //Loop over M ranks
{
a = _x;
b = _x + bsize;
w = iW;
if(R[lcv])
rankdf(a, b, w, nblocks, bsize);
else
rankdf_noscale(a, b, w, nblocks, bsize);
bsize >>= 1;
nblocks <<= 1;
}
if(_shuf)
doShuffle(_x); //bit reverse the array
}
void FFT::doShuffle(CPX *_x)
{
int32 lcv;
int32 *p = (int32 *)_x;
memcpy(BRX, p, N*sizeof(CPX));
for(lcv = 0; lcv < N; lcv++)
p[lcv] = BRX[BR[lcv]];
}
#ifdef NO_SIMD /* Include the cPP FFT Functions */
void rank(CPX *_A, CPX *_B, MIX *_W, int32 _nblocks, int32 _bsize)
{
int32 lcv, lcv2;
MIX *wbase = _W;
for(lcv = 0; lcv < _nblocks; lcv++)
{
for(lcv2 = 0; lcv2 < _bsize; lcv2++)
{
bfly(_A, _B, _W);
_A++; _B++; _W+=_nblocks;
}
_A += _bsize;
_B += _bsize;
_W = wbase;
}
}
void rank_noscale(CPX *_A, CPX *_B, MIX *_W, int32 _nblocks, int32 _bsize)
{
int32 lcv, lcv2;
MIX *wbase = _W;
for(lcv = 0; lcv < _nblocks; lcv++)
{
for(lcv2 = 0; lcv2 < _bsize; lcv2++)
{
bfly_noscale(_A, _B, _W);
_A++; _B++; _W+=_nblocks;
}
_A += _bsize;
_B += _bsize;
_W = wbase;
}
}
void rankdf(CPX *_A, CPX *_B, MIX *_W, int32 _nblocks, int32 _bsize)
{
int32 lcv, lcv2;
MIX *wbase = _W;
for(lcv = 0; lcv < _nblocks; lcv++)
{
for(lcv2 = 0; lcv2 < _bsize; lcv2++)
{
bflydf(_A, _B, _W);
_A++; _B++; _W+=_nblocks;
}
_A += _bsize;
_B += _bsize;
_W = wbase;
}
}
void rankdf_noscale(CPX *_A, CPX *_B, MIX *_W, int32 _nblocks, int32 _bsize)
{
int32 lcv, lcv2;
MIX *wbase = _W;
for(lcv = 0; lcv < _nblocks; lcv++)
{
for(lcv2 = 0; lcv2 < _bsize; lcv2++)
{
bflydf_noscale(_A, _B, _W);
_A++; _B++; _W+=_nblocks;
}
_A += _bsize;
_B += _bsize;
_W = wbase;
}
}
void bfly(CPX *_A, CPX *_B, MIX *_W)
{
int32 bi, bq;
_A->i >>= 1;
_A->q >>= 1;
_B->i >>= 1;
_B->q >>= 1;
bi = _B->i*_W->i - _B->q*_W->q;
bq = _B->i*_W->q + _B->q*_W->i;
bi = (bi + 8192) >> 14;
bq = (bq + 8192) >> 14;
_B->i = _A->i - (int16)bi;
_B->q = _A->q - (int16)bq;
_A->i += (int16)bi;
_A->q += (int16)bq;
}
void bfly_noscale(CPX *_A, CPX *_B, MIX *_W)
{
int32 bi, bq;
bi = _B->i*_W->i - _B->q*_W->q;
bq = _B->i*_W->q + _B->q*_W->i;
bi = (bi + 8192) >> 14;
bq = (bq + 8192) >> 14;
_B->i = _A->i - (int16)bi;
_B->q = _A->q - (int16)bq;
_A->i += (int16)bi;
_A->q += (int16)bq;
}
void bflydf(CPX *_A, CPX *_B, MIX *_W)
{
int32 bi, bq;
_A->i >>= 1;
_A->q >>= 1;
_B->i >>= 1;
_B->q >>= 1;
bi = _B->i;
bq = _B->q;
_B->i = _A->i - bi;
_B->q = _A->q - bq;
_A->i = _A->i + bi;
_A->q = _A->q + bq;
bi = _A->i*_W->i - _A->q*_W->q;
bq = _A->i*_W->q + _A->q*_W->i;
bi = (bi + 8192) >> 14;
bq = (bq + 8192) >> 14;
_A->i += (int16)bi;
_A->q += (int16)bq;
}
void bflydf_noscale(CPX *_A, CPX *_B, MIX *_W)
{
int32 bi, bq;
bi = _B->i;
bq = _B->q;
_B->i = _A->i - bi;
_B->q = _A->q - bq;
_A->i = _A->i + bi;
_A->q = _A->q + bq;
bi = _A->i*_W->i - _A->q*_W->q;
bq = _A->i*_W->q + _A->q*_W->i;
bi = (bi + 8192) >> 14;
bq = (bq + 8192) >> 14;
_A->i += (int16)bi;
_A->q += (int16)bq;
}
#else /* Include the SIMD FFT Functions */
void rank(CPX *_A, CPX *_B, MIX *_W, int32 _nblocks, int32 _bsize)
{
__asm
(
".intel_syntax noprefix \n" //Use intel syntax
"push ebx\n\t"
"mov ebx, [ebp+8] \n" //A
"mov edi, [ebp+12] \n" //B
"mov edx, [ebp+20] \n" //nblocks
"mov eax, 0x00002000 \n"
"movd mm4, eax \n"
"punpckldq mm4, mm4 \n" //Low 32 bits to high 32 bits
"B%=: \n"
"mov esi, [ebp+16] \n" //W
"mov ecx, 0x0 \n"
"mov eax, [ebp+20] \n" //nblocks
"sal eax, 3 \n" //make into bytes
"S%=: \n"
"movd mm0, [ebx+ecx*4]\n" //Copy A to mm0
"movd mm1, [edi+ecx*4]\n" //Copy B to mm1
"movq mm2, [esi] \n" //Copy W to mm2
"psraw mm0, 1 \n" //Divide A by 2
"psraw mm1, 1 \n" //Divide B by 2
"movq mm3, mm0 \n" //Copy A to mm3
"punpckldq mm1, mm1 \n" //Low 32 bits to high 32 bits
"pmaddwd mm1, mm2 \n" //Multiply and add
"padddw mm1, mm4 \n"
"psrad mm1, 0xe \n" //Right shift by 14 bits
"packssdw mm1, mm1 \n" //Pack back into 16 bit interleaved
"paddw mm0, mm1 \n" //A+Bw
"psubw mm3, mm1 \n" //A-Bw
"movd [ebx+ecx*4], mm0\n" //Copy back to A
"movd [edi+ecx*4], mm3\n" //Copy back to B
"add esi, eax \n"
"add ecx, 0x1 \n"
"cmp ecx, [ebp+24] \n"
"jne S%= \n"
"sal ecx, 3 \n"
"add ebx, ecx \n"
"add edi, ecx \n"
"sub edx, 0x1 \n"
"jnz B%= \n"
"pop ebx\n\t"
"EMMS \n" //Done with MMX
".att_syntax \n" //Back to ATT syntax
:
: "m" (_A), "m" (_B), "m" (_W), "m" (_nblocks), "m" (_bsize)
: "%eax", "%ecx", "%edx", "%edi", "%esi"
);
}
void rank_noscale(CPX *_A, CPX *_B, MIX *_W, int32 _nblocks, int32 _bsize)
{
__asm
(
".intel_syntax noprefix \n" //Use intel syntax
"push ebx\n\t"
"mov ebx, [ebp+8] \n" //A
"mov edi, [ebp+12] \n" //B
"mov edx, [ebp+20] \n" //nblocks
"mov eax, 0x00002000 \n"
"movd mm4, eax \n"
"punpckldq mm4, mm4 \n" //Low 32 bits to high 32 bits
"B%=: \n"
"mov esi, [ebp+16] \n" //W
"mov ecx, 0x0 \n"
"mov eax, [ebp+20] \n" //nblocks
"sal eax, 3 \n" //make into bytes
"S%=: \n"
"movd mm0, [ebx+ecx*4]\n" //Copy A to mm0
"movd mm1, [edi+ecx*4]\n" //Copy B to mm1
"movq mm2, [esi] \n" //Copy W to mm2
"movq mm3, mm0 \n" //Copy A to mm3
"punpckldq mm1, mm1 \n" //Low 32 bits to high 32 bits
"pmaddwd mm1, mm2 \n" //Multiply and add
"padddw mm1, mm4 \n"
"psrad mm1, 0xe \n" //Right shift by 14 bits
"packssdw mm1, mm1 \n" //Pack back into 16 bit interleaved
"paddw mm0, mm1 \n" //A+Bw
"psubw mm3, mm1 \n" //A-Bw
"movd [ebx+ecx*4], mm0\n" //Copy back to A
"movd [edi+ecx*4], mm3\n" //Copy back to B
"add esi, eax \n"
"add ecx, 0x1 \n"
"cmp ecx, [ebp+24] \n"
"jne S%= \n"
"sal ecx, 3 \n"
"add ebx, ecx \n"
"add edi, ecx \n"
"sub edx, 0x1 \n"
"jnz B%= \n"
"pop ebx\n\t"
"EMMS \n" //Done with MMX
".att_syntax \n" //Back to ATT syntax
:
: "m" (_A), "m" (_B), "m" (_W), "m" (_nblocks), "m" (_bsize)
: "%eax", "%ecx", "%edx", "%edi", "%esi"
);
}
//static void bflydf(void *_A, void *_B, void *_W)
//{
//
// __asm
// {
// mov ebx, _A;
// mov edi, _B;
// mov esi, _W;
//
// movd mm0, [ebx]; /*move 32 bits from A to bottom 32 bits of mm0*/
// movd mm1, [edi]; /*move 32 bits from B to bottom 32 bits of mm1*/
// movq mm2, [esi]; /*move 64 bits from W to mm2*/
// psraw mm0, 0x1;
// psraw mm1, 0x1;
// movq mm3, mm0; /*copy A to mm3*/
// paddw mm0, mm1; /*A+B*/
// psubw mm3, mm1; /*A-B*/
// punpckldq mm3, mm3; /*copy bottom 32 bits of B data into high 32 bits*/
// pmaddwd mm3, mm2; /*complex multiply, real now 0..31 of mm1, imag 32..63 of mm1*/
// psrad mm3, 0xf; /*right shift 0..31 by 16, 32..63 by 16*/
// packssdw mm3, mm3; /*pack bits 0..31 to 0..16, bits 32..63 to 16..31*/
// movd [ebx], mm0;
// movd [edi], mm3;
//
// EMMS;
// }
//}
void rankdf(CPX *_A, CPX *_B, MIX *_W, int32 _nblocks, int32 _bsize)
{
__asm
(
".intel_syntax noprefix \n" //Use intel syntax
"push ebx\n\t"
"mov ebx, [ebp+8] \n" //A
"mov edi, [ebp+12] \n" //B
"mov edx, [ebp+20] \n" //nblocks
"mov eax, 0x00002000 \n"
"movd mm4, eax \n"
"punpckldq mm4, mm4 \n" //Low 32 bits to high 32 bits
"B%=: \n"
"mov esi, [ebp+16] \n" //W
"mov ecx, [ebp+24] \n" //bsize
"mov eax, [ebp+20] \n" //nblocks
"sal eax, 3 \n" //make into bytes
"L%=: \n"
"movd mm0, [ebx] \n" //Copy A to mm0
"movd mm1, [edi] \n" //Copy B to mm1
"movq mm2, [esi] \n" //Copy W to mm2
"psraw mm0, 1 \n" //Divide A by 2
"psraw mm1, 1 \n" //Divide B by 2
"movq mm3, mm0 \n" //Copy A to mm3
"paddw mm0, mm1 \n" //A+B
"psubw mm3, mm1 \n" //A-B
"punpckldq mm3, mm3 \n" //Copy bottom 32 bits of B data into high 32 bits*/
"pmaddwd mm3, mm2 \n" //Complex multiply, real now 0..31 of mm1, imag 32..63 of mm1*/
"padddw mm3, mm4 \n"
"psrad mm3, 0xe \n" //Right shift 0..31 by 14, 32..63 by 14*/
"packssdw mm3, mm3 \n" //Pack bits 0..31 to 0..16, bits 32..63 to 16..31*/
"movd [ebx], mm0 \n" //Copy back to A
"movd [edi], mm3 \n" //Copy back to B
"add ebx, 0x4 \n"
"add edi, 0x4 \n"
"add esi, eax \n"
"loop L%= \n"
"mov ecx, [ebp+24] \n" //bsize
"sal ecx, 2 \n"
"add ebx, ecx \n"
"add edi, ecx \n"
"sub edx, 0x1 \n"
"jnz B%= \n"
"pop ebx\n\t"
"EMMS \n" //Done with MMX
".att_syntax \n" //Back to ATT syntax
:
: "m" (_A), "m" (_B), "m" (_W), "m" (_nblocks), "m" (_bsize)
: "%eax", "%ecx", "%edx", "%edi", "%esi"
);
}
void rankdf_noscale(CPX *_A, CPX *_B, MIX *_W, int32 _nblocks, int32 _bsize)
{
__asm
(
".intel_syntax noprefix \n" //Use intel syntax
"push ebx\n\t"
"mov ebx, [ebp+8] \n" //A
"mov edi, [ebp+12] \n" //B
"mov edx, [ebp+20] \n" //nblocks
"mov eax, 0x00002000 \n"
"movd mm4, eax \n"
"punpckldq mm4, mm4 \n" //Low 32 bits to high 32 bits
"B%=: \n"
"mov esi, [ebp+16] \n" //W
"mov ecx, [ebp+24] \n" //bsize
"mov eax, [ebp+20] \n" //nblocks
"sal eax, 3 \n" //make into bytes
"L%=: \n"
"movd mm0, [ebx] \n" //Copy A to mm0
"movd mm1, [edi] \n" //Copy B to mm1
"movq mm2, [esi] \n" //Copy W to mm2
"movq mm3, mm0 \n" //Copy A to mm3
"paddw mm0, mm1 \n" //A+B
"psubw mm3, mm1 \n" //A-B
"punpckldq mm3, mm3 \n" //Copy bottom 32 bits of B data into high 32 bits*/
"pmaddwd mm3, mm2 \n" //Complex multiply, real now 0..31 of mm1, imag 32..63 of mm1*/
"padddw mm3, mm4 \n"
"psrad mm3, 0xe \n" //Right shift 0..31 by 14, 32..63 by 14*/
"packssdw mm3, mm3 \n" //Pack bits 0..31 to 0..16, bits 32..63 to 16..31*/
"movd [ebx], mm0 \n" //Copy back to A
"movd [edi], mm3 \n" //Copy back to B
"add ebx, 0x4 \n"
"add edi, 0x4 \n"
"add esi, eax \n"
"loop L%= \n"
"mov ecx, [ebp+24] \n" //bsize
"sal ecx, 2 \n"
"add ebx, ecx \n"
"add edi, ecx \n"
"sub edx, 0x1 \n"
"jnz B%= \n"
"pop ebx\n\t"
"EMMS \n" //Done with MMX
".att_syntax \n" //Back to ATT syntax
:
: "m" (_A), "m" (_B), "m" (_W), "m" (_nblocks), "m" (_bsize)
: "%eax", "%ecx", "%edx", "%edi", "%esi"
);
}
//void bfly(CPX *_A, CPX *_B, MIX *_W)
//{
// __asm
// (
// ".intel_syntax noprefix \n" //Use intel syntax
// "mov ebx, [ebp+8] \n" //A
// "mov edi, [ebp+12] \n" //B
// "mov esi, [ebp+16] \n" //W
// "movd mm0, [ebx] \n" //Copy A to mm0
// "movd mm1, [edi] \n" //Copy B to mm1
// "movq mm2, [esi] \n" //Copy W to mm2
// "psraw mm0, 1 \n" //Divide A by 2
// "psraw mm1, 1 \n" //Divide B by 2
// "movq mm3, mm0 \n" //Copy A to mm3
// "punpckldq mm1, mm1 \n" //Low 32 bits to high 32 bits
// "pmaddwd mm1, mm2 \n" //Multiply and add
// "psrad mm1, 0xe \n" //Right shift by 14 bits
// "packssdw mm1, mm1 \n" //Pack back into 16 bit interleaved
// "paddw mm0, mm1 \n" //A+Bw
// "psubw mm3, mm1 \n" //A-Bw
// "movd [ebx], mm0 \n" //Copy back to A
// "movd [edi], mm3 \n" //Copy back to B
// "EMMS \n" //Done with MMX
// ".att_syntax \n" //Back to ATT syntax
// :
// :
// : "%eax", "%ebx", "%ecx", "%edx", "%edi", "%esi"
// );
//}
//
//
//void block(CPX *_A, CPX *_B, MIX *_W, int32 _nblocks, int32 _bsize)
//{
//
// __asm
// (
// ".intel_syntax noprefix \n" //Use intel syntax
// "mov ebx, [ebp+8] \n" //A
// "mov edi, [ebp+12] \n" //B
// "mov esi, [ebp+16] \n" //W
// "mov eax, [ebp+20] \n" //nblocks
// "sal eax, 3 \n" //make into bytes
// "mov ecx, [ebp+24] \n" //bsize
// "Lbsize: \n"
// "movd mm0, [ebx] \n" //Copy A to mm0
// "movd mm1, [edi] \n" //Copy B to mm1
// "movq mm2, [esi] \n" //Copy W to mm2
// "psraw mm0, 1 \n" //Divide A by 2
// "psraw mm1, 1 \n" //Divide B by 2
// "movq mm3, mm0 \n" //Copy A to mm3
// "punpckldq mm1, mm1 \n" //Low 32 bits to high 32 bits
// "pmaddwd mm1, mm2 \n" //Multiply and addint64
// "psrad mm1, 0xe \n" //Right shift by 14 bits
// "packssdw mm1, mm1 \n" //Pack back into 16 bit interleaved
// "paddw mm0, mm1 \n" //A+Bw
// "psubw mm3, mm1 \n" //A-Bw
// "movd [ebx], mm0 \n" //Copy back to A
// "movd [edi], mm3 \n" //Copy back to B
// "add ebx, 0x4 \n"
// "add edi, 0x4 \n"
// "add esi, eax \n"
// "loop Lbsize \n"
// "EMMS \n" //Done with MMX
// ".att_syntax \n" //Back to ATT syntax
// :
// :
// : "%eax", "%ebx", "%ecx", "%edx", "%edi", "%esi"
// );
//
//}
#endif

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/*----------------------------------------------------------------------------------------------*/
/*! \file fft.h
//
// FILENAME: fft.h
//
// DESCRIPTION: Defines the FFT class.
//
// DEVELOPERS: Gregory W. Heckler (2003-2009)
//
// LICENSE TERMS: Copyright (c) Gregory W. Heckler 2009
//
// This file is part of the GPS Software Defined Radio (GPS-SDR)
//
// The GPS-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 2 of
// the License, or (at your option) any later version. The GPS-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.
//
// Note: Comments within this file follow a syntax that is compatible with
// DOXYGEN and are utilized for automated document extraction
//
// Reference:
*/
/*----------------------------------------------------------------------------------------------*/
#ifndef FFT_H_
#define FFT_H_
#include "gps_sdr_defines.h"
#include "gps_sdr_signal_processing.h"
#define MAX_RANKS (16)
/*! @ingroup CLASSES
@brief /xyzzy */
class FFT
{
private:
MIX *W; //!< Twiddle lookup array for FFT
MIX *iW; //!< Twiddle lookup array for iFFT
int32 *BRX; //!< Re-order temp array
int32 *BR; //!< Re-order index array
int32 N; //!< Length (should be 2^N!!!)
int32 M; //!< Log2(N) (number of ranks)
int32 R[16]; //!< Programmable rank scaling
void initW(); //!< Initialize twiddles
void initBR(); //!< Initialize re-order array
void doShuffle(CPX *_x); //!< Do bit-reverse shuffling
public:
FFT(); //!< Initialize FFT
FFT(int32 _N); //!< Initialize FFT for 2^N
FFT(int32 _N, int32 _R[MAX_RANKS]); //!< Initialize FFT for 2^N, with ranks
~FFT(); //!< Destructor
void doFFT(CPX *_x, bool _shuf); //!< Forward FFT, decimate in time
void doiFFT(CPX *_x, bool _shuf); //!< Inverse FFT, decimate in time
void doFFTdf(CPX *_x, bool _shuf); //!< Forward FFT, decimate in frequency
void doiFFTdf(CPX *_x, bool _shuf); //!< Inverse FFT, decimate in frequency
};
#endif /*FFT_H_*/

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src/algorithms/libs/gps_sdr_prn_codes_short.h Normal file
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#include "gps_sdr_signal_processing.h"
#include <math.h>
#include <stdlib.h>
#include <cmath>
/*!
* The SV ID is _prn=ID -1
*/
void code_gen_conplex(std::complex<float>* _dest, int32 _prn, unsigned int _chip_shift) {
uint32 G1[1023];
uint32 G2[1023];
uint32 G1_register[10], G2_register[10];
uint32 feedback1, feedback2;
uint32 lcv, lcv2;
uint32 delay;
int32 prn = _prn-1; //Move the PRN code to fit an array indices
/* G2 Delays as defined in GPS-ISD-200D */
int32 delays[51] = {5, 6, 7, 8, 17, 18, 139, 140, 141, 251, 252, 254 ,255, 256, 257, 258, 469, 470, 471, 472,
473, 474, 509, 512, 513, 514, 515, 516, 859, 860, 861, 862, 145, 175, 52, 21, 237, 235, 886, 657, 634, 762,
355, 1012, 176, 603, 130, 359, 595, 68, 386};
/* A simple error check */
if((prn < 0) || (prn > 51))
return;
for(lcv = 0; lcv < 10; lcv++)
{
G1_register[lcv] = 1;
G2_register[lcv] = 1;
}
/* Generate G1 & G2 Register */
for(lcv = 0; lcv < 1023; lcv++)
{
G1[lcv] = G1_register[0];
G2[lcv] = G2_register[0];
feedback1 = G1_register[7]^G1_register[0];
feedback2 = (G2_register[8] + G2_register[7] + G2_register[4] + G2_register[2] + G2_register[1] + G2_register[0]) & 0x1;
for(lcv2 = 0; lcv2 < 9; lcv2++)
{
G1_register[lcv2] = G1_register[lcv2+1];
G2_register[lcv2] = G2_register[lcv2+1];
}
G1_register[9] = feedback1;
G2_register[9] = feedback2;
}
/* Set the delay */
delay = 1023 - delays[prn];
delay+=_chip_shift;
delay %= 1023;
/* Generate PRN from G1 and G2 Registers */
for(lcv = 0; lcv < 1023; lcv++)
{
_dest[lcv] = std::complex<float>(G1[(lcv+_chip_shift)%1023]^G2[delay], 0);
if(_dest[lcv].real()==0.0) //javi
{
_dest[lcv].real(-1.0);
}
delay++;
delay %= 1023;
//std::cout<<_dest[lcv].real(); //OK
}
}
/*----------------------------------------------------------------------------------------------*/
/*!
* code_gen, generate the given prn code
* */
int32 code_gen(CPX *_dest, int32 _prn)
{
uint32 G1[1023];
uint32 G2[1023];
uint32 G1_register[10], G2_register[10];
uint32 feedback1, feedback2;
uint32 lcv, lcv2;
uint32 delay;
int32 prn = _prn-1; //Move the PRN code to fit an array indices
/* G2 Delays as defined in GPS-ISD-200D */
int32 delays[51] = {5, 6, 7, 8, 17, 18, 139, 140, 141, 251, 252, 254 ,255, 256, 257, 258, 469, 470, 471, 472,
473, 474, 509, 512, 513, 514, 515, 516, 859, 860, 861, 862, 145, 175, 52, 21, 237, 235, 886, 657, 634, 762,
355, 1012, 176, 603, 130, 359, 595, 68, 386};
/* A simple error check */
if((prn < 0) || (prn > 51))
return(0);
for(lcv = 0; lcv < 10; lcv++)
{
G1_register[lcv] = 1;
G2_register[lcv] = 1;
}
/* Generate G1 & G2 Register */
for(lcv = 0; lcv < 1023; lcv++)
{
G1[lcv] = G1_register[0];
G2[lcv] = G2_register[0];
feedback1 = G1_register[7]^G1_register[0];
feedback2 = (G2_register[8] + G2_register[7] + G2_register[4] + G2_register[2] + G2_register[1] + G2_register[0]) & 0x1;
for(lcv2 = 0; lcv2 < 9; lcv2++)
{
G1_register[lcv2] = G1_register[lcv2+1];
G2_register[lcv2] = G2_register[lcv2+1];
}
G1_register[9] = feedback1;
G2_register[9] = feedback2;
}
/* Set the delay */
delay = 1023 - delays[prn];
/* Generate PRN from G1 and G2 Registers */
for(lcv = 0; lcv < 1023; lcv++)
{
_dest[lcv].i = G1[lcv]^G2[delay];
_dest[lcv].q = 0;
delay++;
delay %= 1023;
}
return(1);
}
/*----------------------------------------------------------------------------------------------*/
/*!
* code_gen_complex_sampled, generate GPS L1 C/A code complex for the desired SV ID and sampled to specific sampling frequency
*/
void code_gen_complex_sampled(std::complex<float>* _dest, unsigned int _prn, int32 _fs, unsigned int _chip_shift)
{
// This function is based on the GNU software GPS for MATLAB in the Kay Borre book
std::complex<float> _code[1023];
int32 _samplesPerCode,_codeValueIndex;
float _ts;
float _tc;
const int32 _codeFreqBasis=1023000; //Hz
const int32 _codeLength=1023;
//--- Find number of samples per spreading code ----------------------------
_samplesPerCode = round(_fs / (_codeFreqBasis / _codeLength));
//--- Find time constants --------------------------------------------------
_ts = 1/(float)_fs; // Sampling period in sec
_tc = 1/(float)_codeFreqBasis; // C/A chip period in sec
code_gen_conplex(_code,_prn,_chip_shift); //generate C/A code 1 sample per chip
//std::cout<<"ts="<<_ts<<std::endl;
//std::cout<<"tc="<<_tc<<std::endl;
//std::cout<<"sv="<<_prn<<std::endl;
for (int32 i=0;i<_samplesPerCode;i++)
{
//=== Digitizing =======================================================
//--- Make index array to read C/A code values -------------------------
// The length of the index array depends on the sampling frequency -
// number of samples per millisecond (because one C/A code period is one
// millisecond).
_codeValueIndex = ceil((_ts * ((float)i+1)) / _tc)-1;
//--- Make the digitized version of the C/A code -----------------------
// The "upsampled" code is made by selecting values form the CA code
// chip array (caCode) for the time instances of each sample.
if (i==_samplesPerCode-1){
//--- Correct the last index (due to number rounding issues) -----------
_dest[i] = _code[_codeLength-1];
}else{
_dest[i] = _code[_codeValueIndex]; //repeat the chip -> upsample
}
//std::cout<<_codeValueIndex;
}
}
/*----------------------------------------------------------------------------------------------*/
/*!
* sine_gen, generate a full scale sinusoid of frequency f with sampling frequency fs for _samps samps and put it into _dest
* */
void sine_gen(CPX *_dest, double _f, double _fs, signed int _samps) {
signed int lcv;
signed short c, s;
float phase, phase_step;
phase = 0;
phase_step = (float)TWO_PI*_f/_fs;
for(lcv = 0; lcv < _samps; lcv++) {
c = (signed short)floor(16383.0*cos(phase));
s = (signed short)floor(16383.0*sin(phase));
_dest[lcv].i = c;
_dest[lcv].q = s;
phase += phase_step;
}
}
/*----------------------------------------------------------------------------------------------*/
void sine_gen_complex(std::complex<float>* _dest, double _f, double _fs, unsigned int _samps) {
double phase, phase_step;
phase_step = ((double)TWO_PI*_f)/_fs;
for(unsigned int i = 0; i < _samps; i++) {
//_dest[i] = std::complex<float>(16383.0*cos(phase), 16383.0*sin(phase));
_dest[i] = std::complex<float>(cos(phase),sin(phase));
phase += phase_step;
}
}
/*----------------------------------------------------------------------------------------------*/
void sine_gen(CPX *_dest, double _f, double _fs, int32 _samps, double _p)
{
int32 lcv;
int16 c, s;
double phase, phase_step;
phase = _p;
phase_step = (double)TWO_PI*_f/_fs;
for(lcv = 0; lcv < _samps; lcv++)
{
c = (int16)floor(16383.0*cos(phase));
s = (int16)floor(16383.0*sin(phase));
_dest[lcv].i = c;
_dest[lcv].q = s;
phase += phase_step;
}
}
/*----------------------------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------------------------*/
/*!
* wipeoff_gen, generate a full scale sinusoid of frequency f with sampling frequency fs for _samps samps and put it into _dest
* */
void wipeoff_gen(MIX *_dest, double _f, double _fs, int32 _samps)
{
int32 lcv;
int16 c, s;
double phase, phase_step;
phase = 0;
phase_step = (double)TWO_PI*_f/_fs;
for(lcv = 0; lcv < _samps; lcv++)
{
c = (int16)floor(16383.0*cos(phase));
s = (int16)floor(16383.0*sin(phase));
_dest[lcv].i = _dest[lcv].ni = c;
_dest[lcv].q = s;
_dest[lcv].nq = -s;
phase += phase_step;
}
}
/*----------------------------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------------------------*/
void downsample(CPX *_dest, CPX *_source, double _fdest, double _fsource, int32 _samps)
{
int32 lcv, k;
uint32 phase_step;
uint32 lphase, phase;
phase_step = (uint32)floor((double)4294967296.0*_fdest/_fsource);
k = lphase = phase = 0;
for(lcv = 0; lcv < _samps; lcv++)
{
if(phase <= lphase)
{
_dest[k] = _source[lcv];
k++;
}
lphase = phase;
phase += phase_step;
}
}
/*----------------------------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------------------------*/
/*!
* Gather statistics and run AGC
* */
int32 run_agc(CPX *_buff, int32 _samps, int32 _bits, int32 _scale)
{
int32 lcv, num;
int16 max, *p;
int16 val;
p = (int16 *)&_buff[0];
val = (1 << _scale - 1);
max = 1 << _bits;
num = 0;
if(_scale)
{
for(lcv = 0; lcv < 2*_samps; lcv++)
{
p[lcv] += val;
p[lcv] >>= _scale;
if(abs(p[lcv]) > max)
num++;
}
}
else
{
for(lcv = 0; lcv < 2*_samps; lcv++)
{
if(abs(p[lcv]) > max)
num++;
}
}
return(num);
}
/*----------------------------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------------------------*/
/*!
* Get a rough first guess of scale value to quickly initialize agc
* */
void init_agc(CPX *_buff, int32 _samps, int32 bits, int32 *scale)
{
int32 lcv;
int16 *p;
int32 max;
p = (int16 *)&_buff[0];
max = 0;
for(lcv = 0; lcv < 2*_samps; lcv++)
{
if(p[lcv] > max)
max = p[lcv];
}
scale[0] = (1 << 14) / max;
}
/*----------------------------------------------------------------------------------------------*/

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#ifndef GPS_SDR_SIGNAL_PROCESSING_H_
#define GPS_SDR_SIGNAL_PROCESSING_H_
#include "gps_sdr_defines.h"
#include <complex>
#include <iostream>
/*
* Signal processing functions from gps-sdr.
*/
/*----------------------------------------------------------------------------------------------*/
/*! @ingroup STRUCTS
* @brief Define the CPX structure, used in the Fine_Acquisition FFT */
typedef struct CPX
{
int16 i; //!< Real value
int16 q; //!< Imaginary value
} CPX;
/*! \ingroup STRUCTS
* @brief Format of complex accumulations */
typedef struct CPX_ACCUM {
int32 i; //!< Inphase (real)
int32 q; //!< Quadrature (imaginary)
} CPX_ACCUM;
/*! \ingroup STRUCTS
*
*/
typedef struct MIX {
int16 i; //!< Inphase (real)
int16 nq; //!< Quadrature (imaginary)
int16 q; //!< Quadrature (imaginary)
int16 ni; //!< Inphase (real)
} MIX;
/*----------------------------------------------------------------------------------------------*/
void code_gen_conplex(std::complex<float>* _dest, int32 _prn, unsigned int _chip_shift);
void code_gen_complex_sampled(std::complex<float>* _dest, unsigned int _prn, int32 _fs, unsigned int _chip_shift);
int32 code_gen(CPX *_dest, int32 _prn);
void sine_gen(CPX *_dest, double _f, double _fs, int32 _samps);
void sine_gen_complex(std::complex<float>* _dest, double _f, double _fs, unsigned int _samps);
void sine_gen(CPX *_dest, double _f, double _fs, int32 _samps, double _p);
void wipeoff_gen(MIX *_dest, double _f, double _fs, int32 _samps);
void downsample(CPX *_dest, CPX *_source, double _fdest, double _fsource, int32 _samps);
void init_agc(CPX *_buff, int32 _samps, int32 bits, int32 *scale);
int32 run_agc(CPX *_buff, int32 _samps, int32 bits, int32 scale);
#endif /* GPS_SDR_SIGNAL_PROCESSING_H_ */

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/*! \file SIMD.h
Contains prototpyes for all the SIMD functions
*/
/************************************************************************************************
Copyright 2008 Gregory W Heckler
This file is part of the GPS Software Defined Radio (GPS-SDR)
The GPS-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 2 of the
License, or (at your option) any later version.
The GPS-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 GPS-SDR; if not,
write to the:
Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
************************************************************************************************/
#ifndef SIMD_H_
#define SIMD_H_
//#ifdef GLOBALS_HERE
// #define EXTERN
//#else
// #define EXTERN extern
//#endif
#include "gps_sdr_defines.h"
#include "gps_sdr_signal_processing.h"
/* Found in CPUID.cpp */
/*----------------------------------------------------------------------------------------------*/
bool CPU_MMX(); //!< Does the CPU support MMX?
bool CPU_SSE(); //!< Does the CPU support SSE?
bool CPU_SSE2(); //!< Does the CPU support SSE2?
bool CPU_SSE3(); //!< Does the CPU support SSE3?
bool CPU_SSSE3(); //!< Does the CPU support SSSE3? No thats not a typo!
bool CPU_SSE41(); //!< Does the CPU support SSE4.1?
bool CPU_SSE42(); //!< Does the CPU support SSE4.2?
void Init_SIMD(); //!< Initialize the global function pointers
/*----------------------------------------------------------------------------------------------*/
/* Found in SSE.cpp */
/*----------------------------------------------------------------------------------------------*/
void sse_add(int16 *A, int16 *B, int32 cnt) __attribute__ ((noinline)); //!< Pointwise vector addition
void sse_sub(int16 *A, int16 *B, int32 cnt) __attribute__ ((noinline)); //!< Pointwise vector difference
void sse_mul(int16 *A, int16 *B, int32 cnt) __attribute__ ((noinline)); //!< Pointwise vector multiply
int32 sse_dot(int16 *A, int16 *B, int32 cnt) __attribute__ ((noinline)); //!< Compute vector dot product
void sse_conj(CPX *A, int32 cnt) __attribute__ ((noinline)); //!< Pointwise vector conjugate
void sse_cacc(CPX *A, MIX *B, int32 cnt, int32 *iaccum, int32 *baccum) __attribute__ ((noinline)); //!< Compute dot product of cpx and a mix vector
void sse_cmul(CPX *A, CPX *B, int32 cnt) __attribute__ ((noinline)); //!< Pointwise vector multiply
void sse_cmuls(CPX *A, CPX *B, int32 cnt, int32 shift) __attribute__ ((noinline)); //!< Pointwise vector multiply with shift
void sse_cmulsc(CPX *A, CPX *B, CPX *C, int32 cnt, int32 shift) __attribute__ ((noinline)); //!< Pointwise vector multiply with shift, dump results into C
void sse_prn_accum(CPX *A, CPX *E, CPX *P, CPX *L, int32 cnt, CPX *accum) __attribute__ ((noinline)); //!< This is a long story
void sse_prn_accum_new(CPX *A, MIX *E, MIX *P, MIX *L, int32 cnt, CPX_ACCUM *accum) __attribute__ ((noinline)); //!< This is a long story
void sse_max(int32 *_A, int32 *_index, int32 *_magt, int32 _cnt) __attribute__ ((noinline));
/*----------------------------------------------------------------------------------------------*/
#endif /*SIMD_H_*/

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/*! \file x86.cpp
Emulate SIMD functionality with plain x86 crap, for older processors
*/
/************************************************************************************************
Copyright 2008 Gregory W Heckler
This file is part of the GPS Software Defined Radio (GPS-SDR)
The GPS-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 2 of the
License, or (at your option) any later version.
The GPS-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 GPS-SDR; if not,
write to the:
Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
************************************************************************************************/
#include "gps_sdr_x86.h"
#include "gr_complex.h"
#include <complex>
/*----------------------------------------------------------------------------------------------*/
void x86_add(int16 *_A, int16 *_B, int32 _cnt)
{
int16 *a = _A;
int16 *b = _B;
int32 lcv;
for(lcv = 0; lcv < _cnt; lcv++)
a[lcv] += b[lcv];
}
/*----------------------------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------------------------*/
void x86_sub(int16 *_A, int16 *_B, int32 _cnt)
{
int16 *a = _A;
int16 *b = _B;
int32 lcv;
for(lcv = 0; lcv < _cnt; lcv++)
a[lcv] -= b[lcv];
}
/*----------------------------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------------------------*/
void x86_mul(int16 *_A, int16 *_B, int32 _cnt)
{
int16 *a = _A;
int16 *b = _B;
int32 lcv;
for(lcv = 0; lcv < _cnt; lcv++)
a[lcv] *= b[lcv];
}
/*----------------------------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------------------------*/
void x86_muls(int16 *_A, int16 *_B, int32 _cnt, int32 _shift)
{
int32 lcv;
for(lcv = 0; lcv < _cnt; lcv++)
{
_A[lcv] *= *_B;
_A[lcv] >>= _shift;
}
}
/*----------------------------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------------------------*/
int32 x86_dot(int16 *_A, int16 *_B, int32 _cnt)
{
int32 accum = 0;
int16 *a = _A;
int16 *b = _B;
int32 lcv;
for(lcv = 0; lcv < _cnt; lcv++)
accum += (int32)a[lcv]*(int32)b[lcv];
return(accum);
}
/*----------------------------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------------------------*/
void x86_conj(CPX *_A, int32 _cnt)
{
int32 lcv;
for(lcv = 0; lcv < _cnt; lcv++)
_A[lcv].q = -_A[lcv].q;
}
/*----------------------------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------------------------*/
void x86_cmul(CPX *_A, CPX *_B, int32 _cnt)
{
int32 lcv;
int32 ai, aq;
int32 bi, bq;
int32 ti, tq;
for(lcv = 0; lcv < _cnt; lcv++)
{
ai = _A[lcv].i;
aq = _A[lcv].q;
bi = _B[lcv].i;
bq = _B[lcv].q;
ti = ai*bi-aq*bq;
tq = ai*bq+aq*bi;
_A[lcv].i = (int16)(ti);
_A[lcv].q = (int16)(tq);
}
}
/*----------------------------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------------------------*/
void x86_cmuls(CPX *_A, CPX *_B, int32 _cnt, int32 _shift)
{
int32 lcv;
int32 ai, aq;
int32 bi, bq;
int32 ti, tq;
int32 shift;
int32 round;
shift = _shift;
round = 1 << (shift-1);
for(lcv = 0; lcv < _cnt; lcv++)
{
ai = _A[lcv].i;
aq = _A[lcv].q;
bi = _B[lcv].i;
bq = _B[lcv].q;
ti = ai*bi-aq*bq;
tq = ai*bq+aq*bi;
ti += round;
tq += round;
ti >>= shift;
tq >>= shift;
_A[lcv].i = (int16)ti;
_A[lcv].q = (int16)tq;
}
}
/*----------------------------------------------------------------------------------------------*/
void x86_cmulsc_complex(std::complex<float> *_A, std::complex<float> *_B, std::complex<float> *_C, int32 _cnt) {
for(int i = 0; i < _cnt; i++) {
_C[i] = _A[i] * _B[i];
}
}
/*----------------------------------------------------------------------------------------------*/
void x86_cmulsc(CPX *_A, CPX *_B, CPX *_C, int32 _cnt, int32 _shift)
{
int32 lcv;
int32 ai, aq;
int32 bi, bq;
int32 ti, tq;
int32 shift;
int32 round;
shift = _shift;
round = 1 << (shift-1);
for(lcv = 0; lcv < _cnt; lcv++)
{
ai = _A[lcv].i;
aq = _A[lcv].q;
bi = _B[lcv].i;
bq = _B[lcv].q;
ti = ai*bi-aq*bq;
tq = ai*bq+aq*bi;
ti += round;
tq += round;
ti >>= shift;
tq >>= shift;
_C[lcv].i = (int16)ti;
_C[lcv].q = (int16)tq;
}
}
/*----------------------------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------------------------*/
void x86_cacc(CPX *_A, MIX *_B, int32 _cnt, int32 *_iaccum, int32 *_qaccum)
{
int32 lcv;
int32 ai, aq;
int32 ti, tq;
int32 iaccum;
int32 qaccum;
iaccum = qaccum = 0;
for(lcv = 0; lcv < _cnt; lcv++)
{
ai = _A[lcv].i;
aq = _A[lcv].q;
ti = ai*_B[lcv].i+aq*_B[lcv].nq;
tq = ai*_B[lcv].q+aq*_B[lcv].ni;
iaccum += ti;
qaccum += tq;
}
*_iaccum = iaccum;
*_qaccum = qaccum;
}
/*----------------------------------------------------------------------------------------------*/
// _A=|abs(·)|^2 overwrite the input array
void x86_gr_complex_mag(gr_complex* _A, int32 _cnt) {
float* p = (float*)_A;
for(int i=0;i<_cnt;i++) {
*p = _A[i].real()*_A[i].real() + _A[i].imag()*_A[i].imag();
p++;
}
}
/*----------------------------------------------------------------------------------------------*/
void x86_cmag(CPX *_A, int32 _cnt)
{
int32 lcv, *p;
p = (int32 *)_A;
for(lcv = 0; lcv < _cnt; lcv++)
{
*p = _A[lcv].i*_A[lcv].i + _A[lcv].q*_A[lcv].q;
p++;
}
}
/*----------------------------------------------------------------------------------------------*/
// Find the maximum float in _A[·]
void x86_float_max(float* _A, unsigned int* _index, float* _magt, unsigned int _cnt) {
unsigned int index;
float mag;
mag = index = 0;
for(int i=0; i<_cnt; i++) {
if(_A[i] > mag) {
index = i;
mag = _A[i];
}
}
*_index = index;
*_magt = mag;
}
/*----------------------------------------------------------------------------------------------*/
void x86_max(unsigned int *_A, unsigned int *_index, unsigned int *_magt, unsigned int _cnt)
{
unsigned int lcv, mag, index;
mag = index = 0;
for(lcv = 0; lcv < _cnt; lcv++)
{
if(_A[lcv] > mag)
{
index = lcv;
mag = _A[lcv];
}
}
*_index = index;
*_magt = mag;
}
/*----------------------------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------------------------*/
void x86_prn_accum(CPX *A, CPX *E, CPX *P, CPX *L, int32 cnt, CPX *accum) //!< This is a long story
{
CPX Ea, Pa, La;
int32 lcv;
Ea.i = 0;
Ea.q = 0;
Pa.i = 0;
Pa.q = 0;
La.i = 0;
La.q = 0;
for(lcv = 0; lcv < cnt; lcv++)
{
if(E[lcv].i < 0)
{
Ea.i -= A[lcv].i;
Ea.q -= A[lcv].q;
}
else
{
Ea.i += A[lcv].i;
Ea.q += A[lcv].q;
}
if(P[lcv].i < 0)
{
Pa.i -= A[lcv].i;
Pa.q -= A[lcv].q;
}
else
{
Pa.i += A[lcv].i;
Pa.q += A[lcv].q;
}
if(L[lcv].i < 0)
{
La.i -= A[lcv].i;
La.q -= A[lcv].q;
}
else
{
La.i += A[lcv].i;
La.q += A[lcv].q;
}
}
accum[0].i = Ea.i;
accum[0].q = Ea.q;
accum[1].i = Pa.i;
accum[1].q = Pa.q;
accum[2].i = La.i;
accum[2].q = La.q;
}
/*----------------------------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------------------------*/
void x86_prn_accum_new(CPX *A, MIX *E, MIX *P, MIX *L, int32 cnt, CPX_ACCUM *accum)
{
CPX_ACCUM Ea, Pa, La;
int32 lcv;
Ea.i = 0; Ea.q = 0;
Pa.i = 0; Pa.q = 0;
La.i = 0; La.q = 0;
for(lcv = 0; lcv < cnt; lcv++)
{
Ea.i += A[lcv].i*E[lcv].i;
Ea.q += A[lcv].q*E[lcv].ni;
Pa.i += A[lcv].i*P[lcv].i;
Pa.q += A[lcv].q*P[lcv].ni;
La.i += A[lcv].i*L[lcv].i;
La.q += A[lcv].q*L[lcv].ni;
}
accum[0].i = Ea.i;
accum[0].q = Ea.q;
accum[1].i = Pa.i;
accum[1].q = Pa.q;
accum[2].i = La.i;
accum[2].q = La.q;
}
/*----------------------------------------------------------------------------------------------*/
//int32 x86_acc(int16 *_A, int32 _cnt)
//{
//
// int32 accum = 0;
// int16 *a = _A;
// int32 lcv;
//
// for(lcv = 0; lcv < _cnt; lcv++)
// accum += a[lcv];
//
// return(accum);
//}
//void x86_crot(CPX *_A, CPX *_B, int32 _cnt)
//{
//
// int32 lcv;
// int32 ai, aq;
// int32 bi, bq;
// int32 ti, tq;
//
// bi = _B->i;
// bq = _B->q;
//
// for(lcv = 0; lcv < _cnt; lcv++)
// {
//
// ai = _A[lcv].i;
// aq = _A[lcv].q;
//
// ti = ai*bi-aq*bq;
// tq = ai*bq+aq*bi;
//
// _A[lcv].i = (int16)ti;
// _A[lcv].q = (int16)tq;
// }
//}
//
//void x86_crot(CPX *_A, CPX *_B, int32 _shift, int32 _cnt)
//{
//
// int32 lcv;
// int32 ai, aq;
// int32 bi, bq;
// int32 ti, tq;
// int32 shift;
// int32 round;
//
// shift = _shift;
// round = 1 << (shift-1);
//
// bi = _B->i;
// bq = _B->q;
//
// for(lcv = 0; lcv < _cnt; lcv++)
// {
//
// ai = _A[lcv].i;
// aq = _A[lcv].q;
//
// ti = ai*bi-aq*bq;
// tq = ai*bq+aq*bi;
//
// ti += round;
// tq += round;
//
// ti >>= shift;
// tq >>= shift;
//
// _A[lcv].i = (int16)ti;
// _A[lcv].q = (int16)tq;
// }
//
//}

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#include "gps_sdr_defines.h"
#include "gps_sdr_signal_processing.h"
#include "gr_complex.h"
void x86_add(int16 *A, int16 *B, int32 cnt); //!< Pointwise vector addition
void x86_sub(int16 *A, int16 *B, int32 cnt); //!< Pointwise vector difference
void x86_mul(int16 *A, int16 *B, int32 cnt); //!< Pointwise vector multiply
void x86_muls(int16 *A, int16 *B, int32 cnt, int32 shift); //!< Pointwise vector multiply
int32 x86_dot(int16 *A, int16 *B, int32 cnt); //!< Compute vector dot product
void x86_conj(CPX *A, int32 cnt); //!< Pointwise vector conjugate
void x86_cacc(CPX *A, MIX *B, int32 cnt, int32 *iaccum, int32 *baccum); //!< Compute dot product of cpx and a mix vector
void x86_cmul(CPX *A, CPX *B, int32 cnt); //!< Pointwise vector multiply
void x86_cmuls(CPX *A, CPX *B, int32 cnt, int32 shift); //!< Pointwise complex multiply with shift
void x86_cmulsc(CPX *A, CPX *B, CPX *C, int32 cnt, int32 shift); //!< Pointwise vector multiply with shift, dump results into C
void x86_cmag(CPX *A, int32 cnt); //!< Convert from complex to a power
void x86_prn_accum(CPX *A, CPX *E, CPX *P, CPX *L, int32 cnt, CPX *accum); //!< This is a long story
void x86_prn_accum_new(CPX *A, MIX *E, MIX *P, MIX *L, int32 cnt, CPX_ACCUM *accum); //!< This is a long story
void x86_max(unsigned int *_A, unsigned int *_index, unsigned int *_magt, unsigned int _cnt);
void x86_float_max(float* _A, unsigned int* _index, float* _magt, unsigned int _cnt);
void x86_gr_complex_mag(gr_complex* _A, int32 _cnt);

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project : build-dir ../../../build ;
obj gps_sdr_signal_processing : gps_sdr_signal_processing.cc ;
obj gnss_sdr_valve : gnss_sdr_valve.cc ;
obj pass_through : pass_through.cc ;
obj gps_sdr_fft : gps_sdr_fft.cc ;
obj gps_sdr_simd : gps_sdr_simd.cc ;
obj gps_sdr_x86 : gps_sdr_x86.cc ;

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/*!
* \file pass_through.cc
* \brief Brief description of the file here
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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/>.
*
* -------------------------------------------------------------------------
*/
#include "pass_through.h"
#include <iostream>
#include <gnuradio/gr_io_signature.h>
#include <glog/log_severity.h>
#include <glog/logging.h>
#include "configuration_interface.h"
using google::LogMessage;
PassThrough::PassThrough(ConfigurationInterface* configuration, std::string role,
unsigned int in_streams,
unsigned int out_streams) :
role_(role),
in_streams_(in_streams),
out_streams_(out_streams)
{
std::string default_item_type = "short";
item_type_ = configuration->property(role + ".item_type", default_item_type);
vector_size_ = configuration->property(role + ".vector_size", 1);
if(item_type_.compare("float") == 0)
{
item_size_ = sizeof(float);
}
else if(item_type_.compare("gr_complex") == 0)
{
item_size_ = sizeof(gr_complex);
}
else if(item_type_.compare("short") == 0)
{
item_size_ = sizeof(short);
}
else
{
LOG_AT_LEVEL(WARNING) << item_type_ << " unrecognized item type. Using float";
item_size_ = sizeof(float);
}
kludge_copy_ = gr_make_kludge_copy(item_size_);
DLOG(INFO) << "kludge_copy(" << kludge_copy_->unique_id() << ")";
}
PassThrough::~PassThrough()
{}
void PassThrough::connect(gr_top_block_sptr top_block)
{
DLOG(INFO) << "nothing to connect internally";
}
void PassThrough::disconnect(gr_top_block_sptr top_block)
{
// Nothing to disconnect
}
gr_basic_block_sptr PassThrough::get_left_block()
{
return kludge_copy_;
}
gr_basic_block_sptr PassThrough::get_right_block()
{
return kludge_copy_;
}

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/*!
* \file pass_through.h
* \brief This class represent a block that just puts its input in its
* output.
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
*
*
* -------------------------------------------------------------------------
*
* 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 PASS_THROUGH_H_
#define PASS_THROUGH_H_
#include <gr_hier_block2.h>
#include <gr_kludge_copy.h>
#include <gr_file_sink.h>
#include "gnss_block_interface.h"
class ConfigurationInterface;
class PassThrough : public GNSSBlockInterface
{
public:
PassThrough(ConfigurationInterface* configuration,
std::string role,
unsigned int in_stream,
unsigned int out_stream);
virtual ~PassThrough();
std::string role()
{
return role_;
}
std::string implementation()
{
return "PassThrough";
}
std::string item_type()
{
return item_type_;
}
size_t vector_size()
{
return vector_size_;
}
size_t item_size()
{
return item_size_;
}
void connect(gr_top_block_sptr top_block);
void disconnect(gr_top_block_sptr top_block);
gr_basic_block_sptr get_left_block();
gr_basic_block_sptr get_right_block();
private:
std::string item_type_;
size_t vector_size_;
std::string role_;
unsigned int in_streams_;
unsigned int out_streams_;
gr_kludge_copy_sptr kludge_copy_;
size_t item_size_;
};
#endif /*PASS_THROUGH_H_*/

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/*!
* \file gps_l1_ca_observables.cc
* \brief Brief description of the file here
* \author Javier Arribas, 2011. jarribas(at)cttc.es
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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/>.
*
* -------------------------------------------------------------------------
*/
#include "gps_l1_ca_observables.h"
#include "configuration_interface.h"
#include "gps_l1_ca_observables_cc.h"
#include <gnuradio/gr_io_signature.h>
#include <gnuradio/gr_stream_to_vector.h>
#include <gnuradio/gr_vector_to_stream.h>
#include <glog/log_severity.h>
#include <glog/logging.h>
/* The extern keyword declares a variable or function and specifies
* that it has external linkage (its name is visible from files other
* than the one in which it's defined). When modifying a variable,
* extern specifies that the variable has static duration (it is allocated
* when the program begins and deallocated when the program ends).
* The variable is defined in main.cc
*/
extern concurrent_queue<gps_navigation_message> global_gps_nav_msg_queue;
using google::LogMessage;
GpsL1CaObservables::GpsL1CaObservables(ConfigurationInterface* configuration,
std::string role,
unsigned int in_streams,
unsigned int out_streams,
gr_msg_queue_sptr queue) :
role_(role),
in_streams_(in_streams),
out_streams_(out_streams),
queue_(queue)
{
std::string default_dump_filename = "./observables.dat";
DLOG(INFO) << "role " << role;
dump_ = configuration->property(role + ".dump", false);
dump_filename_ = configuration->property(role + ".dump_filename", default_dump_filename);
fs_in_ = configuration->property(role + ".fs_in", 0);
observables_ = gps_l1_ca_make_observables_cc(in_streams_, queue_, dump_);
observables_->set_fs_in(fs_in_);
DLOG(INFO) << "pseudorange(" << observables_->unique_id() << ")";
// set the navigation msg queue;
observables_->set_navigation_queue(&global_gps_nav_msg_queue);
DLOG(INFO) << "global navigation message queue assigned to observables ("<< observables_->unique_id() << ")";
}
GpsL1CaObservables::~GpsL1CaObservables()
{}
void GpsL1CaObservables::connect(gr_top_block_sptr top_block)
{
// Nothing to connect internally
DLOG(INFO) << "nothing to connect internally";
}
void GpsL1CaObservables::disconnect(gr_top_block_sptr top_block)
{
// Nothing to disconnect
}
gr_basic_block_sptr GpsL1CaObservables::get_left_block()
{
return observables_;
}
gr_basic_block_sptr GpsL1CaObservables::get_right_block()
{
return observables_;
}

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/*!
* \file gps_l1_ca_observables.h
* \brief Brief description of the file here
* \author Javier Arribas, 2011. jarribas(at)cttc.es
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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_OBSERVABLES_H_
#define GPS_L1_CA_OBSERVABLES_H_
#include "observables_interface.h"
#include "gps_l1_ca_observables_cc.h"
#include <gnuradio/gr_msg_queue.h>
class ConfigurationInterface;
class GpsL1CaObservables : public ObservablesInterface
{
public:
GpsL1CaObservables(ConfigurationInterface* configuration,
std::string role,
unsigned int in_streams,
unsigned int out_streams,
gr_msg_queue_sptr queue);
virtual ~GpsL1CaObservables();
std::string role()
{
return role_;
}
std::string implementation()
{
return "observables";
}
void connect(gr_top_block_sptr top_block);
void disconnect(gr_top_block_sptr top_block);
gr_basic_block_sptr get_left_block();
gr_basic_block_sptr get_right_block();
void reset()
{
return;
};
// all blocks must have an intem_size() function implementation
size_t item_size()
{
return sizeof(gr_complex);
}
private:
gps_l1_ca_observables_cc_sptr observables_;
bool dump_;
unsigned int fs_in_;
std::string dump_filename_;
std::string role_;
unsigned int in_streams_;
unsigned int out_streams_;
gr_msg_queue_sptr queue_;
};
#endif

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project : build-dir ../../../../build ;
obj gps_l1_ca_observables : gps_l1_ca_observables.cc ;

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/**
* Copyright notice
*/
/**
* Author: Javier Arribas, 2011. jarribas(at)cttc.es
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <iostream>
#include <sstream>
#include <vector>
#include <map>
#include <algorithm>
# include <bitset>
#include <cmath>
#include "math.h"
#include "gps_l1_ca_observables_cc.h"
#include "control_message_factory.h"
#include <gnuradio/gr_io_signature.h>
#include <glog/log_severity.h>
#include <glog/logging.h>
using google::LogMessage;
using namespace std;
gps_l1_ca_observables_cc_sptr
gps_l1_ca_make_observables_cc(unsigned int nchannels, gr_msg_queue_sptr queue, bool dump) {
return gps_l1_ca_observables_cc_sptr(new gps_l1_ca_observables_cc(nchannels, queue, dump));
}
gps_l1_ca_observables_cc::gps_l1_ca_observables_cc(unsigned int nchannels, gr_msg_queue_sptr queue, bool dump) :
gr_block ("gps_l1_ca_observables_cc", gr_make_io_signature (nchannels, nchannels, sizeof(gnss_synchro)),
gr_make_io_signature(1, 1, sizeof(gr_complex))) {
//TODO: change output channels to have Pseudorange GNURadio signature: nchannels input (float), nchannels output (float)
// initialize internal vars
d_queue = queue;
d_dump = dump;
d_nchannels = nchannels;
d_rinex_printer.set_headers("GNSS-SDR"); //TODO: read filename from config
}
gps_l1_ca_observables_cc::~gps_l1_ca_observables_cc() {
}
bool pairCompare( pair<int,gnss_synchro> a, pair<int,gnss_synchro> b)
{
return a.second.last_preamble_index < b.second.last_preamble_index;
}
int gps_l1_ca_observables_cc::general_work (int noutput_items, gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items, gr_vector_void_star &output_items) {
gnss_synchro **in = (gnss_synchro **) &input_items[0]; //Get the input samples pointer
// CONSTANTS TODO: place in a file
const float code_length_s=0.001; //1 ms
const float C_m_ms= GPS_C_m_s/1000; // The speed of light, [m/ms]
const float nav_sol_period_ms=1000;
//--- Find number of samples per spreading code ----------------------------
const signed int codeFreqBasis=1023000; //Hz
const signed int codeLength=1023;
const unsigned int samples_per_code = round(d_fs_in/ (codeFreqBasis / codeLength));
map<int,gnss_synchro> gps_words;
map<int,gnss_synchro>::iterator gps_words_iter;
map<int,float> pseudoranges;
map<int,float>::iterator pseudoranges_iter;
unsigned long int min_preamble_index;
float prn_delay_ms;
float traveltime_ms;
float pseudorange_m;
for (unsigned int i=0; i<d_nchannels ; i++)
{
if (in[i][0].valid_word) //if this channel have valid word
{
gps_words.insert(pair<int,gnss_synchro>(in[i][0].satellite_PRN,in[i][0])); //record the word structure in a map for pseudoranges
}
}
if(gps_words.size()>0)
{
// find the minimum index (nearest satellite, will be the reference)
gps_words_iter=min_element(gps_words.begin(),gps_words.end(),pairCompare);
min_preamble_index=gps_words_iter->second.last_preamble_index;
//compute the pseudoranges
for(gps_words_iter = gps_words.begin(); gps_words_iter != gps_words.end(); gps_words_iter++)
{
prn_delay_ms=gps_words_iter->second.prn_delay/(float)samples_per_code;
traveltime_ms=(float)(1000*(gps_words_iter->second.last_preamble_index-min_preamble_index))/(float)samples_per_code+GPS_STARTOFFSET_ms+prn_delay_ms;
//cout<<"traveltime ms"<<gps_words_iter->first<<" ="<<traveltime_ms<<endl;
pseudorange_m=traveltime_ms*C_m_ms;
pseudoranges.insert(pair<int,float>(gps_words_iter->first,pseudorange_m)); //record the preamble index in a map
}
// write the pseudoranges to RINEX OBS file
// 1- need a valid clock
if (d_last_nav_msg.d_satellite_PRN>0)
{
std::cout<<"d_inter_frame_sec_counter="<<d_inter_frame_sec_counter<<std::endl;
d_rinex_printer.LogRinex2Obs(d_last_nav_msg,d_inter_frame_sec_counter,pseudoranges);
}
d_inter_frame_sec_counter+=((float)NAVIGATION_OUTPUT_RATE_MS)/1000.0; //TODO: synchronize the gps time of the ephemeris with the obs
}
//debug
cout << setprecision(16);
for(pseudoranges_iter = pseudoranges.begin();
pseudoranges_iter != pseudoranges.end();
pseudoranges_iter++)
{
cout<<"Pseudoranges =("<<pseudoranges_iter->first<<","<<pseudoranges_iter->second<<")"<<endl;
}
gps_navigation_message nav_msg;
if (d_nav_queue->try_pop(nav_msg)==true)
{
cout<<"New ephemeris record has arrived!"<<endl;
cout<<"d_channel_ID="<<nav_msg.d_channel_ID<<endl;
cout<<"d_satellite_PRN="<<nav_msg.d_satellite_PRN<<endl;
cout<<"d_satpos_X="<<nav_msg.d_satpos_X<<endl;
cout<<"d_satpos_Y="<<nav_msg.d_satpos_Y<<endl;
cout<<"d_satpos_Z="<<nav_msg.d_satpos_Z<<endl;
cout<<"d_master_clock="<<nav_msg.d_master_clock<<endl;
cout<<"d_satClkCorr="<<nav_msg.d_satClkCorr<<endl;
cout<<"d_dtr="<<nav_msg.d_dtr<<endl;
// write ephemeris to RINES NAV file
// TODO: check operation ok
d_last_nav_msg=nav_msg;
d_inter_frame_sec_counter=0; //reset the interframe seconds counter
d_rinex_printer.LogRinex2Nav(nav_msg);
}
consume_each(1); //one by one
return 0;
}

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/**
* Copyright notice
*/
/**
* Author: Javier Arribas, 2011. jarribas(at)cttc.es
*/
#ifndef GPS_L1_CA_OBSERVABLES_CC_H
#define GPS_L1_CA_OBSERVABLES_CC_H
#include <fstream>
#include <gnuradio/gr_block.h>
#include <gnuradio/gr_msg_queue.h>
#include <queue>
#include <boost/thread/mutex.hpp>
#include <boost/thread/thread.hpp>
#include "concurrent_queue.h"
#include "gps_navigation_message.h"
#include "rinex_2_1_printer.h"
#include "GPS_L1_CA.h"
class gps_l1_ca_observables_cc;
typedef boost::shared_ptr<gps_l1_ca_observables_cc> gps_l1_ca_observables_cc_sptr;
gps_l1_ca_observables_cc_sptr
gps_l1_ca_make_observables_cc(unsigned int n_channels, gr_msg_queue_sptr queue, bool dump);
class gps_l1_ca_observables_cc : public gr_block {
private:
friend gps_l1_ca_observables_cc_sptr
gps_l1_ca_make_observables_cc(unsigned int nchannels, gr_msg_queue_sptr queue, bool dump);
gps_l1_ca_observables_cc(unsigned int nchannels, gr_msg_queue_sptr queue, bool dump);
// class private vars
gr_msg_queue_sptr d_queue;
bool d_dump;
unsigned int d_nchannels;
unsigned long int d_fs_in;
std::string d_dump_filename;
std::ofstream d_dump_file;
concurrent_queue<gps_navigation_message> *d_nav_queue; // Navigation ephemeris queue
rinex_printer d_rinex_printer; // RINEX printer class
double d_inter_frame_sec_counter; // counter for seconds between GPS frames
gps_navigation_message d_last_nav_msg; //last navigation message
public:
~gps_l1_ca_observables_cc ();
void set_navigation_queue(concurrent_queue<gps_navigation_message> *nav_queue){d_nav_queue=nav_queue;}
void set_fs_in(unsigned long int fs_in) {d_fs_in=fs_in;};
int general_work (int noutput_items, gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items, gr_vector_void_star &output_items);
};
#endif

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project : build-dir ../../../../build ;
obj gps_l1_ca_observables_cc : gps_l1_ca_observables_cc.cc ;

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build-project adapters ;
build-project gnuradio_blocks ;
build-project libs ;

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project : build-dir ../../../../build ;
obj rinex_2_1_printer : rinex_2_1_printer.cc ;

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#include "rinex_2_1_printer.h"
void rinex_printer::set_headers(std::string file_name)
{
correccio_primera_obs=1;
fp_rin = fopen((file_name+".09o").c_str(),"wt");
fp_rin_end = ftell(fp_rin);
fp_rin2 = fopen((file_name+".09n").c_str(),"wt");
fp_rin_end2 = ftell(fp_rin2);
// write RINEX headers
Rinex2ObsHeader();
Rinex2NavHeader();
}
rinex_printer::rinex_printer ()
{
}
rinex_printer::~rinex_printer ()
{
fclose(fp_rin);
fclose(fp_rin2);
}
void rinex_printer::Rinex2NavHeader()
{
if(fp_rin2 != NULL)
{
//calculate UTC_TIME
time_t tiempo;
char cad[80];
struct tm *tmPtr;
tiempo = time(NULL);
tmPtr = gmtime(&tiempo);
strftime( cad, 20, "%d-%b-%y %H:%M", tmPtr );
fseek(fp_rin2, fp_rin_end2, SEEK_SET);
//fprintf(fp_rin2,"----|---1|0---|---2|0---|---3|0---|---4|0---|---5|0---|---6|0---|---7|0---|---8|\n\n");
fprintf(fp_rin2," 2.10 NAVIGATION DATA RINEX VERSION / TYPE\n");
fprintf(fp_rin2,"GNSS-SDR-mercurio CTTC %s PGM / RUN BY / DATE\n",cad);
//fprintf(fp_rin2,"CTTC MARKER NAME\n");
//fprintf(fp_rin2,"0000 MARKERNUMBER\n");
fp_rin_end2 = ftell(fp_rin2);
correccio_primera_obs=1;
}
}
void rinex_printer::LogRinex2Nav(gps_navigation_message nav_msg){
if(fp_rin2 != NULL)
{
//double decimalday,daydecimalhour,decimalhour,decimalmin,decimalsec;
//double day,hour,minutes,seconds,enterseconds,a;
double gpstime;
struct tm *tmPtr;
time_t temps;
//1-Calcul data i hora gps
//Calculo el any,mes i dia a partir de l'hora UTC
//calculate UTC_TIME
char cad1[80];
char cad2[80];
//calculate date of gps time:
double setmanes=nav_msg.d_GPS_week+1024;
//Days & weeks between 00h 1 Jan 1970 and 00h 6 Jan 1980
//520 weeks and 12 days.
gpstime=nav_msg.d_master_clock;
temps=(520+setmanes)*7*24*3600+gpstime+17*24*3600;
tmPtr = gmtime(&temps);
strftime( cad1, 20, "%y %m %d", tmPtr );
//std::cout<<"gps_time="<<cad1<<std::endl;
sprintf(cad2,"%2.0f %2.0f %3.1f",(double)tmPtr->tm_hour,(double)tmPtr->tm_min,(double)tmPtr->tm_sec);
if(correccio_primera_obs==1){
//Escriure CORRECCIO DE TEMPS GPS a0 i a1;
fseek(fp_rin2, fp_rin_end2, SEEK_SET);
char correction[256],correction2[256];
double A0,A1;
/* 8.3819D-09 -7.4506D-09 -5.9605D-08 5.9605D-08 ION ALPHA
8.8 064D+04 -3.2768D+04 -1.9661D+05 1.9661D+05 ION BETA
5. 587935447693D-09 8.881784197001D-15 233472 1518 DELTA-UTC: A0,A1,T,W*/
A0=587.935447693E-09;
A1=8.881784197001E-15;
sprintf(correction,"%19.12E",A0);
sprintf(correction2,"%19.12E",A1);
double alpha0,alpha1,alpha2,alpha3,beta0,beta1,beta2,beta3;
alpha0=8.3819E-09;
alpha1=-7.4506E-09;
alpha2=-5.9605E-08;
alpha3=5.9605E-08;
beta0=064E+04;
beta1=-3.2768E+04;
beta2=-1.9661E+05;
beta3= 1.9661E+05;
//Format(&correction[0],1);
//Format(&correction2[0],1);
//fp_rin_correction_time = ftell(fp_rin2);
// fprintf(fp_rin2," %12.4E%12.4E%12.4E%12.4E ION ALPHA\n",alpha0,alpha1,alpha2,alpha3);
// fprintf(fp_rin2," %12.4E%12.4E%12.4E%12.4E ION BETA\n",beta0,beta1,beta2,beta3);
fprintf(fp_rin2," %s%s%9.0f%9d DELTA-UTC: A0,A1,T,W\n",correction,correction2,gpstime,(int)nav_msg.d_GPS_week+1024);
fprintf(fp_rin2," 15 LEAP SECONDS\n");
fprintf(fp_rin2," END OF HEADER\n");
fp_rin_end2 = ftell(fp_rin2);
correccio_primera_obs=0;
}
//preparacio lines de efemerides per imprimir!!!
char linia0[256],linia1[256],linia2[256],linia3[256],linia4[256],linia5[256],linia6[256],linia7[256];
char idef[256];
sprintf(idef,"%2.0d",nav_msg.d_satellite_PRN);
sprintf(linia0,"%19.12E%19.12E%19.12E",nav_msg.d_A_f0,nav_msg.d_A_f1,nav_msg.d_A_f2);
sprintf(linia1,"%19.12E%19.12E%19.12E%19.12E",nav_msg.d_IODE_SF2,nav_msg.d_Crs,nav_msg.d_Delta_n,nav_msg.d_M_0);
sprintf(linia2,"%19.12E%19.12E%19.12E%19.12E",nav_msg.d_Cuc,nav_msg.d_e_eccentricity,nav_msg.d_Cus,nav_msg.d_sqrt_A);
sprintf(linia3,"%19.12E%19.12E%19.12E%19.12E",nav_msg.d_Toe,nav_msg.d_Cic,nav_msg.d_OMEGA0,nav_msg.d_Cis);
sprintf(linia4,"%19.12E%19.12E%19.12E%19.12E",nav_msg.d_i_0,nav_msg.d_Crc,nav_msg.d_OMEGA,nav_msg.d_OMEGA_DOT);
sprintf(linia5,"%19.12E%19.12E%19.12E%19.12E",nav_msg.d_IDOT,0.0,nav_msg.d_GPS_week+1024.0,0.0);//CodeL2, L2pData
sprintf(linia6,"%19.12E%19.12E%19.12E%19.12E",nav_msg.d_SV_accuracy,nav_msg.d_SV_health,nav_msg.d_TGD,nav_msg.d_IODC);
sprintf(linia7,"%19.12E%19.12E",nav_msg.d_TOW,0.0); //fit interval is set to 0
fseek(fp_rin2, fp_rin_end2, SEEK_SET);
fprintf(fp_rin2,"%s %s %s%s\n",idef,cad1,cad2,linia0);
fprintf(fp_rin2," %s\n",linia1);
fprintf(fp_rin2," %s\n",linia2);
fprintf(fp_rin2," %s\n",linia3);
fprintf(fp_rin2," %s\n",linia4);
fprintf(fp_rin2," %s\n",linia5);
fprintf(fp_rin2," %s\n",linia6);
fprintf(fp_rin2," %s\n",linia7);
fp_rin_end2 = ftell(fp_rin2);
}
}
void rinex_printer::Rinex2ObsHeader()
{
//Clock_S *pClock = &tNav.master_clock; /* Clock solution */
if(fp_rin != NULL)
{
//calculate UTC_TIME
time_t tiempo;
char cad[80];
struct tm *tmPtr;
tiempo = time(NULL);
tmPtr = gmtime(&tiempo);
strftime( cad, 24, "%d/%m/%Y %H:%M:%S", tmPtr );
fseek(fp_rin, fp_rin_end, SEEK_SET);
//fprintf(fp_rin,"----|---1|0---|---2|0---|---3|0---|---4|0---|---5|0---|---6|0---|---7|0---|---8|\n\n");
fprintf(fp_rin," 2.10 Observation G (GPS) RINEX VERSION / TYPE\n");
fprintf(fp_rin,"GNSS-SDR-mercurio CTTC %s PGM / RUN BY / DATE\n",cad);
fprintf(fp_rin,"CTTC MARKER NAME\n");
//fprintf(fp_rin,"0000 MARKERNUMBER\n");
fprintf(fp_rin,"JAVIER ARRIBAS CTTC OBSERVER / AGENCY\n");
fprintf(fp_rin,"GNSS-SDR-mercurio SDR 1.0 REC # / TYPE / VERS\n");
fprintf(fp_rin,"0000000000 CTTC00000.00 ANT # / TYPE\n");
fprintf(fp_rin," 4797642.2790 166436.1500 4185504.6370 APPROX POSITION XYZ\n");
fprintf(fp_rin," 0.0000 0.0000 0.0000 ANTENNA: DELTA H/E/N\n");
fprintf(fp_rin," 1 0 WAVELENGTH FACT L1/2\n");
fprintf(fp_rin," 2 C1 L1 # / TYPES OF OBSERV\n");
fprintf(fp_rin," 0.1000 INTERVAL\n");
//INTRODUIR HORA PRIMERA OBSERVACIO
//ho escriure un cop hagi adquirit dades
//fprintf(fp_rin," 2001 3 24 13 10 36.0000000 TIME OF FIRST OBS\n");
//fprintf(fp_rin," END OF HEADER\n");
fp_rin_end = ftell(fp_rin);
temps_primera_obs=1;
}
}
void rinex_printer::LogRinex2Obs(gps_navigation_message nav_msg,double interframe_seconds, std::map<int,float> pseudoranges)
{
int ss;
char sat_vis[36];
for(int i=0;i<36;i++) sat_vis[i]=' ';
char packet[80];
int index=0;
char cad[2];
double setmanes;
std::map<int,float>::iterator pseudoranges_iter;
//necessito
//1-Data i hora<--- de struct Clock_S
//2-#sat visibles, identificador dat visibles-----> de Com fa a LogNav() // (Chan_Packet_S *) &tChan[lcv]->sv
//3-pseudodistancia de cada satèl·lit ----> Com fa a LogPseudo(), tb es pot treure la carrier_phase. Serveix per algo??
//4- El punt 1 i 2 s'han d'escriure a la mateixa línia. El punt 3 una línia per a cada satèl·lit.
if(fp_rin != NULL)
{
setmanes=nav_msg.d_GPS_week + 1024;
//1-Calcul data i hora gps
//Calculo el any,mes i dia a partir de l'hora UTC
//calculate UTC_TIME
time_t temps;
char cad1[80];
char cad2[80];
char cad3[80];
char cad4[80];
struct tm *tmPtr;
//Calculo hora, minut, segons a partir de pClocK.time =hora GPS
double decimalday,daydecimalhour,decimalhour,decimalmin,decimalsec;
double day,hour,minutes,seconds,enterseconds,a;
double gpstime;
gpstime=nav_msg.d_master_clock;
//calculate date of gps time:
//Days & weeks between 00h 1 Jan 1970 and 00h 6 Jan 1980
//520 weeks and 12 days.
temps=(520+setmanes)*7*24*3600+gpstime+17*24*3600;
tmPtr = gmtime(&temps);
strftime( cad1, 20, " %y %m %d", tmPtr );
strftime( cad2, 20, " %Y %m %d", tmPtr );
decimalday=((gpstime+interframe_seconds)/(24*3600));//Dies dins de la semana
daydecimalhour=modf(decimalday,&day);//day=#dies sencers, daydecimalhour=porcio de dia
daydecimalhour=daydecimalhour*24;//porcio de dia en hores
decimalhour=modf(daydecimalhour,&hour);//hour=hora del dia; decimalhour=porcio d'hora
decimalmin=decimalhour*60;//decimalmin=minuts del dia amb decimal
decimalsec=modf(decimalmin,&minutes);//minutes=minuts del dia enters,decimalsec=porcio de minuts
seconds=decimalsec*60;//seconds=segons del dia en decimal
a=modf(seconds,&enterseconds);
sprintf(cad4,"%6.0f%6.0f%13.7f",hour,minutes,seconds);
sprintf(cad3," %2.0f %2.0f%11.7f",hour,minutes,seconds);
//TODO: Include receiver clock offset
if(temps_primera_obs==1){
//Escriure Hora Primera Observació
fseek(fp_rin, fp_rin_end, SEEK_SET);
fprintf(fp_rin,"%s%s GPS TIME OF FIRST OBS\n",cad2,cad4);
fprintf(fp_rin,"00000CTTC MARKER NUMBER\n");
//fprintf(fp_rin,"Edited by .... COMMENT\n");
fprintf(fp_rin," END OF HEADER\n");
fp_rin_end = ftell(fp_rin);
temps_primera_obs=0;
}
//2-Num sat visibles i identificador
signed long int nsvs = 0;
//3-Escriure pseudodistancia
for(pseudoranges_iter = pseudoranges.begin();
pseudoranges_iter != pseudoranges.end();
pseudoranges_iter++)
{
//PER FORMAT RINEX2
nsvs++;
sprintf(cad,"%2.0f",(double)pseudoranges_iter->first); //satellite PRN ID
int k=3*index;
sat_vis[k]='G';
sat_vis[k+1]=cad[0];
sat_vis[k+2]=cad[1];
index++;
}
//sat_vis tinc vector de identif de sat visibles
//Per format RINEX2
//sprintf(packet,"%s%s 0%3d%s%12.9f",cad1,cad3,nsvs,sat_vis,offset);
sprintf(packet,"%s%s 0%3d%s",cad1,cad3,nsvs,sat_vis);
packet[69]=packet[68];
packet[68]=' ';
fseek(fp_rin, fp_rin_end, SEEK_SET);
fprintf(fp_rin,"%s\n",packet);
fp_rin_end = ftell(fp_rin);
//3-Escriure pseudodistancia
for(pseudoranges_iter = pseudoranges.begin();
pseudoranges_iter != pseudoranges.end();
pseudoranges_iter++)
{
ss=signalstrength(54.00); // TODO: include estimated signal strength
fseek(fp_rin, fp_rin_end, SEEK_SET);
fprintf(fp_rin,"%14.3f %14.3f %d\n",pseudoranges_iter->second,0.0,ss); //TODO: include the carrier phase
fp_rin_end = ftell(fp_rin);
}
}
}
int rinex_printer::signalstrength( double snr)
{
int ss;
if(snr<=12.00) ss=1;
else if(snr>12.00 && snr<=18.00) ss=2;
else if(snr>18.00 && snr<=24.00) ss=3;
else if(snr>24.00 && snr<=30.00) ss=4;
else if(snr>30.00 && snr<=36.00) ss=5;
else if(snr>36.00 && snr<=42.00) ss=6;
else if(snr>42.00 && snr<=48.00) ss=7;
else if(snr>48.00 && snr<=54) ss=8;
else if(snr>=54.00) ss=9;
return (ss);
}

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/**
* Copyright notice
*/
/**
* Author: Javier Arribas, 2011. jarribas(at)cttc.es
* Luis Esteve, 2011. luis(at)epsilon-formacion.com
*/
#ifndef RINEX_PRINTER_H_
#define RINEX_PRINTER_H_
#include <string>
#include <iostream>
#include <sstream>
#include <stdlib.h>
#include <stdio.h>
#include <sys/time.h>
#include <time.h>
#include <math.h>
#include <map>
#include <algorithm>
#include "gps_navigation_message.h"
class rinex_printer
{
private:
int temps_primera_obs; //per saber si he escrit el temps de la primera observació.
int correccio_primera_obs; //per saber si he escrit l correccio de temps de la primera observació.
int primeravegada;//per evitar problemes primera pseudodistancia
int PERMIS_RINEX; //PER DEIXAR ESCRIURE PER PRIMERA VEGADA AL RINEX
FILE *fp_rin; //!< RINEX OBS FILE Output
FILE *fp_rin2; //!< RINEX NAV FILE Output
unsigned long int fp_rin_end; //!< Hold place of last RINEX OBS FILE pointer, minus the header
unsigned long int fp_rin_end2; //!< Hold place of last RINEX NAV FILE pointer, minus the header
int signalstrength( double snr);
void Rinex2ObsHeader();
void Rinex2NavHeader();
public:
void set_headers(std::string file_name);
void LogRinex2Nav(gps_navigation_message nav_msg);
void LogRinex2Obs(gps_navigation_message nav_msg,double interframe_seconds, std::map<int,float> pseudoranges);
rinex_printer();
~rinex_printer();
};
#endif

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/*!
* \file file_output_filter.cc
* \brief Brief description of the file here
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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/>.
*
* -------------------------------------------------------------------------
*/
#include "file_output_filter.h"
#include <glog/log_severity.h>
#include <glog/logging.h>
#include <gr_io_signature.h>
#include "configuration_interface.h"
using google::LogMessage;
FileOutputFilter::FileOutputFilter(ConfigurationInterface* configuration,
std::string role,
unsigned int in_streams,
unsigned int out_streams) :
role_(role),
in_streams_(in_streams),
out_streams_(out_streams)
{
std::string default_filename = "./data/signal.dat";
std::string default_item_type = "short";
filename_ = configuration->property(role + ".filename", default_filename);
item_type_ = configuration->property(role + ".item_type", default_item_type);
if(item_type_.compare("gr_complex") == 0)
{
item_size_ = sizeof(gr_complex);
}
else if(item_type_.compare("float") == 0)
{
item_size_ = sizeof(float);
}
else if(item_type_.compare("short") == 0)
{
item_size_ = sizeof(short);
}
else
{
LOG_AT_LEVEL(WARNING) << item_type_ << " Unrecognized item type. Using short.";
item_size_ = sizeof(short);
}
file_sink_ = gr_make_file_sink(item_size_, filename_.c_str());
DLOG(INFO) << "file sink(" << file_sink_->unique_id() << ")";
}
FileOutputFilter::~FileOutputFilter()
{}
void FileOutputFilter::connect(gr_top_block_sptr top_block)
{
DLOG(INFO) << "nothing to connect internally";
}
void FileOutputFilter::disconnect(gr_top_block_sptr top_block)
{
// Nothing to disconnect internally
}
gr_basic_block_sptr FileOutputFilter::get_left_block()
{
return file_sink_;
}
gr_basic_block_sptr FileOutputFilter::get_right_block()
{
return file_sink_;
}

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/*!
* \file file_output_filter.h
* \brief This class represents an output filter that sends its output
* to a file without any change in the data format.
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
*
*
*
* -------------------------------------------------------------------------
*
* 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 GNSS_SDR_FILE_OUTPUT_FILTER_H_
#define GNSS_SDR_FILE_OUTPUT_FILTER_H_
#include "gnss_block_interface.h"
#include <gr_file_sink.h>
class ConfigurationInterface;
class FileOutputFilter : public GNSSBlockInterface
{
public:
FileOutputFilter(ConfigurationInterface* configuration,
std::string role,
unsigned int in_streams,
unsigned int out_streams);
virtual ~FileOutputFilter();
std::string role()
{
return role_;
}
std::string implementation()
{
return "FileOutputFilter";
}
size_t item_size()
{
return item_size_;
}
void connect(gr_top_block_sptr top_block);
void disconnect(gr_top_block_sptr top_block);
gr_basic_block_sptr get_left_block();
gr_basic_block_sptr get_right_block();
private:
gr_file_sink_sptr file_sink_;
size_t item_size_;
std::string filename_;
std::string item_type_;
std::string role_;
unsigned int in_streams_;
unsigned int out_streams_;
};
#endif /*GNSS_SDR_FILE_OUTPUT_FILTER_H_*/

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project : build-dir ../../../../build ;
obj file_output_filter : file_output_filter.cc ;
obj null_sink_output_filter : null_sink_output_filter.cc ;

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/*!
* \file null_sink_output_filter.cc
* \brief Brief description of the file here
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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/>.
*
* -------------------------------------------------------------------------
*/
#include "null_sink_output_filter.h"
#include <glog/log_severity.h>
#include <glog/logging.h>
#include <gr_io_signature.h>
#include "configuration_interface.h"
using google::LogMessage;
NullSinkOutputFilter::NullSinkOutputFilter(ConfigurationInterface* configuration,
std::string role,
unsigned int in_streams,
unsigned int out_streams) :
role_(role),
in_streams_(in_streams),
out_streams_(out_streams)
{
std::string default_item_type = "short";
item_type_ = configuration->property(role + ".item_type", default_item_type);
if(item_type_.compare("gr_complex") == 0)
{
item_size_ = sizeof(gr_complex);
}
else if(item_type_.compare("short") == 0)
{
item_size_ = sizeof(short);
}
else if(item_type_.compare("float") == 0)
{
item_size_ = sizeof(float);
}
else
{
LOG_AT_LEVEL(WARNING) << item_type_ << " unrecognized item type. Usign float";
item_size_ = sizeof(float);
}
sink_ = gr_make_null_sink(item_size_);
DLOG(INFO) << "null_sink(" << sink_->unique_id() << ")";
}
NullSinkOutputFilter::~NullSinkOutputFilter()
{}
void NullSinkOutputFilter::connect(gr_top_block_sptr top_block)
{
DLOG(INFO) << "nothing to connect internally";
}
void NullSinkOutputFilter::disconnect(gr_top_block_sptr top_block)
{
// Nothing to connect
}
gr_basic_block_sptr NullSinkOutputFilter::get_left_block()
{
return sink_;
}
gr_basic_block_sptr NullSinkOutputFilter::get_right_block()
{
LOG_AT_LEVEL(WARNING) << "Right block of a signal sink should not be retrieved";
return gr_block_sptr();
}

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/*!
* \file null_sink_output_filter.h
* \brief Brief description of the file here
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
*
* This class represents an implementation of an output filter that
* sends its input to a null sink.
*
* -------------------------------------------------------------------------
*
* 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 NULL_SINK_OUTPUT_FILTER_H_
#define NULL_SINK_OUTPUT_FILTER_H_
#include "gnss_block_interface.h"
#include <gr_null_sink.h>
class ConfigurationInterface;
class NullSinkOutputFilter : public GNSSBlockInterface
{
public:
NullSinkOutputFilter(ConfigurationInterface* configuration,
std::string role,
unsigned int in_streams,
unsigned int out_streams);
virtual ~NullSinkOutputFilter();
std::string item_type()
{
return item_type_;
}
std::string role()
{
return role_;
}
std::string implementation()
{
return "NullSinkOutputFilter";
}
size_t item_size()
{
return item_size_;
}
void connect(gr_top_block_sptr top_block);
void disconnect(gr_top_block_sptr top_block);
gr_basic_block_sptr get_left_block();
gr_basic_block_sptr get_right_block();
private:
gr_block_sptr sink_;
size_t item_size_;
std::string item_type_;
std::string role_;
unsigned int in_streams_;
unsigned int out_streams_;
};
#endif /*NULL_SINK_OUTPUT_FILTER_H_*/

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build-project adapters ;
# build-project gnuradio_blocks ;

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/*!
* \file file_signal_source.cc
* \brief Brief description of the file here
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
* Javier Arribas, 2011 jarribas(at)cttc.es
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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/>.
*
* -------------------------------------------------------------------------
*/
#include "file_signal_source.h"
#include "gnss_sdr_valve.h"
#include "configuration_interface.h"
#include <string>
#include <iostream>
#include <glog/log_severity.h>
#include <glog/logging.h>
#include <gnuradio/gr_io_signature.h>
using google::LogMessage;
FileSignalSource::FileSignalSource(ConfigurationInterface* configuration,
std::string role, unsigned int in_streams, unsigned int out_streams,
gr_msg_queue_sptr queue) :
role_(role), in_streams_(in_streams), out_streams_(out_streams), queue_(
queue)
{
std::string default_filename = "./signal_samples/signal.dat";
std::string default_item_type = "short";
std::string default_dump_filename = "./data/signal_source.dat";
samples_ = configuration->property(role + ".samples", 0);
sampling_frequency_ = configuration->property(role
+ ".sampling_frequency", 0);
filename_ = configuration->property(role + ".filename", default_filename);
item_type_ = configuration->property(role + ".item_type",
default_item_type);
repeat_ = configuration->property(role + ".repeat", false);
dump_ = configuration->property(role + ".dump", false);
dump_filename_ = configuration->property(role + ".dump_filename",
default_dump_filename);
enable_throttle_control_ = configuration->property(role
+ ".enable_throttle_control", false);
if (item_type_.compare("gr_complex") == 0)
{
item_size_ = sizeof(gr_complex);
}
else if (item_type_.compare("float") == 0)
{
item_size_ = sizeof(float);
}
else if (item_type_.compare("short") == 0)
{
item_size_ = sizeof(short);
}
else
{
LOG_AT_LEVEL(WARNING) << item_type_
<< " unrecognized item type. Using short.";
item_size_ = sizeof(short);
}
file_source_
= gr_make_file_source(item_size_, filename_.c_str(), repeat_);
DLOG(INFO) << "file_source(" << file_source_->unique_id() << ")";
// if samples != 0 then enable a flow valve to stop the process after n samples
if (samples_ != 0)
{
valve_ = gnss_sdr_make_valve(item_size_, samples_, queue_);
DLOG(INFO) << "valve(" << valve_->unique_id() << ")";
}
if (dump_)
{
sink_ = gr_make_file_sink(item_size_, dump_filename_.c_str());
DLOG(INFO) << "file_sink(" << sink_->unique_id() << ")";
}
if (enable_throttle_control_)
{
throttle_ = gr_make_throttle(item_size_, sampling_frequency_);
}
DLOG(INFO) << "File source filename " << filename_;
DLOG(INFO) << "Samples " << samples_;
DLOG(INFO) << "Sampling frequency " << sampling_frequency_;
DLOG(INFO) << "Item type " << item_type_;
DLOG(INFO) << "Item size " << item_size_;
DLOG(INFO) << "Repeat " << repeat_;
DLOG(INFO) << "Dump " << dump_;
DLOG(INFO) << "Dump filename " << dump_filename_;
}
FileSignalSource::~FileSignalSource()
{
}
void FileSignalSource::connect(gr_top_block_sptr top_block)
{
if (samples_ != 0)
{
if (enable_throttle_control_ == true)
{
top_block->connect(file_source_, 0, throttle_, 0);
DLOG(INFO) << "connected file source to throttle";
top_block->connect(throttle_, 0, valve_, 0);
DLOG(INFO) << "connected throttle to valve";
if (dump_)
{
top_block->connect(valve_, 0, sink_, 0);
DLOG(INFO) << "connected valve to file sink";
}
}
else
{
top_block->connect(file_source_, 0, valve_, 0);
DLOG(INFO) << "connected file source to valve";
if (dump_)
{
top_block->connect(valve_, 0, sink_, 0);
DLOG(INFO) << "connected valve to file sink";
}
}
}
else
{
if (enable_throttle_control_ == true)
{
top_block->connect(file_source_, 0, throttle_, 0);
DLOG(INFO) << "connected file source to throttle";
if (dump_)
{
top_block->connect(file_source_, 0, sink_, 0);
DLOG(INFO) << "connected file source to sink";
}
}
else
{
if (dump_)
{
top_block->connect(file_source_, 0, sink_, 0);
DLOG(INFO) << "connected file source to sink";
}
}
}
}
void FileSignalSource::disconnect(gr_top_block_sptr top_block)
{
if (samples_ != 0)
{
if (enable_throttle_control_ == true)
{
top_block->disconnect(file_source_, 0, throttle_, 0);
DLOG(INFO) << "disconnected file source to throttle";
top_block->disconnect(throttle_, 0, valve_, 0);
DLOG(INFO) << "disconnected throttle to valve";
if (dump_)
{
top_block->disconnect(valve_, 0, sink_, 0);
DLOG(INFO) << "disconnected valve to file sink";
}
}
else
{
top_block->disconnect(file_source_, 0, valve_, 0);
DLOG(INFO) << "disconnected file source to valve";
if (dump_)
{
top_block->disconnect(valve_, 0, sink_, 0);
DLOG(INFO) << "disconnected valve to file sink";
}
}
}
else
{
if (enable_throttle_control_ == true)
{
top_block->disconnect(file_source_, 0, throttle_, 0);
DLOG(INFO) << "disconnected file source to throttle";
if (dump_)
{
top_block->disconnect(file_source_, 0, sink_, 0);
DLOG(INFO) << "disconnected file source to sink";
}
}
else
{
if (dump_)
{
top_block->disconnect(file_source_, 0, sink_, 0);
DLOG(INFO) << "disconnected file source to sink";
}
}
}
}
gr_basic_block_sptr FileSignalSource::get_left_block()
{
LOG_AT_LEVEL(WARNING)
<< "Left block of a signal source should not be retrieved";
return gr_block_sptr();
}
gr_basic_block_sptr FileSignalSource::get_right_block()
{
if (samples_ != 0)
{
return valve_;
}
else
{
if (enable_throttle_control_ == true)
{
return throttle_;
}
else
{
return file_source_;
}
}
}

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/*!
* \file file_signal_source.h
* \brief Brief description of the file here
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
*
* This class represents a file signal source. Internally it uses a GNU Radio's gr_file_source
* a a connector to the data.
*
* -------------------------------------------------------------------------
*
* 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 FILE_SIGNAL_SOURCE_H_
#define FILE_SIGNAL_SOURCE_H_
#include "gnss_block_interface.h"
#include <gnuradio/gr_file_source.h>
#include <gnuradio/gr_file_sink.h>
#include <gnuradio/gr_throttle.h>
#include <gnuradio/gr_hier_block2.h>
#include <gnuradio/gr_msg_queue.h>
class ConfigurationInterface;
class FileSignalSource: public GNSSBlockInterface
{
public:
FileSignalSource(ConfigurationInterface* configuration, std::string role,
unsigned int in_streams, unsigned int out_streams,
gr_msg_queue_sptr queue);
virtual ~FileSignalSource();
std::string role()
{
return role_;
}
std::string implementation()
{
return "FileSignalSource";
}
size_t item_size()
{
return item_size_;
}
void connect(gr_top_block_sptr top_block);
void disconnect(gr_top_block_sptr top_block);
gr_basic_block_sptr get_left_block();
gr_basic_block_sptr get_right_block();
std::string filename()
{
return filename_;
}
std::string item_type()
{
return item_type_;
}
bool repeat()
{
return repeat_;
}
long sampling_frequency()
{
return sampling_frequency_;
}
long samples()
{
return samples_;
}
private:
long samples_;
long sampling_frequency_;
std::string filename_;
std::string item_type_;
bool repeat_;
bool dump_;
std::string dump_filename_;
std::string role_;
unsigned int in_streams_;
unsigned int out_streams_;
gr_file_source_sptr file_source_;
gr_block_sptr valve_;
gr_block_sptr sink_;
gr_block_sptr throttle_;
gr_msg_queue_sptr queue_;
size_t item_size_;
// Throttle control
bool enable_throttle_control_;
};
#endif /*FILE_SIGNAL_SOURCE_H_*/

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project : build-dir ../../../../build ;
obj file_signal_source : file_signal_source.cc ;
obj usrp1_signal_source : usrp1_signal_source.cc ;

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/*!
* \file usrp1_signal_source.cc
* \brief Brief description of the file here
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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/>.
*
* -------------------------------------------------------------------------
*/
#include "usrp1_signal_source.h"
#include <gnuradio/usrp_source_s.h>
#include <gnuradio/usrp_source_c.h>
#include <gnuradio/gr_file_sink.h>
#include "configuration_interface.h"
#include "gnss_sdr_valve.h"
#include <glog/log_severity.h>
#include <glog/logging.h>
using google::LogMessage;
Usrp1SignalSource::Usrp1SignalSource(ConfigurationInterface* configuration,
std::string role, unsigned int in_stream, unsigned int out_stream,
gr_msg_queue_sptr queue) :
role_(role), in_stream_(in_stream), out_stream_(out_stream),
queue_(queue)
{
std::string empty = "";
std::string default_dump_file = "./data/signal_source.dat";
std::string default_item_type = "short";
which_board_ = configuration->property(role + ".which_board", 0);
decim_rate_ = configuration->property(role + ".decim_rate", 16);
nchan_ = configuration->property(role + ".nchan", 1);
mux_ = configuration->property(role + ".mux", -1);
mode_ = configuration->property(role + ".mode", 0);
fusb_block_size_ = configuration->property(role + ".fusb_block_size", 0);
fusb_nblocks_ = configuration->property(role + ".fusb_nblocks", 0);
fpga_filename_ = configuration->property(role + ".fpga_filename", empty);
firmware_filename_ = configuration->property(role + ".firmware_filename",
empty);
spec_side_ = configuration->property(role + ".spec_side", 0);
spec_subdev_ = configuration->property(role + ".spec_subdev", 0);
freq_ = configuration->property(role + ".freq", (double)1.57542e9);
gain_ = configuration->property(role + ".gain", (float)40.0);
item_type_ = configuration->property(role + ".item_type",
default_item_type);
samples_ = configuration->property(role + ".samples", 0);
dump_ = configuration->property(role + ".dump", false);
dump_filename_ = configuration->property(role + ".dump_filename",
default_dump_file);
if (item_type_.compare("short") == 0)
{
item_size_ = sizeof(short);
usrp_source_ = usrp_make_source_s(which_board_, decim_rate_, nchan_,
mux_, mode_, fusb_block_size_, fusb_nblocks_, fpga_filename_,
firmware_filename_);
}
else if (item_type_.compare("gr_complex") == 0)
{
item_size_ = sizeof(gr_complex);
usrp_source_ = usrp_make_source_c(which_board_, decim_rate_, nchan_,
mux_, mode_, fusb_block_size_, fusb_nblocks_, fpga_filename_,
firmware_filename_);
}
else
{
LOG_AT_LEVEL(WARNING) << item_type_
<< " unrecognized item type. Using short.";
item_size_ = sizeof(short);
usrp_source_ = usrp_make_source_s(which_board_, decim_rate_, nchan_,
mux_, mode_, fusb_block_size_, fusb_nblocks_, fpga_filename_,
firmware_filename_);
}
DLOG(INFO) << "usrp_source(" << usrp_source_->unique_id() << ")";
if (samples_ != 0)
{
DLOG(INFO) << "Send STOP signal after " << samples_ << " samples";
valve_ = gnss_sdr_make_valve(item_size_, samples_, queue_);
DLOG(INFO) << "valve(" << valve_->unique_id() << ")";
}
if (dump_)
{
DLOG(INFO) << "Dumping output into file " << dump_filename_;
file_sink_ = gr_make_file_sink(item_size_, dump_filename_.c_str());
DLOG(INFO) << "file_sink(" << file_sink_->unique_id() << ")";
}
DLOG(INFO) << "Item size " << item_size_;
db_base_sptr subdev = usrp_source_->selected_subdev(usrp_subdev_spec(
spec_side_, spec_subdev_));
DLOG(INFO) << "Subdevice name is " << subdev->side_and_name();
DLOG(INFO) << "Subdevice frequency ranges from " << subdev->freq_min()
<< " to " << subdev->freq_max();
mux_ = usrp_source_->determine_rx_mux_value(usrp_subdev_spec(spec_side_,
spec_subdev_));
DLOG(INFO) << "Mux is " << mux_;
usrp_source_->set_mux(mux_);
if (gain_ == -1)
{
gain_ = (subdev->gain_min() + subdev->gain_max()) / 2.0;
}
DLOG(INFO) << "Gain is " << gain_;
subdev->set_gain(gain_);
usrp_tune_result r;
bool ok = usrp_source_->tune(0, subdev, freq_, &r); //DDC 0
if (!ok)
{
LOG_AT_LEVEL(FATAL) << "Could not set frequency " << freq_
<< " for USRP";
}
DLOG(INFO) << "Frequency set to " << freq_;
DLOG(INFO) << "Decimation set to " << decim_rate_;
}
Usrp1SignalSource::~Usrp1SignalSource()
{
}
void Usrp1SignalSource::connect(gr_top_block_sptr top_block)
{
if (samples_ != 0)
{
top_block->connect(usrp_source_, 0, valve_, 0);
DLOG(INFO) << "connected usrp source to valve";
if (dump_)
{
top_block->connect(valve_, 0, file_sink_, 0);
DLOG(INFO) << "connected valve to file sink";
}
}
else
{
if (dump_)
{
top_block->connect(usrp_source_, 0, file_sink_, 0);
DLOG(INFO) << "connected usrp source to file sink";
}
}
}
void Usrp1SignalSource::disconnect(gr_top_block_sptr top_block)
{
if (samples_ != 0)
{
top_block->disconnect(usrp_source_, 0, valve_, 0);
if (dump_)
{
top_block->disconnect(valve_, 0, file_sink_, 0);
}
}
else
{
if (dump_)
{
top_block->disconnect(usrp_source_, 0, file_sink_, 0);
}
}
}
gr_basic_block_sptr Usrp1SignalSource::get_left_block()
{
LOG_AT_LEVEL(WARNING) << "Trying to get signal source left block.";
return gr_basic_block_sptr();
}
gr_basic_block_sptr Usrp1SignalSource::get_right_block()
{
if (samples_ != 0)
{
return valve_;
}
else
{
return usrp_source_;
}
}

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/*!
* \file usrp1_signal_source.h
* \brief This class represents a USRP signal source
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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 USRP1_SIGNAL_SOURCE_H_
#define USRP1_SIGNAL_SOURCE_H_
#include <boost/shared_ptr.hpp>
#include <gnuradio/gr_hier_block2.h>
#include <gnuradio/gr_msg_queue.h>
#include "gnss_block_interface.h"
class ConfigurationInterface;
class usrp_source_base;
typedef boost::shared_ptr<usrp_source_base> usrp_source_base_sptr;
class Usrp1SignalSource: public GNSSBlockInterface
{
public:
Usrp1SignalSource(ConfigurationInterface* configuration,
std::string role, unsigned int in_stream,
unsigned int out_stream, gr_msg_queue_sptr queue);
virtual ~Usrp1SignalSource();
std::string role()
{
return role_;
}
std::string implementation()
{
return "Usrp1SignalSource";
}
size_t item_size()
{
return item_size_;
}
void connect(gr_top_block_sptr top_block);
void disconnect(gr_top_block_sptr top_block);
gr_basic_block_sptr get_left_block();
gr_basic_block_sptr get_right_block();
private:
std::string role_;
unsigned int in_stream_;
unsigned int out_stream_;
int which_board_;
unsigned int decim_rate_;
int nchan_;
int mux_;
int mode_;
int fusb_block_size_;
int fusb_nblocks_;
std::string fpga_filename_;
std::string firmware_filename_;
unsigned int spec_side_;
unsigned int spec_subdev_;
double freq_;
float gain_;
std::string item_type_;
size_t item_size_;
long samples_;
bool dump_;
std::string dump_filename_;
usrp_source_base_sptr usrp_source_;
gr_block_sptr valve_;
gr_block_sptr file_sink_;
gr_msg_queue_sptr queue_;
};
#endif /*USRP1_SIGNAL_SOURCE_H_*/

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build-project adapters ;
# build-project gnuradio_blocks ;

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/*!
* \file gps_navigation.cc
* \brief Brief description of the file here
* \author Javier Arribas, 2011. jarribas(at)cttc.es
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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/>.
*
* -------------------------------------------------------------------------
*/
#include "gps_l1_ca_telemetry_decoder.h"
#include "configuration_interface.h"
#include "gps_l1_ca_telemetry_decoder_cc.h"
#include <gnuradio/gr_io_signature.h>
#include <gnuradio/gr_stream_to_vector.h>
#include <gnuradio/gr_vector_to_stream.h>
#include <glog/log_severity.h>
#include <glog/logging.h>
/* The extern keyword declares a variable or function and specifies
* that it has external linkage (its name is visible from files other
* than the one in which it's defined). When modifying a variable,
* extern specifies that the variable has static duration (it is allocated
* when the program begins and deallocated when the program ends).
* The variable is defined in main.cc
*/
extern concurrent_queue<gps_navigation_message> global_gps_nav_msg_queue;
using google::LogMessage;
GpsL1CaTelemetryDecoder::GpsL1CaTelemetryDecoder(ConfigurationInterface* configuration,
std::string role,
unsigned int in_streams,
unsigned int out_streams,
gr_msg_queue_sptr queue) :
role_(role),
in_streams_(in_streams),
out_streams_(out_streams),
queue_(queue)
{
std::string default_item_type = "gr_complex";
std::string default_dump_filename = "./navigation.dat";
DLOG(INFO) << "role " << role;
DLOG(INFO) << "vector length " << vector_length_;
item_type_ = configuration->property(role + ".item_type", default_item_type);
vector_length_ = configuration->property(role + ".vector_length", 2048);
dump_ = configuration->property(role + ".dump", false);
dump_filename_ = configuration->property(role + ".dump_filename", default_dump_filename); //unused!
if(item_type_.compare("gr_complex") == 0)
{
item_size_ = sizeof(gr_complex);
telemetry_decoder_ = gps_l1_ca_make_telemetry_decoder_cc(satellite_, 0, 0, vector_length_, queue_, dump_); // TODO fix me
}
else
{
LOG_AT_LEVEL(WARNING) << item_type_ << " unknown navigation item type.";
}
DLOG(INFO) << "telemetry_decoder(" << telemetry_decoder_->unique_id() << ")";
// set the navigation msg queue;
telemetry_decoder_->set_navigation_queue(&global_gps_nav_msg_queue);
DLOG(INFO) << "global navigation message queue assigned to telemetry_decoder ("<< telemetry_decoder_->unique_id() << ")";
}
GpsL1CaTelemetryDecoder::~GpsL1CaTelemetryDecoder()
{}
void GpsL1CaTelemetryDecoder::connect(gr_top_block_sptr top_block)
{
// Nothing to connect internally
DLOG(INFO) << "nothing to connect internally";
}
void GpsL1CaTelemetryDecoder::disconnect(gr_top_block_sptr top_block)
{
// Nothing to disconnect
}
gr_basic_block_sptr GpsL1CaTelemetryDecoder::get_left_block()
{
return telemetry_decoder_;
}
gr_basic_block_sptr GpsL1CaTelemetryDecoder::get_right_block()
{
return telemetry_decoder_;
}

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/*!
* \file gps_navigation.h
* \brief Brief description of the file here
* \author Javier Arribas, 2011. jarribas(at)cttc.es
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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_TELEMETRY_DECODER_H_
#define GPS_L1_CA_TELEMETRY_DECODER_H_
#include "telemetry_decoder_interface.h"
#include "gps_l1_ca_telemetry_decoder_cc.h"
#include <gnuradio/gr_msg_queue.h>
class ConfigurationInterface;
class GpsL1CaTelemetryDecoder : public TelemetryDecoderInterface
{
public:
GpsL1CaTelemetryDecoder(ConfigurationInterface* configuration,
std::string role,
unsigned int in_streams,
unsigned int out_streams,
gr_msg_queue_sptr queue);
virtual ~GpsL1CaTelemetryDecoder();
std::string role()
{
return role_;
}
std::string implementation()
{
return "TelemetryDecoder";
}
void connect(gr_top_block_sptr top_block);
void disconnect(gr_top_block_sptr top_block);
gr_basic_block_sptr get_left_block();
gr_basic_block_sptr get_right_block();
void set_satellite(int satellite){telemetry_decoder_->set_satellite(satellite);};
void set_channel(int channel){telemetry_decoder_->set_channel(channel);};
void reset()
{
return;
};
size_t item_size()
{
return item_size_;
}
private:
gps_l1_ca_telemetry_decoder_cc_sptr telemetry_decoder_;
int satellite_;
int channel_;
size_t item_size_;
unsigned int vector_length_;
std::string item_type_;
bool dump_;
std::string dump_filename_;
std::string role_;
unsigned int in_streams_;
unsigned int out_streams_;
gr_msg_queue_sptr queue_;
};
#endif

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project : build-dir ../../../../build ;
obj gps_l1_ca_telemetry_decoder : gps_l1_ca_telemetry_decoder.cc ;

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/*!
* Navigation message demodulator based on the Kay Borre book MATLAB-based GPS receiver
*/
/**
* Copyright notice
*/
/**
* Author: Javier Arribas, 2011. jarribas(at)cttc.es
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gps_l1_ca_telemetry_decoder_cc.h"
#include "control_message_factory.h"
#include <iostream>
#include <sstream>
#include <bitset>
#include <gnuradio/gr_io_signature.h>
#include <glog/log_severity.h>
#include <glog/logging.h>
using google::LogMessage;
gps_l1_ca_telemetry_decoder_cc_sptr
gps_l1_ca_make_telemetry_decoder_cc(unsigned int satellite, long if_freq, long fs_in, unsigned
int vector_length, gr_msg_queue_sptr queue, bool dump) {
return gps_l1_ca_telemetry_decoder_cc_sptr(new gps_l1_ca_telemetry_decoder_cc(satellite, if_freq,
fs_in, vector_length, queue, dump));
}
void gps_l1_ca_telemetry_decoder_cc::forecast (int noutput_items,
gr_vector_int &ninput_items_required){
for (unsigned i = 0; i < 3; i++) {
ninput_items_required[i] =d_samples_per_bit*8; //set the required sample history
}
}
gps_l1_ca_telemetry_decoder_cc::gps_l1_ca_telemetry_decoder_cc(unsigned int satellite, long if_freq, long fs_in, unsigned
int vector_length, gr_msg_queue_sptr queue, bool dump) :
gr_block ("gps_navigation_cc", gr_make_io_signature (3, 3, sizeof(float)),
gr_make_io_signature(1, 1, sizeof(gnss_synchro))) {
// initialize internal vars
d_queue = queue;
d_dump = dump;
d_satellite = satellite;
d_vector_length = vector_length;
d_samples_per_bit=20; // it is exactly 1000*(1/50)=20
// set the preamble
unsigned short int preambles_bits[8]=GPS_PREAMBLE;
memcpy((unsigned short int*)this->d_preambles_bits, (unsigned short int*)preambles_bits, 8* sizeof(unsigned short int));
// preamble bits to sampled symbols
d_preambles_symbols=(signed int*)malloc(sizeof(signed int)*8*d_samples_per_bit);
int n=0;
for (int i=0;i<8;i++)
{
for (unsigned int j=0;j<d_samples_per_bit;j++)
{
if (d_preambles_bits[i]==1)
{
d_preambles_symbols[n]=1;
}else{
d_preambles_symbols[n]=-1;
}
n++;
}
}
d_sample_counter=0;
d_stat=0;
d_preamble_index=0;
d_symbol_accumulator_counter=0;
d_frame_bit_index=0;
d_flag_frame_sync=false;
d_GPS_frame_4bytes=0;
d_prev_GPS_frame_4bytes=0;
d_flag_parity=false;
//set_history(d_samples_per_bit*8); // At least a history of 8 bits are needed to correlate with the preamble
}
gps_l1_ca_telemetry_decoder_cc::~gps_l1_ca_telemetry_decoder_cc() {
delete d_preambles_symbols;
d_dump_file.close();
}
int gps_l1_ca_telemetry_decoder_cc::general_work (int noutput_items, gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items, gr_vector_void_star &output_items) {
int corr_value=0;
int preamble_diff;
gnss_synchro gps_synchro; //structure to save the synchronization information
gnss_synchro **out = (gnss_synchro **) &output_items[0];
d_sample_counter++; //count for the processed samples
const float **in = (const float **) &input_items[0]; //Get the input samples pointer
//std::cout<<"CH1="<<in[0][0]; // Q
//std::cout<<"CH2="<<in[1][0]; // I
//std::cout<<"CH3="<<in[2][0]; // Delay
//std::cout<<"N_input_streams="<<ninput_items.size();
// TODO Optimize me!
//******* preamble correlation ********
for (unsigned int i=0;i<d_samples_per_bit*8;i++){
if (in[1][i] <= 0) // symbols clipping
{
corr_value-=d_preambles_symbols[i];
}else{
corr_value+=d_preambles_symbols[i];
}
}
//******* frame sync ******************
if (abs(corr_value)>=153){
//TODO: Rewrite with state machine
if (d_stat==0)
{
d_GPS_FSM.Event_gps_word_preamble();
d_preamble_index=d_sample_counter;//record the preamble sample stamp
std::cout<<"Pre-detection"<<std::endl;
d_symbol_accumulator=0; //sync the symbol to bits integrator
d_symbol_accumulator_counter=0;
d_frame_bit_index=8;
d_stat=1; // enter into frame pre-detection status
}else if (d_stat==1) //check 6 seconds of preample separation
{
preamble_diff=abs(d_sample_counter-d_preamble_index);
if (abs(preamble_diff-6000)<1)
{
d_GPS_FSM.Event_gps_word_preamble();
d_preamble_index=d_sample_counter;//record the preamble sample stamp
if (!d_flag_frame_sync){
d_flag_frame_sync=true;
std::cout<<" Frame sync with phase "<<in[2][0]<<std::endl;
}
}else
{
if (preamble_diff>7000){
std::cout<<"lost of frame sync"<<std::endl;
d_stat=0; //lost of frame sync
d_flag_frame_sync=false;
}
}
}
}
//******* SYMBOL TO BIT *******
d_symbol_accumulator+=in[1][d_samples_per_bit*8-1]; // accumulate the input value in d_symbol_accumulator
d_symbol_accumulator_counter++;
if (d_symbol_accumulator_counter==20)
{
if (d_symbol_accumulator>0){ //symbol to bit
d_GPS_frame_4bytes+=1; //insert the telemetry bit in LSB
}
d_symbol_accumulator=0;
d_symbol_accumulator_counter=0;
//******* bits to words ******
d_frame_bit_index++;
if (d_frame_bit_index==30)
{
d_frame_bit_index=0;
//parity check
//Each word in wordbuff is composed of:
// Bits 0 to 29 = the GPS data word
// Bits 30 to 31 = 2 LSBs of the GPS word ahead.
// prepare the extended frame [-2 -1 0 ... 30]
if (d_prev_GPS_frame_4bytes & 0x00000001)
{
d_GPS_frame_4bytes=d_GPS_frame_4bytes|0x40000000;
}
if (d_prev_GPS_frame_4bytes & 0x00000002)
{
d_GPS_frame_4bytes=d_GPS_frame_4bytes|0x80000000;
}
/* Check that the 2 most recently logged words pass parity. Have to first
invert the data bits according to bit 30 of the previous word. */
if(d_GPS_frame_4bytes & 0x40000000)
{
d_GPS_frame_4bytes ^= 0x3FFFFFC0; // invert the data bits (using XOR)
}
if (gps_word_parityCheck(d_GPS_frame_4bytes)) {
memcpy(&d_GPS_FSM.d_GPS_frame_4bytes,&d_GPS_frame_4bytes,sizeof(char)*4);
d_GPS_FSM.Event_gps_word_valid();
d_flag_parity=true;
}else{
d_GPS_FSM.Event_gps_word_invalid();
d_flag_parity=false;
}
d_prev_GPS_frame_4bytes=d_GPS_frame_4bytes; // save the actual frame
d_GPS_frame_4bytes=d_GPS_frame_4bytes & 0;
}else{
d_GPS_frame_4bytes<<=1; //shift 1 bit left the telemetry word
}
}
// output the frame
consume_each(1); //one by one
if ((d_sample_counter%NAVIGATION_OUTPUT_RATE_MS)==0)
{
gps_synchro.valid_word=(d_flag_frame_sync==true and d_flag_parity==true);
gps_synchro.last_preamble_index=d_preamble_index;
gps_synchro.prn_delay=in[2][0];
gps_synchro.satellite_PRN=d_satellite+1;
gps_synchro.channel_ID=d_channel;
*out[0]=gps_synchro;
return 1;
}else{
return 0;
}
}
void gps_l1_ca_telemetry_decoder_cc::set_satellite(int satellite) {
d_satellite = satellite;
d_GPS_FSM.d_satellite_PRN=satellite;
LOG_AT_LEVEL(INFO) << "Navigation Satellite set to " << d_satellite;
}
void gps_l1_ca_telemetry_decoder_cc::set_channel(int channel) {
d_channel = channel;
d_GPS_FSM.d_channel_ID=channel;
LOG_AT_LEVEL(INFO) << "Navigation channel set to " << channel;
}

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/**
* Copyright notice
*/
/**
* Author: Javier Arribas, 2011. jarribas(at)cttc.es
*/
#ifndef GPS_L1_CA_TELEMETRY_DECODER_CC_H
#define GPS_L1_CA_TELEMETRY_DECODER_CC_H
#include <fstream>
#include <gnuradio/gr_block.h>
//#include <gnuradio/gr_sync_block.h>
#include <gnuradio/gr_msg_queue.h>
#include <bitset>
#include "GPS_L1_CA.h"
#include "gps_telemetry.h"
#include "gps_l1_ca_subframe_fsm.h"
#include "concurrent_queue.h"
class gps_l1_ca_telemetry_decoder_cc;
typedef boost::shared_ptr<gps_l1_ca_telemetry_decoder_cc> gps_l1_ca_telemetry_decoder_cc_sptr;
gps_l1_ca_telemetry_decoder_cc_sptr
gps_l1_ca_make_telemetry_decoder_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_telemetry_decoder_cc : public gr_block {
private:
friend gps_l1_ca_telemetry_decoder_cc_sptr
gps_l1_ca_make_telemetry_decoder_cc(unsigned int satellite, long if_freq, long fs_in,unsigned
int vector_length, gr_msg_queue_sptr queue, bool dump);
gps_l1_ca_telemetry_decoder_cc(unsigned int satellite, long if_freq, long fs_in,unsigned
int vector_length, gr_msg_queue_sptr queue, bool dump);
// constants
unsigned short int d_preambles_bits[8];
// class private vars
signed int *d_preambles_symbols;
unsigned int d_samples_per_bit;
long unsigned int d_sample_counter;
long unsigned int d_preamble_index;
unsigned int d_stat;
bool d_flag_frame_sync;
// symbols
int d_symbol_accumulator;
short int d_symbol_accumulator_counter;
//bits and frame
unsigned short int d_frame_bit_index;
unsigned int d_GPS_frame_4bytes;
unsigned int d_prev_GPS_frame_4bytes;
bool d_flag_parity;
int d_word_number;
// navigation message vars
gps_navigation_message d_nav;
GpsL1CaSubframeFsm d_GPS_FSM;
gr_msg_queue_sptr d_queue;
unsigned int d_vector_length;
bool d_dump;
int d_satellite;
int d_channel;
std::string d_dump_filename;
std::ofstream d_dump_file;
public:
~gps_l1_ca_telemetry_decoder_cc();
void set_satellite(int satellite);
void set_channel(int channel);
void set_navigation_queue(concurrent_queue<gps_navigation_message> *nav_queue){d_GPS_FSM.d_nav_queue=nav_queue;}
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

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project : build-dir ../../../../build ;
obj gps_l1_ca_telemetry_decoder_cc : gps_l1_ca_telemetry_decoder_cc.cc ;

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build-project adapters ;
build-project gnuradio_blocks ;
build-project libs ;

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#include "gps_l1_ca_subframe_fsm.h"
//************ GPS WORD TO SUBFRAME DECODER STATE MACHINE **********
struct Ev_gps_word_valid : sc::event<Ev_gps_word_valid> {};
struct Ev_gps_word_invalid : sc::event<Ev_gps_word_invalid>{};
struct Ev_gps_word_preamble : sc::event<Ev_gps_word_preamble>{};
struct gps_subframe_fsm_S0: public sc::state<gps_subframe_fsm_S0, GpsL1CaSubframeFsm > {
public:
// sc::transition(evento,estado_destino)
typedef sc::transition< Ev_gps_word_preamble, gps_subframe_fsm_S1 > reactions;
gps_subframe_fsm_S0(my_context ctx): my_base( ctx ){
std::cout<<"Enter S0 "<<std::endl;
}
};
struct gps_subframe_fsm_S1: public sc::state<gps_subframe_fsm_S1, GpsL1CaSubframeFsm > {
public:
typedef mpl::list<sc::transition< Ev_gps_word_invalid, gps_subframe_fsm_S0 >,
sc::transition< Ev_gps_word_valid, gps_subframe_fsm_S2 > > reactions;
gps_subframe_fsm_S1(my_context ctx): my_base( ctx ){
std::cout<<"Enter S1 "<<std::endl;
}
};
struct gps_subframe_fsm_S2: public sc::state<gps_subframe_fsm_S2, GpsL1CaSubframeFsm > {
public:
typedef mpl::list<sc::transition< Ev_gps_word_invalid, gps_subframe_fsm_S0 >,
sc::transition< Ev_gps_word_valid, gps_subframe_fsm_S3 > > reactions;
gps_subframe_fsm_S2(my_context ctx): my_base( ctx ){
std::cout<<"Enter S2 "<<std::endl;
context< GpsL1CaSubframeFsm >().gps_word_to_subframe(0);
}
};
struct gps_subframe_fsm_S3: public sc::state<gps_subframe_fsm_S3, GpsL1CaSubframeFsm > {
public:
typedef mpl::list<sc::transition< Ev_gps_word_invalid, gps_subframe_fsm_S0 >,
sc::transition< Ev_gps_word_valid, gps_subframe_fsm_S4 > > reactions;
gps_subframe_fsm_S3(my_context ctx): my_base( ctx ){
std::cout<<"Enter S3 "<<std::endl;
context< GpsL1CaSubframeFsm >().gps_word_to_subframe(1);
}
};
struct gps_subframe_fsm_S4: public sc::state<gps_subframe_fsm_S4, GpsL1CaSubframeFsm > {
public:
typedef mpl::list<sc::transition< Ev_gps_word_invalid, gps_subframe_fsm_S0 >,
sc::transition< Ev_gps_word_valid, gps_subframe_fsm_S5 > > reactions;
gps_subframe_fsm_S4(my_context ctx): my_base( ctx ){
std::cout<<"Enter S4 "<<std::endl;
context< GpsL1CaSubframeFsm >().gps_word_to_subframe(2);
}
};
struct gps_subframe_fsm_S5: public sc::state<gps_subframe_fsm_S5, GpsL1CaSubframeFsm > {
public:
typedef mpl::list<sc::transition< Ev_gps_word_invalid, gps_subframe_fsm_S0 >,
sc::transition< Ev_gps_word_valid, gps_subframe_fsm_S6 > > reactions;
gps_subframe_fsm_S5(my_context ctx): my_base( ctx ){
std::cout<<"Enter S5 "<<std::endl;
context< GpsL1CaSubframeFsm >().gps_word_to_subframe(3);
}
};
struct gps_subframe_fsm_S6: public sc::state<gps_subframe_fsm_S6, GpsL1CaSubframeFsm > {
public:
typedef mpl::list<sc::transition< Ev_gps_word_invalid, gps_subframe_fsm_S0 >,
sc::transition< Ev_gps_word_valid, gps_subframe_fsm_S7 > > reactions;
gps_subframe_fsm_S6(my_context ctx): my_base( ctx ){
std::cout<<"Enter S6 "<<std::endl;
context< GpsL1CaSubframeFsm >().gps_word_to_subframe(4);
}
};
struct gps_subframe_fsm_S7: public sc::state<gps_subframe_fsm_S7, GpsL1CaSubframeFsm > {
public:
typedef mpl::list<sc::transition< Ev_gps_word_invalid, gps_subframe_fsm_S0 >,
sc::transition< Ev_gps_word_valid, gps_subframe_fsm_S8 > > reactions;
gps_subframe_fsm_S7(my_context ctx): my_base( ctx ){
std::cout<<"Enter S7 "<<std::endl;
context< GpsL1CaSubframeFsm >().gps_word_to_subframe(5);
}
};
struct gps_subframe_fsm_S8: public sc::state<gps_subframe_fsm_S8, GpsL1CaSubframeFsm > {
public:
typedef mpl::list<sc::transition< Ev_gps_word_invalid, gps_subframe_fsm_S0 >,
sc::transition< Ev_gps_word_valid, gps_subframe_fsm_S9 > > reactions;
gps_subframe_fsm_S8(my_context ctx): my_base( ctx ){
std::cout<<"Enter S8 "<<std::endl;
context< GpsL1CaSubframeFsm >().gps_word_to_subframe(6);
}
};
struct gps_subframe_fsm_S9: public sc::state<gps_subframe_fsm_S9, GpsL1CaSubframeFsm > {
public:
typedef mpl::list<sc::transition< Ev_gps_word_invalid, gps_subframe_fsm_S0 >,
sc::transition< Ev_gps_word_valid, gps_subframe_fsm_S10 > > reactions;
gps_subframe_fsm_S9(my_context ctx): my_base( ctx ){
std::cout<<"Enter S9 "<<std::endl;
context< GpsL1CaSubframeFsm >().gps_word_to_subframe(7);
}
};
struct gps_subframe_fsm_S10: public sc::state<gps_subframe_fsm_S10, GpsL1CaSubframeFsm > {
public:
typedef mpl::list<sc::transition< Ev_gps_word_invalid, gps_subframe_fsm_S0 >,
sc::transition< Ev_gps_word_valid, gps_subframe_fsm_S11 > > reactions;
gps_subframe_fsm_S10(my_context ctx): my_base( ctx ){
std::cout<<"Enter S10 "<<std::endl;
context< GpsL1CaSubframeFsm >().gps_word_to_subframe(8);
}
};
struct gps_subframe_fsm_S11: public sc::state<gps_subframe_fsm_S11, GpsL1CaSubframeFsm > {
public:
typedef sc::transition< Ev_gps_word_preamble, gps_subframe_fsm_S1 > reactions;
gps_subframe_fsm_S11(my_context ctx): my_base( ctx ){
std::cout<<"Completed GPS Subframe!"<<std::endl;
context< GpsL1CaSubframeFsm >().gps_word_to_subframe(9);
context< GpsL1CaSubframeFsm >().gps_subframe_to_nav_msg(); //decode the subframe
// DECODE SUBFRAME
std::cout<<"Enter S11"<<std::endl;
}
};
GpsL1CaSubframeFsm::GpsL1CaSubframeFsm()
{
d_nav.reset();
initiate(); //start the FSM
}
void GpsL1CaSubframeFsm::gps_word_to_subframe(int position)
{
// insert the word in the correct position of the subframe
std::memcpy(&d_subframe[position*GPS_WORD_LENGTH],&d_GPS_frame_4bytes,sizeof(char)*GPS_WORD_LENGTH);
}
void GpsL1CaSubframeFsm::gps_subframe_to_nav_msg()
{
int subframe_ID;
// NEW GPS SUBFRAME HAS ARRIVED!
subframe_ID=d_nav.subframe_decoder(this->d_subframe); //decode the subframe
d_nav.d_satellite_PRN=d_satellite_PRN+1;
d_nav.d_channel_ID=d_channel_ID;
//TODO: change to subframe 5
if (subframe_ID==3) { // if the subframe is the 5th, then
if (d_nav.satellite_validation()) // if all the satellite ephemeris parameters are good, then
{
// compute the GPS master clock
d_nav.master_clock();
// compute the satellite current ECEF position
d_nav.satpos();
// compute the clock error including relativistic effects
d_nav.relativistic_clock_correction();
// Send the procesed satellite ephemeris packet
d_nav_queue->push(d_nav);
}
}
}
void GpsL1CaSubframeFsm::Event_gps_word_valid()
{
this->process_event(Ev_gps_word_valid());
}
void GpsL1CaSubframeFsm::Event_gps_word_invalid()
{
this->process_event(Ev_gps_word_invalid());
}
void GpsL1CaSubframeFsm::Event_gps_word_preamble()
{
this->process_event(Ev_gps_word_preamble());
}

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/**
* Copyright notice
*/
/**
* Author: Javier Arribas, 2011. jarribas(at)cttc.es
*/
//************ GPS WORD TO SUBFRAME DECODER STATE MACHINE **********
#ifndef GPS_L1_CA_SUBFRAME_FSM_H
#define GPS_L1_CA_SUBFRAME_FSM_H
#include <boost/statechart/state_machine.hpp>
#include <boost/statechart/simple_state.hpp>
#include <boost/statechart/state.hpp>
#include <boost/statechart/transition.hpp>
#include <boost/statechart/custom_reaction.hpp>
#include <boost/mpl/list.hpp>
#include <queue>
#include <boost/thread/mutex.hpp>
#include <boost/thread/thread.hpp>
#include "concurrent_queue.h"
#include <iostream>
#include <cstring>
#include "GPS_L1_CA.h"
#include "gps_telemetry.h"
#include "gps_navigation_message.h"
namespace sc = boost::statechart;
namespace mpl = boost::mpl;
struct gps_subframe_fsm_S0;
struct gps_subframe_fsm_S1;
struct gps_subframe_fsm_S2;
struct gps_subframe_fsm_S3;
struct gps_subframe_fsm_S4;
struct gps_subframe_fsm_S5;
struct gps_subframe_fsm_S6;
struct gps_subframe_fsm_S7;
struct gps_subframe_fsm_S8;
struct gps_subframe_fsm_S9;
struct gps_subframe_fsm_S10;
struct gps_subframe_fsm_S11;
class GpsL1CaSubframeFsm : public sc::state_machine< GpsL1CaSubframeFsm, gps_subframe_fsm_S0 >{
private:
public:
// channel and satellite info
int d_channel_ID;
int d_satellite_PRN;
// ephemeris queue
concurrent_queue<gps_navigation_message> *d_nav_queue;
// navigation message class
gps_navigation_message d_nav;
char d_subframe[GPS_SUBFRAME_LENGTH];
char d_GPS_frame_4bytes[GPS_WORD_LENGTH];
void gps_word_to_subframe(int position);
void gps_subframe_to_nav_msg();
//FSM EVENTS
void Event_gps_word_valid();
void Event_gps_word_invalid();
void Event_gps_word_preamble();
GpsL1CaSubframeFsm();
};
#endif

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project : build-dir ../../../../build ;
obj gps_l1_ca_subframe_fsm : gps_l1_ca_subframe_fsm.cc ;

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/*!
* \file gnss_tracking_a.cc
* \brief Brief description of the file here
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
* Javier Arribas, 2011. jarribas(at)cttc.es
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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/>.
*
* -------------------------------------------------------------------------
*/
#include "gps_l1_ca_dll_pll_tracking.h"
#include "configuration_interface.h"
#include <gnuradio/gr_io_signature.h>
#include <glog/log_severity.h>
#include <glog/logging.h>
using google::LogMessage;
GpsL1CaDllPllTracking::GpsL1CaDllPllTracking(
ConfigurationInterface* configuration, std::string role,
unsigned int in_streams, unsigned int out_streams,
gr_msg_queue_sptr queue) :
role_(role), in_streams_(in_streams), out_streams_(out_streams), queue_(
queue)
{
std::string default_item_type = "gr_complex";
std::string default_dump_filename = "./tracking.dat";
DLOG(INFO) << "role " << role;
DLOG(INFO) << "vector length " << vector_length_;
item_type_ = configuration->property(role + ".item_type",
default_item_type);
vector_length_ = configuration->property(role + ".vector_length", 2048);
fs_in_ = configuration->property(role + ".fs_in", 2048000);
if_ = configuration->property(role + ".if", 0);
dump_ = configuration->property(role + ".dump", false);
dump_filename_ = configuration->property(role + ".dump_filename",
default_dump_filename); //unused!
if (item_type_.compare("gr_complex") == 0)
{
item_size_ = sizeof(gr_complex);
tracking_ = gps_l1_ca_dll_pll_make_tracking_cc(satellite_, if_,
fs_in_, vector_length_, queue_, dump_);
}
else
{
LOG_AT_LEVEL(WARNING) << item_type_ << " unknown tracking item type.";
}
DLOG(INFO) << "tracking(" << tracking_->unique_id() << ")";
}
GpsL1CaDllPllTracking::~GpsL1CaDllPllTracking()
{
}
void GpsL1CaDllPllTracking::start_tracking()
{
tracking_->start_tracking();
}
void GpsL1CaDllPllTracking::set_satellite(unsigned int satellite)
{
satellite_ = satellite;
tracking_->set_satellite(satellite);
DLOG(INFO) << "satellite set to " << satellite_;
}
void GpsL1CaDllPllTracking::set_channel(unsigned int channel)
{
channel_ = channel;
tracking_->set_channel(channel);
}
void GpsL1CaDllPllTracking::set_channel_queue(
concurrent_queue<int> *channel_internal_queue)
{
channel_internal_queue_ = channel_internal_queue;
tracking_->set_channel_queue(channel_internal_queue_);
}
void GpsL1CaDllPllTracking::set_prn_code_phase(signed int phase)
{
return tracking_->set_acq_code_phase((double)phase);
}
void GpsL1CaDllPllTracking::set_doppler_freq_shift(float phase)
{
return tracking_->set_acq_doppler(phase);
}
void GpsL1CaDllPllTracking::set_acq_sample_stamp(
unsigned long int sample_stamp)
{
return tracking_->set_acq_sample_stamp(sample_stamp);
}
void GpsL1CaDllPllTracking::connect(gr_top_block_sptr top_block)
{
//nothing to connect, now the tracking uses gr_sync_decimator
}
void GpsL1CaDllPllTracking::disconnect(gr_top_block_sptr top_block)
{
//nothing to disconnect, now the tracking uses gr_sync_decimator
}
gr_basic_block_sptr GpsL1CaDllPllTracking::get_left_block()
{
return tracking_;
}
gr_basic_block_sptr GpsL1CaDllPllTracking::get_right_block()
{
return tracking_;
}

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/*!
* \file gnss_correlator_a.h
* \brief Brief description of the file here
* \author Javier Arribas, 2011. jarribas(at)cttc.es
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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_H_
#define GPS_L1_CA_DLL_PLL_TRACKING_H_
#include "tracking_interface.h"
#include "gps_l1_ca_dll_pll_tracking_cc.h"
#include <gnuradio/gr_msg_queue.h>
class ConfigurationInterface;
class GpsL1CaDllPllTracking : public TrackingInterface
{
public:
GpsL1CaDllPllTracking(ConfigurationInterface* configuration,
std::string role,
unsigned int in_streams,
unsigned int out_streams,
gr_msg_queue_sptr queue);
virtual ~GpsL1CaDllPllTracking();
std::string role()
{
return role_;
}
std::string implementation()
{
return "tracking";
}
size_t item_size()
{
return item_size_;
}
void connect(gr_top_block_sptr top_block);
void disconnect(gr_top_block_sptr top_block);
gr_basic_block_sptr get_left_block();
gr_basic_block_sptr get_right_block();
void set_satellite(unsigned int satellite);
void set_channel(unsigned int channel);
void set_prn_code_phase(signed int phase);
void set_doppler_freq_shift(float phase);
void set_channel_queue(concurrent_queue<int> *channel_internal_queue);
void start_tracking();
void set_acq_sample_stamp(unsigned long int sample_stamp);
private:
gps_l1_ca_dll_pll_tracking_cc_sptr tracking_;
size_t item_size_;
std::string item_type_;
unsigned int vector_length_;
unsigned int satellite_;
unsigned int channel_;
long fs_in_;
long if_;
bool dump_;
std::string dump_filename_;
std::string role_;
unsigned int in_streams_;
unsigned int out_streams_;
gr_msg_queue_sptr queue_;
concurrent_queue<int> *channel_internal_queue_;
};
#endif // GPS_L1_CA_DLL_PLL_TRACKING_H_

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project : build-dir ../../../../build ;
obj gps_l1_ca_dll_pll_tracking : gps_l1_ca_dll_pll_tracking.cc ;

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//! Single-delta GPS L1 CA DLL+PLL tracking
/*!
* Tracking based on the Kay Borre book MATLAB-based GPS receiver
*/
/**
* Copyright notice
*/
/**
* Author: Javier Arribas, 2011. jarribas(at)cttc.es
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gps_l1_ca_dll_pll_tracking_cc.h"
#include "gps_sdr_signal_processing.h"
//#include "gps_sdr_signaldef.h"
#include "gps_sdr_simd.h"
#include "gps_sdr_x86.h"
#include "control_message_factory.h"
#include <iostream>
#include <sstream>
#include <cmath>
#include "math.h"
#include <gnuradio/gr_io_signature.h>
#include <glog/log_severity.h>
#include <glog/logging.h>
using google::LogMessage;
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) {
return gps_l1_ca_dll_pll_tracking_cc_sptr(new gps_l1_ca_dll_pll_tracking_cc(satellite, if_freq,
fs_in, vector_length, queue, dump));
}
gps_l1_ca_dll_pll_tracking_cc::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) :
gr_sync_decimator ("gps_l1_ca_dll_pll_tracking_cc", gr_make_io_signature (1, 1, sizeof(gr_complex)),
gr_make_io_signature(3, 3, sizeof(float)),vector_length) {
// initialize internal vars
d_queue = queue;
d_dump = dump;
d_satellite = satellite;
d_if_freq = if_freq;
d_fs_in = fs_in;
d_vector_length = vector_length;
// Initialize tracking variables ==========================================
//TODO: Include this setting in configuration file
//--- DLL variables --------------------------------------------------------
d_early_late_spc = 0.5; // Define early-late offset (in chips)
d_pdi_code = 0.001;// Summation interval for code
d_dllnoisebandwidth=2.0; //Hz
d_dlldampingratio=0.7;
calculate_lopp_coef(&d_tau1_code, &d_tau2_code, d_dllnoisebandwidth, d_dlldampingratio,1.0);// Calculate filter coefficient values
//--- PLL variables --------------------------------------------------------
d_pdi_carr = 0.001;// Summation interval for carrier
d_plldampingratio=0.7;
d_pllnoisebandwidth=25;
//Calculate filter coefficient values
calculate_lopp_coef(&d_tau1_carr, &d_tau2_carr, d_pllnoisebandwidth, d_plldampingratio,0.25);// Calculate filter coefficient values
// Initialization of local code replica
// Get a vector with the C/A code sampled 1x/chip
d_code_length=1023;
d_ca_code=(gr_complex*)malloc(sizeof(gr_complex)*(d_code_length+2));
// Get space for the resampled early / prompt / late local replicas
d_early_code=(gr_complex*)malloc(sizeof(gr_complex)*d_vector_length);
// Get space for the resampled early / prompt / late local replicas
d_prompt_code=(gr_complex*)malloc(sizeof(gr_complex)*d_vector_length);
// Get space for the resampled early / prompt / late local replicas
d_late_code=(gr_complex*)malloc(sizeof(gr_complex)*d_vector_length);
d_carr_sign=(gr_complex*)malloc(sizeof(gr_complex)*d_vector_length);
d_bb_sign=(gr_complex*)malloc(sizeof(gr_complex)*d_vector_length);
//--- Perform initializations ------------------------------
// define initial code frequency basis of NCO
d_code_freq = 1023000; //Hz
// define residual code phase (in chips)
d_rem_code_phase = 0.0;
// define carrier frequency which is used over whole tracking period
// it must be set with set_acq_code_phase() and set_acq_doppler()
// define residual carrier phase
d_rem_carr_phase = 0.0;
// code tracking loop parameters
d_old_code_nco = 0.0;
d_old_code_error = 0.0;
// carrier/Costas loop parameters
d_old_carr_nco = 0.0;
d_old_carr_error = 0.0;
d_absolute_code_phase_chips = 0;
// sample synchronization
d_sample_counter=0;
d_acq_sample_stamp=0;
d_dump_filename="./data/trk_epr.dat";
d_enable_tracking=false;
d_last_seg=0;
}
void gps_l1_ca_dll_pll_tracking_cc::calculate_lopp_coef(float* tau1,float* tau2, float lbw, float zeta, float k){
// Solve natural frequency
float Wn;
Wn = lbw*8*zeta / (4*zeta*zeta + 1);
// solve for t1 & t2
*tau1 = k / (Wn * Wn);
*tau2 = (2.0 * zeta) / Wn;
//std::cout<<"Tau1= "<<*tau1<<std::endl;
//std::cout<<"Tau2= "<<*tau2<<std::endl;
}
void gps_l1_ca_dll_pll_tracking_cc::update_local_code_refs()
{
float tcode;
float max_tcode;
unsigned int i=0;
int tmp_index;
float block_correction;
// std::cout<<"d_code_phase_step"<<d_code_phase_step<<std::endl;
// std::cout<<"d_rem_code_phase"<<d_rem_code_phase<<std::endl;
// std::cout<<"d_blk_size"<<d_blk_size<<std::endl;
// Define index into early code vector
max_tcode=((float)d_blk_size-1.0)*d_code_phase_step+d_rem_code_phase-d_early_late_spc;
for (tcode=d_rem_code_phase-d_early_late_spc;tcode<max_tcode;tcode+=d_code_phase_step)
{
tmp_index=ceil(fmod(tcode,d_code_length));
d_early_code[i]=d_ca_code[tmp_index];
i++;
// if (i==d_vector_length){
// std::cout<<"Break "<<std::endl;
// break;
// }
}
// Define index into late code vector
i=0;
max_tcode=((float)d_blk_size-1.0)*d_code_phase_step+d_rem_code_phase+d_early_late_spc;
for (tcode=d_rem_code_phase+d_early_late_spc;tcode<max_tcode;tcode+=d_code_phase_step)
{
tmp_index=ceil(fmod(tcode,d_code_length));
d_late_code[i]=d_ca_code[tmp_index];
i++;
}
// Define index into prompt code vector
i=0;
max_tcode=((float)d_blk_size-1.0)*d_code_phase_step+d_rem_code_phase;
for (tcode=d_rem_code_phase;tcode<max_tcode;tcode+=d_code_phase_step)
{
tmp_index=ceil(fmod(tcode,d_code_length));
d_prompt_code[i]=d_ca_code[tmp_index];
i++;
}
block_correction=(float)d_blk_size*(1/(float)d_fs_in)-(float)d_code_length*(1/d_code_freq);
d_rem_code_phase = (max_tcode + d_code_phase_step - block_correction) - 1023.0;
//std::cout<<"d_rem_code_phase="<<d_rem_code_phase<<std::endl;
}
void gps_l1_ca_dll_pll_tracking_cc::update_local_carrier()
{
float phase, phase_step;
phase_step = (float)TWO_PI*d_carrier_doppler/d_fs_in;
phase=d_rem_carr_phase;
for(unsigned int i = 0; i < d_vector_length; i++) {
d_carr_sign[i] = std::complex<float>(cos(phase),sin(phase));
phase += phase_step;
}
d_rem_carr_phase=fmod(phase,TWO_PI);
}
gps_l1_ca_dll_pll_tracking_cc::~gps_l1_ca_dll_pll_tracking_cc() {
d_dump_file.close();
}
void gps_l1_ca_dll_pll_tracking_cc::start_tracking(){
unsigned long int acq_sample_difference;
int trk_corrected_code_phase;
acq_sample_difference=this->d_sample_counter-d_acq_sample_stamp-d_vector_length;
float velocity_ratio,code_freq_mod,T_prn,T_prn_mod,T_chip_mod;
const float carrier_freq=1575420000;
velocity_ratio=(carrier_freq+d_carrier_doppler)/carrier_freq;
code_freq_mod=velocity_ratio*d_code_freq;
T_prn=(1/d_code_freq)*(float)d_code_length;
T_chip_mod=1/code_freq_mod;
T_prn_mod=T_chip_mod*(float)d_code_length;
trk_corrected_code_phase=round(fmod((d_code_phase+(float)acq_sample_difference+(T_prn-T_prn_mod)*((float)acq_sample_difference/(float)d_vector_length)*(float)d_fs_in),(float)d_vector_length));
if (trk_corrected_code_phase<0)
{
trk_corrected_code_phase=d_vector_length+trk_corrected_code_phase;
}
d_absolute_code_phase_chips=(float)trk_corrected_code_phase;
/*
std::cout<<"Acq sample stamp"<<d_acq_sample_stamp<<std::endl;
std::cout<<"Acq - Trk sample difference "<<acq_sample_difference<<std::endl;
std::cout<<"Trk local code correction "<<trk_corrected_code_phase<<std::endl;
std::cout<<"Rounded"<<round((float)d_code_length*(float)trk_corrected_code_phase/(float)d_vector_length);
*/
// generate local reference with the acquisition shift corrected
code_gen_conplex(&d_ca_code[1],d_satellite,1023-round((float)d_code_length*(float)trk_corrected_code_phase/(float)d_vector_length));
// Then make it possible to do early and late versions
d_ca_code[0]=d_ca_code[1023];
d_ca_code[1024]=d_ca_code[1];
DLOG(INFO) << "Start tracking for satellite "<<this->d_satellite<<" received ";
d_dump_file.open(d_dump_filename.c_str(), std::ios::out | std::ios::binary);
d_enable_tracking=true;
std::cout<<"Tracking start on channel "<<d_channel<<" for satellite ID "<< this->d_satellite << std::endl;
}
/*! Tracking signal processing
* Notice that this is a class derived from gr_sync_decimator, so each of the ninput_items has vector_length samples
*/
int gps_l1_ca_dll_pll_tracking_cc::work (int noutput_items,gr_vector_const_void_star &input_items, gr_vector_void_star &output_items) {
d_sample_counter+=d_vector_length; //count for the processed samples
if (d_enable_tracking==true){
float carr_error;
float carr_nco;
float code_error;
float code_nco;
float tmp_E,tmp_P,tmp_L;
const gr_complex* in = (gr_complex*) input_items[0];
float **out = (float **) &output_items[0];
// Find the size of a "block" or code period in whole samples
// Update the phasestep based on code freq (variable) and
// sampling frequency (fixed)
d_code_phase_step = d_code_freq / d_fs_in;
// original variable block size (MATLAB)
//d_blk_size = ceil(((float)d_code_length-d_rem_code_phase) / d_code_phase_step);
// fixed block size (Javi)
d_blk_size = ceil((float)d_code_length*(1/1023000.0)*(float)d_fs_in);
this->update_local_code_refs();
this->update_local_carrier();
d_E_I=0.0;
d_P_I=0.0;
d_L_I=0.0;
d_E_Q=0.0;
d_P_Q=0.0;
d_L_Q=0.0;
for(unsigned int i=0;i<d_vector_length;i++) {
//Perform the carrier wipe-off
d_bb_sign[i] = in[i] * d_carr_sign[i];
// Now get early, late, and prompt values for each
d_E_Q += d_early_code[i].real()*d_bb_sign[i].real();
d_E_I += d_early_code[i].real()*d_bb_sign[i].imag();
d_P_Q += d_prompt_code[i].real()*d_bb_sign[i].real();
d_P_I += d_prompt_code[i].real()*d_bb_sign[i].imag();
d_L_Q += d_late_code[i].real()*d_bb_sign[i].real();
d_L_I += d_late_code[i].real()*d_bb_sign[i].imag();
}
// Find PLL error and update carrier NCO -
// Implement carrier loop discriminator (phase detector)
//carr_error = atan(d_P.imag() / d_P.real()) / TWO_PI;
carr_error = atan(d_P_Q / d_P_I) / TWO_PI;
// Implement carrier loop filter and generate NCO command
carr_nco = d_old_carr_nco+(d_tau2_carr/d_tau1_carr)*(carr_error - d_old_carr_error) + carr_error * (d_pdi_carr/d_tau1_carr);
d_old_carr_nco = carr_nco;
d_old_carr_error = carr_error;
// Modify carrier freq based on NCO command
d_carrier_doppler = d_carr_freq_basis + carr_nco;
// Find DLL error and update code NCO -
//code_error = (abs(d_E)-abs(d_L))/(abs(d_E)+abs(d_L));
code_error = (sqrt(d_E_I*d_E_I+d_E_Q*d_E_Q)-sqrt(d_L_I*d_L_I+d_L_Q*d_L_Q))/(sqrt(d_E_I*d_E_I+d_E_Q*d_E_Q)+sqrt(d_L_I*d_L_I+d_L_Q*d_L_Q));
// Implement code loop filter and generate NCO command
code_nco = d_old_code_nco + (d_tau2_code/d_tau1_code)*(code_error - d_old_code_error) + code_error * (d_pdi_code/d_tau1_code);
d_old_code_nco = code_nco;
d_old_code_error = code_error;
d_absolute_code_phase_chips+=d_old_code_error; //accumulate the error to get the pseudorange
// Modify code freq based on NCO command
d_code_freq = 1023000 - code_nco;
// Output the tracking data to navigation and PVT
// Output channel 1: Prompt correlator output Q
*out[0]=d_P_Q;
// Output channel 2: Prompt correlator output I
*out[1]=d_P_I;
// Output channel 3: Prompt correlator output
*out[2]=d_absolute_code_phase_chips;
//Equivalent to the "absolute spreading code starting position" information of the matlab tracking algorithm
// std::cout<<"tmp_E= "<<tmp_E<<std::endl;
// std::cout<<"tmp_P= "<<tmp_P<<std::endl;
// std::cout<<"tmp_L= "<<tmp_L<<std::endl;
//
// std::cout<<"trk pllDiscr carr_error= "<<carr_error<<std::endl;
// std::cout<<"trk dllDiscr code error= "<<code_error<<std::endl;
// std::cout<<"trk dllDiscrFilt code_nco= "<<code_nco<<std::endl;
// std::cout<<"trk pllDiscrFilt carr_nco= "<<carr_nco<<std::endl;
if(d_dump) {
// MULTIPLEXED FILE RECORDING - Record results to file
tmp_E=sqrt(d_E_I*d_E_I+d_E_Q*d_E_Q);
tmp_P=sqrt(d_P_I*d_P_I+d_P_Q*d_P_Q);
tmp_L=sqrt(d_L_I*d_L_I+d_L_Q*d_L_Q);
// EPR
d_dump_file.write((char*)&tmp_E, sizeof(float));
d_dump_file.write((char*)&tmp_P, sizeof(float));
d_dump_file.write((char*)&tmp_L, sizeof(float));
// DLL
d_dump_file.write((char*)&code_error, sizeof(float));
d_dump_file.write((char*)&code_nco, sizeof(float));
//PLL
d_dump_file.write((char*)&carr_error, sizeof(float));
d_dump_file.write((char*)&carr_nco, sizeof(float));
//FREQ AND PHASE
d_dump_file.write((char*)&d_code_freq, sizeof(float));
d_dump_file.write((char*)&d_carrier_doppler, sizeof(float));
// PROMPT I and Q (to analyze navigation symbols)
d_dump_file.write((char*)&d_P_I, sizeof(float));
d_dump_file.write((char*)&d_P_Q, sizeof(float));
}
// debug: Second counter in channel 0
if (d_channel==0)
{
if (floor(d_sample_counter/d_fs_in)!=d_last_seg)
{
d_last_seg=floor(d_sample_counter/d_fs_in);
std::cout<<"t="<<d_last_seg<<std::endl;
}
}
if (d_sample_counter>round((float)this->d_fs_in*39)){ //stop after some seconds debug only!
d_enable_tracking=false;
std::cout<<"Stop tracking at sample "<<d_sample_counter<<" and acq at sample "<<d_acq_sample_stamp<<std::endl;
if(d_queue != gr_msg_queue_sptr()) {
ControlMessageFactory* cmf = new ControlMessageFactory();
d_queue->handle(cmf->GetQueueMessage(200,0)); //send stop to the control_thread
delete cmf;
std::cout<<"stop sent from tracking" << std::endl;
}
}
}
//consume_each(1); //not necesary for gr_sync_block derivates
return 1; //one group of d_vector_lenght samples at time, and output one set of results ALWAYS even in the case of d_enable_tracking==false
}
void gps_l1_ca_dll_pll_tracking_cc::set_acq_code_phase(float code_phase) {
d_code_phase = code_phase;
LOG_AT_LEVEL(INFO) << "Tracking code phase set to " << d_code_phase;
}
void gps_l1_ca_dll_pll_tracking_cc::set_acq_doppler(float doppler) {
d_carrier_doppler = doppler;
d_carr_freq_basis = doppler;
LOG_AT_LEVEL(INFO) << "Tracking carrier doppler set to " << d_carrier_doppler;
}
void gps_l1_ca_dll_pll_tracking_cc::set_satellite(unsigned int satellite) {
d_satellite = satellite;
LOG_AT_LEVEL(INFO) << "Tracking Satellite set to " << d_satellite;
}
void gps_l1_ca_dll_pll_tracking_cc::set_channel(unsigned int channel) {
d_channel = channel;
LOG_AT_LEVEL(INFO) << "Tracking Channel set to " << d_channel;
}

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/*!
* \file gps_l1_ca_dll_pll_tracking_cc.h
* \brief Brief description of the file here
* \author Javier Arribas, 2011. jarribas(at)cttc.es
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* 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
{
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_chips;
unsigned long int d_sample_counter;
unsigned long int d_acq_sample_stamp;
bool d_enable_tracking;
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);
};
#endif //GPS_L1_CA_DLL_PLL_TRACKING_CC_H

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src/algorithms/tracking/gnuradio_blocks/jamfile.jam Normal file
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project : build-dir ../../../../build ;
obj gps_l1_ca_dll_pll_tracking_cc : gps_l1_ca_dll_pll_tracking_cc.cc ;

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build-project adapters ;
build-project gnuradio_blocks ;

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/*!
* \file acquisition_interface.h
* \brief Header file of the interface to an acquisition GNSS block.
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
* Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* This header file contains the interface to an abstract class
* for acquisition algorithms. Since all its methods are virtual,
* this class cannot be instantiated directly, and a subclass can only be
* instantiated directly if all inherited pure virtual methods have been
* implemented by that class or a parent class.
*
* -------------------------------------------------------------------------
*
* 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 GNSS_SDR_ACQUISITION_INTERFACE_H_
#define GNSS_SDR_ACQUISITION_INTERFACE_H_
#include "gnss_block_interface.h"
template<typename Data>class concurrent_queue;
/*! \brief This abstract class represents an interface to an acquisition GNSS block.
*
* Abstract class for acquisition algorithms. Since all its methods are virtual,
* this class cannot be instantiated directly, and a subclass can only be
* instantiated directly if all inherited pure virtual methods have been
* implemented by that class or a parent class.
*/
class AcquisitionInterface: public GNSSBlockInterface
{
public:
//virtual void set_active(bool active) = 0;
virtual void set_satellite(unsigned int satellite) = 0;
virtual void set_channel(unsigned int channel) = 0;
virtual void set_threshold(float threshold) = 0;
virtual void set_doppler_max(unsigned int doppler_max) = 0;
virtual void set_doppler_step(unsigned int doppler_step) = 0;
virtual void set_channel_queue(concurrent_queue<int> *channel_internal_queue) = 0;
virtual signed int prn_code_phase() = 0;
virtual float doppler_freq_shift() = 0;
virtual signed int mag() = 0;
virtual void reset() = 0;
virtual unsigned long int get_sample_stamp() = 0;
};
#endif /* GNSS_SDR_ACQUISITION_INTERFACE */

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/*!
* \file channel_interface.h
* \brief This class represents an interface to a channel GNSS block.
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
* Luis Esteve, 2011. luis(at)epsilon-formacion.com
*
* Abstract class for channel blocks. Since all its methods are virtual,
* this class cannot be instantiated directly, and a subclass can only be
* instantiated directly if all inherited pure virtual methods have been
* implemented by that class or a parent class.
*
* -------------------------------------------------------------------------
*
* 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 GNSS_SDR_CHANNEL_INTERFACE_H_
#define GNSS_SDR_CHANNEL_INTERFACE_H_
#include "gnss_block_interface.h"
/*!
* \brief This abstract class represents an interface to a channel GNSS block.
*
* Abstract class for channel blocks. Since all its methods are virtual,
* this class cannot be instantiated directly, and a subclass can only be
* instantiated directly if all inherited pure virtual methods have been
* implemented by that class or a parent class.
*/
class ChannelInterface: public GNSSBlockInterface
{
public:
virtual unsigned int satellite() = 0;
virtual void start_acquisition() = 0;
virtual void set_satellite(unsigned int) = 0;
virtual void start() = 0;
virtual void stop() = 0;
};
#endif /* GNSS_SDR_CHANNEL_INTERFACE_H_ */

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/*!
* \file configuration_interface.h
* \brief This class represents an interface to configuration parameters.
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
*
* The interface defines an accessor method that gets a parameter name as input
* and returns the value of this parameter, a string, as output.
* Property names are defined here. This is an abstract class for interfaces.
* Since all its methods are virtual,
* this class cannot be instantiated directly, and a subclass can only be
* instantiated directly if all inherited pure virtual methods have been
* implemented by that class or a parent class.
*
* -------------------------------------------------------------------------
*
* 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 GNSS_SDR_CONFIGURATION_INTERFACE_H_
#define GNSS_SDR_CONFIGURATION_INTERFACE_H_
#include <string>
/*!
* \brief This abstract class represents an interface to configuration parameters.
*
* The interface defines an accessor method that gets a parameter name as input
* and returns the value of this parameter, a string, as output.
* Property names are defined here. This is an abstract class for interfaces.
* Since all its methods are virtual,
* this class cannot be instantiated directly, and a subclass can only be
* instantiated directly if all inherited pure virtual methods have been
* implemented by that class or a parent class.
*/
class ConfigurationInterface
{
public:
virtual ~ConfigurationInterface()
{}
virtual std::string property(std::string property_name,
std::string default_value) = 0;
virtual bool property(std::string property_name, bool default_value) = 0;
virtual long property(std::string property_name, long default_value) = 0;
virtual int property(std::string property_name, int default_value) = 0;
virtual unsigned int property(std::string property_name,
unsigned int default_value) = 0;
virtual float property(std::string property_name, float default_value) = 0;
virtual double property(std::string property_name, double default_value) = 0;
virtual void set_property(std::string property_name, std::string value) = 0;
};
#endif /*GNSS_SDR_CONFIGURATION_INTERFACE_H_*/

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/*!
* \file gnss_block_interface.h
* \brief This interface represents a GNSS block.
* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
*
* Abstract class for GNSS block interfaces. Since all its methods are virtual,
* this class cannot be instantiated directly, and a subclass can only be
* instantiated directly if all inherited pure virtual methods have been
* implemented by that class or a parent class.
*
* -------------------------------------------------------------------------
*
* 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 GNSS_SDR_GNSS_BLOCK_INTERFACE_H_
#define GNSS_SDR_GNSS_BLOCK_INTERFACE_H_
#include <gnuradio/gr_hier_block2.h>
#include <gnuradio/gr_top_block.h>
/*!
* \brief This abstract class represents an interface to GNSS blocks.
*
* Abstract class for GNSS block interfaces. Since all its methods are virtual,
* this class cannot be instantiated directly, and a subclass can only be
* instantiated directly if all inherited pure virtual methods have been
* implemented by that class or a parent class.
*/
class GNSSBlockInterface
{
public:
virtual ~GNSSBlockInterface()
{}
virtual std::string role() = 0;
virtual std::string implementation() = 0;
virtual size_t item_size() = 0;
virtual void connect(gr_top_block_sptr top_block) = 0;
virtual void disconnect(gr_top_block_sptr top_block) = 0;
virtual gr_basic_block_sptr get_left_block() = 0;
virtual gr_basic_block_sptr get_right_block() = 0;
};
#endif /*GNSS_SDR_GNSS_BLOCK_INTERFACE_H_*/

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/*!
* \file pseudorange_interface.h
* \brief This class represents an interface to a navigation gnss block.
* \author Javier Arribas, 2011. jarribas(at)cttc.es
*
* Abstract class for pseudorange_intefaces. Since all its methods are virtual,
* this class cannot be instantiated directly, and a subclass can only be
* instantiated directly if all inherited pure virtual methods have been
* implemented by that class or a parent class.
*
* -------------------------------------------------------------------------
*
* 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 GNSS_SDR_OBSERVABLES_INTERFACE_H_
#define GNSS_SDR_OBSERVABLES_INTERFACE_H_
#include "gnss_block_interface.h"
/*!
* \brief This abstract class represents an interface to an observables block.
*
* Abstract class for pseudorange_intefaces, derived from GNSSBlockInterface.
* Since all its methods are virtual,
* this class cannot be instantiated directly, and a subclass can only be
* instantiated directly if all inherited pure virtual methods have been
* implemented by that class or a parent class.
*/
class ObservablesInterface : public GNSSBlockInterface
{
public:
virtual void reset() = 0;
};
#endif /* GNSS_SDR_OBSERVABLES_INTERFACE_H_ */

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/*!
* \file navigation_interface.h
* \brief This class represents an interface to a navigation GNSS block.
* \author Javier Arribas, 2011. jarribas(at)cttc.es
*
* Abstract class for navigation interfaces. Since all its methods are virtual,
* this class cannot be instantiated directly, and a subclass can only be
* instantiated directly if all inherited pure virtual methods have been
* implemented by that class or a parent class.
*
* -------------------------------------------------------------------------
*
* 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 GNSS_SDR_TELEMETRY_DECODER_INTERFACE_H_
#define GNSS_SDR_TELEMETRY_DECODER_INTERFACE_H_
#include "gnss_block_interface.h"
/*!
* \brief This abstract class represents an interface to a navigation GNSS block.
*
* Abstract class for navigation interfaces. Since all its methods are virtual,
* this class cannot be instantiated directly, and a subclass can only be
* instantiated directly if all inherited pure virtual methods have been
* implemented by that class or a parent class.
*/
class TelemetryDecoderInterface : public GNSSBlockInterface
{
public:
virtual void reset() = 0;
virtual void set_satellite(int satellite) = 0;
virtual void set_channel(int channel) = 0;
};
#endif /* GNSS_SDR_TELEMETRY_DECODER_INTERFACE_H_ */

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