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gnss-sdr/src/tests/gnss_block/gps_l1_ca_pcps_acquisition_...

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/*!
* \file gps_l1_ca_pcps_acquisition_test.cc
* \brief This class implements an acquisition test for
* GpsL1CaPcpsAcquisition class based on some input parameters.
* \author Luis Esteve, 2012. luis(at)epsilon-formacion.com
*
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2014 (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 <ctime>
#include <iostream>
#include <gnuradio/top_block.h>
#include <gnuradio/blocks/file_source.h>
#include <gnuradio/analog/sig_source_waveform.h>
#include <gnuradio/analog/sig_source_c.h>
#include <gnuradio/msg_queue.h>
#include <gnuradio/blocks/null_sink.h>
#include "gnss_block_factory.h"
#include "gnss_block_interface.h"
#include "in_memory_configuration.h"
#include "gnss_sdr_valve.h"
#include "gnss_synchro.h"
#include "gps_l1_ca_pcps_acquisition.h"
class GpsL1CaPcpsAcquisitionTest: public ::testing::Test
{
protected:
GpsL1CaPcpsAcquisitionTest()
{
queue = gr::msg_queue::make(0);
top_block = gr::make_top_block("Acquisition test");
factory = std::make_shared<GNSSBlockFactory>();
config = std::make_shared<InMemoryConfiguration>();
item_size = sizeof(gr_complex);
stop = false;
message = 0;
}
~GpsL1CaPcpsAcquisitionTest()
{}
void init();
void start_queue();
void wait_message();
void stop_queue();
gr::msg_queue::sptr queue;
gr::top_block_sptr top_block;
std::shared_ptr<GNSSBlockFactory> factory;
std::shared_ptr<InMemoryConfiguration> config;
Gnss_Synchro gnss_synchro;
size_t item_size;
concurrent_queue<int> channel_internal_queue;
bool stop;
int message;
boost::thread ch_thread;
};
void GpsL1CaPcpsAcquisitionTest::init()
{
gnss_synchro.Channel_ID = 0;
gnss_synchro.System = 'G';
std::string signal = "1C";
signal.copy(gnss_synchro.Signal, 2, 0);
gnss_synchro.PRN = 1;
config->set_property("GNSS-SDR.internal_fs_hz", "4000000");
config->set_property("Acquisition.item_type", "gr_complex");
config->set_property("Acquisition.if", "0");
config->set_property("Acquisition.coherent_integration_time_ms", "1");
config->set_property("Acquisition.dump", "false");
config->set_property("Acquisition.implementation", "GPS_L1_CA_PCPS_Acquisition");
config->set_property("Acquisition.threshold", "0.000");
config->set_property("Acquisition.doppler_max", "7200");
config->set_property("Acquisition.doppler_step", "600");
config->set_property("Acquisition.repeat_satellite", "false");
}
void GpsL1CaPcpsAcquisitionTest::start_queue()
{
ch_thread = boost::thread(&GpsL1CaPcpsAcquisitionTest::wait_message, this);
}
void GpsL1CaPcpsAcquisitionTest::wait_message()
{
while (!stop)
{
channel_internal_queue.wait_and_pop(message);
stop_queue();
}
}
void GpsL1CaPcpsAcquisitionTest::stop_queue()
{
stop = true;
}
TEST_F(GpsL1CaPcpsAcquisitionTest, Instantiate)
{
init();
std::shared_ptr<GpsL1CaPcpsAcquisition> acquisition = std::make_shared<GpsL1CaPcpsAcquisition>(config.get(), "Acquisition", 1, 1, queue);
}
TEST_F(GpsL1CaPcpsAcquisitionTest, ConnectAndRun)
{
int fs_in = 4000000;
int nsamples = 4000;
struct timeval tv;
long long int begin = 0;
long long int end = 0;
init();
std::shared_ptr<GpsL1CaPcpsAcquisition> acquisition = std::make_shared<GpsL1CaPcpsAcquisition>(config.get(), "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->connect(top_block);
boost::shared_ptr<gr::analog::sig_source_c> source = gr::analog::sig_source_c::make(fs_in, gr::analog::GR_SIN_WAVE, 1000, 1, gr_complex(0));
boost::shared_ptr<gr::block> valve = gnss_sdr_make_valve(sizeof(gr_complex), nsamples, queue);
top_block->connect(source, 0, valve, 0);
top_block->connect(valve, 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test." << std::endl;
EXPECT_NO_THROW( {
gettimeofday(&tv, NULL);
begin = tv.tv_sec *1000000 + tv.tv_usec;
top_block->run(); // Start threads and wait
gettimeofday(&tv, NULL);
end = tv.tv_sec *1000000 + tv.tv_usec;
}) << "Failure running the top_block." << std::endl;
std::cout << "Processed " << nsamples << " samples in " << (end - begin) << " microseconds" << std::endl;
}
TEST_F(GpsL1CaPcpsAcquisitionTest, ValidationOfResults)
{
struct timeval tv;
long long int begin = 0;
long long int end = 0;
double expected_delay_samples = 127;
double expected_doppler_hz = -2400;
init();
std::shared_ptr<GpsL1CaPcpsAcquisition> acquisition = std::make_shared<GpsL1CaPcpsAcquisition>(config.get(), "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->set_channel(1);
}) << "Failure setting channel." << std::endl;
ASSERT_NO_THROW( {
acquisition->set_gnss_synchro(&gnss_synchro);
}) << "Failure setting gnss_synchro." << std::endl;
ASSERT_NO_THROW( {
acquisition->set_channel_queue(&channel_internal_queue);
}) << "Failure setting channel_internal_queue." << std::endl;
ASSERT_NO_THROW( {
acquisition->set_threshold(config->property("Acquisition.threshold", 0.0001));
}) << "Failure setting threshold." << std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_max(config->property("Acquisition.doppler_max", 10000));
}) << "Failure setting doppler_max." << std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_step(config->property("Acquisition.doppler_step", 500));
}) << "Failure setting doppler_step." << std::endl;
ASSERT_NO_THROW( {
acquisition->connect(top_block);
}) << "Failure connecting acquisition to the top_block." << std::endl;
ASSERT_NO_THROW( {
std::string path = std::string(TEST_PATH);
std::string file = path + "signal_samples/GSoC_CTTC_capture_2012_07_26_4Msps_4ms.dat";
const char * file_name = file.c_str();
gr::blocks::file_source::sptr file_source = gr::blocks::file_source::make(sizeof(gr_complex), file_name, false);
top_block->connect(file_source, 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test." << std::endl;
start_queue();
acquisition->init();
acquisition->reset();
EXPECT_NO_THROW( {
gettimeofday(&tv, NULL);
begin = tv.tv_sec*1000000 + tv.tv_usec;
top_block->run(); // Start threads and wait
gettimeofday(&tv, NULL);
end = tv.tv_sec*1000000 + tv.tv_usec;
}) << "Failure running the top_block." << std::endl;
ch_thread.timed_join(boost::posix_time::seconds(1));
unsigned long int nsamples = gnss_synchro.Acq_samplestamp_samples;
std::cout << "Acquired " << nsamples << " samples in " << (end - begin) << " microseconds" << std::endl;
ASSERT_EQ(1, message) << "Acquisition failure. Expected message: 1=ACQ SUCCESS.";
//std::cout << "----Aq_delay: " << gnss_synchro.Acq_delay_samples << std::endl;
//std::cout << "----Doppler: " << gnss_synchro.Acq_doppler_hz << std::endl;
double delay_error_samples = abs(expected_delay_samples - gnss_synchro.Acq_delay_samples);
float delay_error_chips = (float)(delay_error_samples*1023/4000);
double doppler_error_hz = abs(expected_doppler_hz - gnss_synchro.Acq_doppler_hz);
EXPECT_LE(doppler_error_hz, 333) << "Doppler error exceeds the expected value: 333 Hz = 2/(3*integration period)";
EXPECT_LT(delay_error_chips, 0.5) << "Delay error exceeds the expected value: 0.5 chips";
}
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