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Merge branch 'antonioramosdet-if_downconversion' into next

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This commit is contained in:
Carles Fernandez 2017-11-06 18:06:14 +01:00
commit c5d4ce239f
3 changed files with 87 additions and 46 deletions
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94
src/algorithms/input_filter/adapters/freq_xlating_fir_filter.cc
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@ -1,11 +1,12 @@
/*!
* \file freq_xlating_fir_filter.cc
* \brief Adapts a gnuradio gr_freq_xlating_fir_filter designed with gr_remez
* \brief Adapts a gnuradio gr_freq_xlating_fir_filter designed with gr_remez or gr_firdes
* \author Luis Esteve, 2012. luis(at)epsilon-formacion.com
* Antonio Ramos, 2017. antonio.ramos(at)cttc.es
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2015 (see AUTHORS file for a list of contributors)
* Copyright (C) 2010-2017 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
@ -32,6 +33,7 @@
#include <boost/lexical_cast.hpp>
#include <gnuradio/blocks/file_sink.h>
#include <gnuradio/filter/pm_remez.h>
#include <gnuradio/filter/firdes.h>
#include <glog/logging.h>
#include <volk/volk.h>
#include "configuration_interface.h"
@ -343,8 +345,8 @@ void FreqXlatingFirFilter::init()
std::string default_output_item_type = "gr_complex";
std::string default_taps_item_type = "float";
std::string default_dump_filename = "../data/input_filter.dat";
double default_intermediate_freq = 0;
double default_sampling_freq = 4000000;
double default_intermediate_freq = 0.0;
double default_sampling_freq = 4000000.0;
int default_number_of_taps = 6;
unsigned int default_number_of_bands = 2;
std::vector<double> default_bands = { 0.0, 0.4, 0.6, 1.0 };
@ -364,46 +366,54 @@ void FreqXlatingFirFilter::init()
sampling_freq_ = config_->property(role_ + ".sampling_frequency", default_sampling_freq);
int number_of_taps = config_->property(role_ + ".number_of_taps", default_number_of_taps);
unsigned int number_of_bands = config_->property(role_ + ".number_of_bands", default_number_of_bands);
std::vector<double> bands;
std::vector<double> ampl;
std::vector<double> error_w;
std::string option;
double option_value;
for (unsigned int i = 0; i < number_of_bands; i++)
{
option = ".band" + boost::lexical_cast<std::string>(i + 1) + "_begin";
option_value = config_->property(role_ + option, default_bands[i]);
bands.push_back(option_value);
option = ".band" + boost::lexical_cast<std::string>(i + 1) + "_end";
option_value = config_->property(role_ + option, default_bands[i]);
bands.push_back(option_value);
option = ".ampl" + boost::lexical_cast<std::string>(i + 1) + "_begin";
option_value = config_->property(role_ + option, default_bands[i]);
ampl.push_back(option_value);
option = ".ampl" + boost::lexical_cast<std::string>(i + 1) + "_end";
option_value = config_->property(role_ + option, default_bands[i]);
ampl.push_back(option_value);
option = ".band" + boost::lexical_cast<std::string>(i + 1) + "_error";
option_value = config_->property(role_ + option, default_bands[i]);
error_w.push_back(option_value);
}
std::string filter_type = config_->property(role_ + ".filter_type", default_filter_type);
int grid_density = config_->property(role_ + ".grid_density", default_grid_density);
std::vector<double> taps_d = gr::filter::pm_remez(number_of_taps - 1, bands, ampl,
error_w, filter_type, grid_density);
taps_.reserve(taps_d.size());
for (std::vector<double>::iterator it = taps_d.begin(); it != taps_d.end(); it++)
if(filter_type.compare("lowpass") != 0)
{
taps_.push_back(float(*it));
//std::cout<<"TAP="<<float(*it)<<std::endl;
std::vector<double> taps_d;
std::vector<double> bands;
std::vector<double> ampl;
std::vector<double> error_w;
std::string option;
double option_value;
for (unsigned int i = 0; i < number_of_bands; i++)
{
option = ".band" + boost::lexical_cast<std::string>(i + 1) + "_begin";
option_value = config_->property(role_ + option, default_bands[i]);
bands.push_back(option_value);
option = ".band" + boost::lexical_cast<std::string>(i + 1) + "_end";
option_value = config_->property(role_ + option, default_bands[i]);
bands.push_back(option_value);
option = ".ampl" + boost::lexical_cast<std::string>(i + 1) + "_begin";
option_value = config_->property(role_ + option, default_bands[i]);
ampl.push_back(option_value);
option = ".ampl" + boost::lexical_cast<std::string>(i + 1) + "_end";
option_value = config_->property(role_ + option, default_bands[i]);
ampl.push_back(option_value);
option = ".band" + boost::lexical_cast<std::string>(i + 1) + "_error";
option_value = config_->property(role_ + option, default_bands[i]);
error_w.push_back(option_value);
}
int grid_density = config_->property(role_ + ".grid_density", default_grid_density);
taps_d = gr::filter::pm_remez(number_of_taps - 1, bands, ampl, error_w, filter_type, grid_density);
taps_.reserve(taps_d.size());
for (std::vector<double>::iterator it = taps_d.begin(); it != taps_d.end(); it++)
{
taps_.push_back(static_cast<float>(*it));
}
}
else
{
double default_bw = 2000000.0;
double bw_ = config_->property(role_ + ".bw", default_bw);
double default_tw = bw_ / 20.0;
double tw_ = config_->property(role_ + ".tw", default_tw);
taps_ = gr::filter::firdes::low_pass(1.0, sampling_freq_, bw_ / 2.0, tw_);
}
}

36
src/algorithms/input_filter/adapters/pulse_blanking_filter.cc
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@ -28,10 +28,13 @@
* -------------------------------------------------------------------------
*/
#include "pulse_blanking_filter.h"
#include <boost/lexical_cast.hpp>
#include <vector>
#include <cmath>
#include <glog/logging.h>
#include <gnuradio/filter/firdes.h>
#include "configuration_interface.h"
#include "pulse_blanking_filter.h"
using google::LogMessage;
@ -71,7 +74,19 @@ PulseBlankingFilter::PulseBlankingFilter(ConfigurationInterface* configuration,
item_size = sizeof(gr_complex); //avoids uninitialization
input_size_ = sizeof(gr_complex); //avoids uninitialization
}
double default_if = 0.0;
double if_ = config_->property(role_ + ".if", default_if);
if (std::abs(if_) > 1.0)
{
double default_sampling_freq = 4000000.0;
double sampling_freq_ = config_->property(role_ + ".sampling_frequency", default_sampling_freq);
double default_bw = 2000000.0;
double bw_ = config_->property(role_ + ".bw", default_bw);
double default_tw = bw_ / 20.0;
double tw_ = config_->property(role_ + ".tw", default_tw);
const std::vector<float> taps = gr::filter::firdes::low_pass(1.0, sampling_freq_, bw_ / 2.0, tw_);
freq_xlating_ = gr::filter::freq_xlating_fir_filter_ccf::make(1, taps, if_, sampling_freq_);
}
if (dump_)
{
DLOG(INFO) << "Dumping output into file " << dump_filename_;
@ -95,6 +110,10 @@ void PulseBlankingFilter::connect(gr::top_block_sptr top_block)
{
top_block->connect(pulse_blanking_cc_, 0, file_sink_, 0);
}
if (std::abs(config_->property(role_ + ".if", 0.0)) > 1.0)
{
top_block->connect(freq_xlating_, 0, pulse_blanking_cc_, 0);
}
}
else
@ -113,6 +132,10 @@ void PulseBlankingFilter::disconnect(gr::top_block_sptr top_block)
{
top_block->disconnect(pulse_blanking_cc_, 0, file_sink_, 0);
}
if (std::abs(config_->property(role_ + ".if", 0.0)) > 1.0)
{
top_block->disconnect(freq_xlating_, 0, pulse_blanking_cc_, 0);
}
}
else
{
@ -125,7 +148,14 @@ gr::basic_block_sptr PulseBlankingFilter::get_left_block()
{
if (input_item_type_.compare("gr_complex") == 0)
{
return pulse_blanking_cc_;
if (std::abs(config_->property(role_ + ".if", 0.0)) > 1.0)
{
return freq_xlating_;
}
else
{
return pulse_blanking_cc_;
}
}
else
{

3
src/algorithms/input_filter/adapters/pulse_blanking_filter.h
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@ -33,8 +33,8 @@
#define GNSS_SDR_PULSE_BLANKING_FILTER_H_
#include <string>
#include <vector>
#include <gnuradio/blocks/file_sink.h>
#include <gnuradio/filter/freq_xlating_fir_filter_ccf.h>
#include "gnss_block_interface.h"
#include "pulse_blanking_cc.h"
@ -82,6 +82,7 @@ private:
unsigned int out_streams_;
gr::blocks::file_sink::sptr file_sink_;
pulse_blanking_cc_sptr pulse_blanking_cc_;
gr::filter::freq_xlating_fir_filter_ccf::sptr freq_xlating_;
};
#endif // GNSS_SDR_PULSE_BLANKING_FILTER_H_