mirror of https://github.com/gnss-sdr/gnss-sdr
363 lines
17 KiB
C++
363 lines
17 KiB
C++
/*!
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* \file freq_xlating_fir_filter.cc
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* \brief Adapts a gnuradio gr_freq_xlating_fir_filter designed with gr_remez or gr_firdes
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* \author Luis Esteve, 2012. luis(at)epsilon-formacion.com
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* Antonio Ramos, 2017. antonio.ramos(at)cttc.es
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*
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* -----------------------------------------------------------------------------
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*
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* GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
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* This file is part of GNSS-SDR.
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*
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* Copyright (C) 2010-2020 (see AUTHORS file for a list of contributors)
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* SPDX-License-Identifier: GPL-3.0-or-later
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*
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* -----------------------------------------------------------------------------
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*/
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#include "freq_xlating_fir_filter.h"
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#include "configuration_interface.h"
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#include <glog/logging.h>
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#include <gnuradio/blocks/file_sink.h>
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#include <gnuradio/filter/firdes.h>
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#include <gnuradio/filter/pm_remez.h>
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#include <volk/volk.h>
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#include <utility>
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FreqXlatingFirFilter::FreqXlatingFirFilter(const ConfigurationInterface* configuration, std::string role,
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unsigned int in_streams, unsigned int out_streams) : role_(std::move(role)), in_streams_(in_streams), out_streams_(out_streams)
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{
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const std::string default_input_item_type("gr_complex");
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const std::string default_output_item_type("gr_complex");
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const std::string default_taps_item_type("float");
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const std::string default_dump_filename("../data/input_filter.dat");
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const double default_intermediate_freq = 0.0;
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const double default_sampling_freq = 4000000.0;
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const int default_number_of_taps = 6;
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const unsigned int default_number_of_bands = 2;
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const std::vector<double> default_bands = {0.0, 0.4, 0.6, 1.0};
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const std::vector<double> default_ampl = {1.0, 1.0, 0.0, 0.0};
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const std::vector<double> default_error_w = {1.0, 1.0};
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const std::string default_filter_type("bandpass");
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const int default_grid_density = 16;
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const int default_decimation_factor = 1;
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DLOG(INFO) << "role " << role_;
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input_item_type_ = configuration->property(role_ + ".input_item_type", default_input_item_type);
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output_item_type_ = configuration->property(role_ + ".output_item_type", default_output_item_type);
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taps_item_type_ = configuration->property(role_ + ".taps_item_type", default_taps_item_type);
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dump_ = configuration->property(role_ + ".dump", false);
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dump_filename_ = configuration->property(role_ + ".dump_filename", default_dump_filename);
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intermediate_freq_ = configuration->property(role_ + ".IF", default_intermediate_freq);
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sampling_freq_ = configuration->property(role_ + ".sampling_frequency", default_sampling_freq);
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const int number_of_taps = configuration->property(role_ + ".number_of_taps", default_number_of_taps);
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const unsigned int number_of_bands = configuration->property(role_ + ".number_of_bands", default_number_of_bands);
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const std::string filter_type = configuration->property(role_ + ".filter_type", default_filter_type);
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decimation_factor_ = configuration->property(role_ + ".decimation_factor", default_decimation_factor);
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if (filter_type != "lowpass")
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{
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std::vector<double> bands;
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std::vector<double> ampl;
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std::vector<double> error_w;
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std::string option;
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double option_value;
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for (unsigned int i = 0; i < number_of_bands; i++)
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{
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option = ".band" + std::to_string(i + 1) + "_begin";
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option_value = configuration->property(role_ + option, default_bands[i]);
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bands.push_back(option_value);
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option = ".band" + std::to_string(i + 1) + "_end";
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option_value = configuration->property(role_ + option, default_bands[i]);
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bands.push_back(option_value);
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option = ".ampl" + std::to_string(i + 1) + "_begin";
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option_value = configuration->property(role_ + option, default_bands[i]);
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ampl.push_back(option_value);
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option = ".ampl" + std::to_string(i + 1) + "_end";
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option_value = configuration->property(role_ + option, default_bands[i]);
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ampl.push_back(option_value);
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option = ".band" + std::to_string(i + 1) + "_error";
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option_value = configuration->property(role_ + option, default_bands[i]);
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error_w.push_back(option_value);
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}
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const int grid_density = configuration->property(role_ + ".grid_density", default_grid_density);
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const std::vector<double> taps_d = gr::filter::pm_remez(number_of_taps - 1, bands, ampl, error_w, filter_type, grid_density);
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taps_.reserve(taps_d.size());
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for (const auto& it : taps_d)
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{
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taps_.push_back(static_cast<float>(it));
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}
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}
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else
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{
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const double default_bw = (sampling_freq_ / decimation_factor_) / 2;
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const double bw_ = configuration->property(role_ + ".bw", default_bw);
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const double default_tw = bw_ / 10.0;
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const double tw_ = configuration->property(role_ + ".tw", default_tw);
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taps_ = gr::filter::firdes::low_pass(1.0, sampling_freq_, bw_, tw_);
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}
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size_t item_size;
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LOG(INFO) << "Created freq_xlating_fir_filter with " << taps_.size() << " taps";
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if ((taps_item_type_ == "float") && (input_item_type_ == "gr_complex") && (output_item_type_ == "gr_complex"))
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{
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item_size = sizeof(gr_complex); // output
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input_size_ = sizeof(gr_complex); // input
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freq_xlating_fir_filter_ccf_ = gr::filter::freq_xlating_fir_filter_ccf::make(decimation_factor_, taps_, intermediate_freq_, sampling_freq_);
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DLOG(INFO) << "input_filter(" << freq_xlating_fir_filter_ccf_->unique_id() << ")";
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}
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else if ((taps_item_type_ == "float") && (input_item_type_ == "float") && (output_item_type_ == "gr_complex"))
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{
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item_size = sizeof(gr_complex);
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input_size_ = sizeof(float); // input
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freq_xlating_fir_filter_fcf_ = gr::filter::freq_xlating_fir_filter_fcf::make(decimation_factor_, taps_, intermediate_freq_, sampling_freq_);
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DLOG(INFO) << "input_filter(" << freq_xlating_fir_filter_fcf_->unique_id() << ")";
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}
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else if ((taps_item_type_ == "float") && (input_item_type_ == "short") && (output_item_type_ == "gr_complex"))
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{
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item_size = sizeof(gr_complex);
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input_size_ = sizeof(int16_t); // input
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freq_xlating_fir_filter_scf_ = gr::filter::freq_xlating_fir_filter_scf::make(decimation_factor_, taps_, intermediate_freq_, sampling_freq_);
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DLOG(INFO) << "input_filter(" << freq_xlating_fir_filter_scf_->unique_id() << ")";
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}
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else if ((taps_item_type_ == "float") && (input_item_type_ == "short") && (output_item_type_ == "cshort"))
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{
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item_size = sizeof(lv_16sc_t);
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input_size_ = sizeof(int16_t); // input
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freq_xlating_fir_filter_scf_ = gr::filter::freq_xlating_fir_filter_scf::make(decimation_factor_, taps_, intermediate_freq_, sampling_freq_);
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DLOG(INFO) << "input_filter(" << freq_xlating_fir_filter_scf_->unique_id() << ")";
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complex_to_float_ = gr::blocks::complex_to_float::make();
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float_to_short_1_ = gr::blocks::float_to_short::make();
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float_to_short_2_ = gr::blocks::float_to_short::make();
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short_x2_to_cshort_ = make_short_x2_to_cshort();
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}
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else if ((taps_item_type_ == "float") && (input_item_type_ == "byte") && (output_item_type_ == "gr_complex"))
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{
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item_size = sizeof(gr_complex);
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input_size_ = sizeof(int8_t); // input
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gr_char_to_short_ = gr::blocks::char_to_short::make();
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freq_xlating_fir_filter_scf_ = gr::filter::freq_xlating_fir_filter_scf::make(decimation_factor_, taps_, intermediate_freq_, sampling_freq_);
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DLOG(INFO) << "input_filter(" << freq_xlating_fir_filter_scf_->unique_id() << ")";
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}
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else if ((taps_item_type_ == "float") && (input_item_type_ == "byte") && (output_item_type_ == "cbyte"))
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{
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item_size = sizeof(lv_8sc_t);
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input_size_ = sizeof(int8_t); // input
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gr_char_to_short_ = gr::blocks::char_to_short::make();
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freq_xlating_fir_filter_scf_ = gr::filter::freq_xlating_fir_filter_scf::make(decimation_factor_, taps_, intermediate_freq_, sampling_freq_);
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DLOG(INFO) << "input_filter(" << freq_xlating_fir_filter_scf_->unique_id() << ")";
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complex_to_complex_byte_ = make_complex_float_to_complex_byte();
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}
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else
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{
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LOG(ERROR) << " Unknown input filter input/output item type conversion";
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item_size = sizeof(gr_complex); // avoids uninitialization
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input_size_ = sizeof(gr_complex); // avoids uninitialization
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}
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if (dump_)
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{
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DLOG(INFO) << "Dumping output into file " << dump_filename_;
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std::cout << "Dumping output into file " << dump_filename_ << '\n';
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file_sink_ = gr::blocks::file_sink::make(item_size, dump_filename_.c_str());
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}
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if (in_streams_ > 1)
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{
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LOG(ERROR) << "This implementation only supports one input stream";
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}
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if (out_streams_ > 1)
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{
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LOG(ERROR) << "This implementation only supports one output stream";
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}
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}
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void FreqXlatingFirFilter::connect(gr::top_block_sptr top_block)
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{
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if ((taps_item_type_ == "float") && (input_item_type_ == "gr_complex") && (output_item_type_ == "gr_complex"))
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{
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if (dump_)
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{
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top_block->connect(freq_xlating_fir_filter_ccf_, 0, file_sink_, 0);
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}
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}
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else if ((taps_item_type_ == "float") && (input_item_type_ == "float") && (output_item_type_ == "gr_complex"))
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{
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if (dump_)
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{
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top_block->connect(freq_xlating_fir_filter_fcf_, 0, file_sink_, 0);
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}
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}
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else if ((taps_item_type_ == "float") && (input_item_type_ == "short") && (output_item_type_ == "gr_complex"))
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{
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if (dump_)
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{
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top_block->connect(freq_xlating_fir_filter_scf_, 0, file_sink_, 0);
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}
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}
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else if ((taps_item_type_ == "float") && (input_item_type_ == "short") && (output_item_type_ == "cshort"))
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{
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top_block->connect(freq_xlating_fir_filter_scf_, 0, complex_to_float_, 0);
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top_block->connect(complex_to_float_, 0, float_to_short_1_, 0);
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top_block->connect(complex_to_float_, 1, float_to_short_2_, 0);
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top_block->connect(float_to_short_1_, 0, short_x2_to_cshort_, 0);
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top_block->connect(float_to_short_2_, 0, short_x2_to_cshort_, 0);
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if (dump_)
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{
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top_block->connect(short_x2_to_cshort_, 0, file_sink_, 0);
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}
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}
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else if ((taps_item_type_ == "float") && (input_item_type_ == "byte") && (output_item_type_ == "gr_complex"))
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{
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top_block->connect(gr_char_to_short_, 0, freq_xlating_fir_filter_scf_, 0);
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if (dump_)
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{
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top_block->connect(freq_xlating_fir_filter_scf_, 0, file_sink_, 0);
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}
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}
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else if ((taps_item_type_ == "float") && (input_item_type_ == "byte") && (output_item_type_ == "cbyte"))
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{
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top_block->connect(gr_char_to_short_, 0, freq_xlating_fir_filter_scf_, 0);
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top_block->connect(freq_xlating_fir_filter_scf_, 0, complex_to_complex_byte_, 0);
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if (dump_)
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{
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top_block->connect(complex_to_complex_byte_, 0, file_sink_, 0);
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}
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}
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else
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{
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LOG(ERROR) << " Unknown input filter input/output item type conversion";
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}
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}
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void FreqXlatingFirFilter::disconnect(gr::top_block_sptr top_block)
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{
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if ((taps_item_type_ == "float") && (input_item_type_ == "gr_complex") && (output_item_type_ == "gr_complex"))
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{
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if (dump_)
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{
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top_block->disconnect(freq_xlating_fir_filter_ccf_, 0, file_sink_, 0);
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}
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}
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else if ((taps_item_type_ == "float") && (input_item_type_ == "float") && (output_item_type_ == "gr_complex"))
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{
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if (dump_)
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{
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top_block->disconnect(freq_xlating_fir_filter_fcf_, 0, file_sink_, 0);
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}
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}
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else if ((taps_item_type_ == "float") && (input_item_type_ == "short") && (output_item_type_ == "gr_complex"))
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{
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if (dump_)
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{
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top_block->disconnect(freq_xlating_fir_filter_scf_, 0, file_sink_, 0);
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}
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}
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else if ((taps_item_type_ == "float") && (input_item_type_ == "short") && (output_item_type_ == "cshort"))
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{
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top_block->disconnect(freq_xlating_fir_filter_scf_, 0, complex_to_float_, 0);
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top_block->disconnect(complex_to_float_, 0, float_to_short_1_, 0);
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top_block->disconnect(complex_to_float_, 1, float_to_short_2_, 0);
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top_block->disconnect(float_to_short_1_, 0, short_x2_to_cshort_, 0);
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top_block->disconnect(float_to_short_2_, 0, short_x2_to_cshort_, 0);
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if (dump_)
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{
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top_block->disconnect(short_x2_to_cshort_, 0, file_sink_, 0);
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}
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}
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else if ((taps_item_type_ == "float") && (input_item_type_ == "byte") && (output_item_type_ == "gr_complex"))
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{
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top_block->disconnect(gr_char_to_short_, 0, freq_xlating_fir_filter_scf_, 0);
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if (dump_)
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{
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top_block->disconnect(freq_xlating_fir_filter_scf_, 0, file_sink_, 0);
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}
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}
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else if ((taps_item_type_ == "float") && (input_item_type_ == "byte") && (output_item_type_ == "cbyte"))
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{
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top_block->disconnect(gr_char_to_short_, 0, freq_xlating_fir_filter_scf_, 0);
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top_block->disconnect(freq_xlating_fir_filter_scf_, 0, complex_to_complex_byte_, 0);
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if (dump_)
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{
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top_block->disconnect(complex_to_complex_byte_, 0, file_sink_, 0);
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}
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}
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else
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{
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LOG(ERROR) << " Unknown input filter input/output item type conversion";
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}
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}
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gr::basic_block_sptr FreqXlatingFirFilter::get_left_block()
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{
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if ((taps_item_type_ == "float") && (input_item_type_ == "gr_complex") && (output_item_type_ == "gr_complex"))
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{
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return freq_xlating_fir_filter_ccf_;
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}
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if ((taps_item_type_ == "float") && (input_item_type_ == "float") && (output_item_type_ == "gr_complex"))
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{
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return freq_xlating_fir_filter_fcf_;
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}
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if ((taps_item_type_ == "float") && (input_item_type_ == "short") && (output_item_type_ == "gr_complex"))
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{
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return freq_xlating_fir_filter_scf_;
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}
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if ((taps_item_type_ == "float") && (input_item_type_ == "short") && (output_item_type_ == "cshort"))
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{
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return freq_xlating_fir_filter_scf_;
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}
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if ((taps_item_type_ == "float") && (input_item_type_ == "byte") && (output_item_type_ == "gr_complex"))
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{
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return gr_char_to_short_;
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}
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if ((taps_item_type_ == "float") && (input_item_type_ == "byte") && (output_item_type_ == "cbyte"))
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{
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return gr_char_to_short_;
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}
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LOG(WARNING) << " Unknown input filter input/output item type conversion";
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return nullptr;
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}
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gr::basic_block_sptr FreqXlatingFirFilter::get_right_block()
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{
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if ((taps_item_type_ == "float") && (input_item_type_ == "gr_complex") && (output_item_type_ == "gr_complex"))
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{
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return freq_xlating_fir_filter_ccf_;
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}
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if ((taps_item_type_ == "float") && (input_item_type_ == "float") && (output_item_type_ == "gr_complex"))
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{
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return freq_xlating_fir_filter_fcf_;
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}
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if ((taps_item_type_ == "float") && (input_item_type_ == "short") && (output_item_type_ == "gr_complex"))
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{
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return freq_xlating_fir_filter_scf_;
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}
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if ((taps_item_type_ == "float") && (input_item_type_ == "short") && (output_item_type_ == "cshort"))
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{
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return short_x2_to_cshort_;
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}
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if ((taps_item_type_ == "float") && (input_item_type_ == "byte") && (output_item_type_ == "gr_complex"))
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{
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return freq_xlating_fir_filter_scf_;
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}
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if ((taps_item_type_ == "float") && (input_item_type_ == "byte") && (output_item_type_ == "cbyte"))
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{
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return complex_to_complex_byte_;
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}
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LOG(WARNING) << " Unknown input filter input/output item type conversion";
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return nullptr;
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}
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