diff --git a/src/algorithms/libs/gnss_circular_deque.h b/src/algorithms/libs/gnss_circular_deque.h new file mode 100644 index 000000000..e1b73c87d --- /dev/null +++ b/src/algorithms/libs/gnss_circular_deque.h @@ -0,0 +1,135 @@ +/*! + * \file gnss_circular_deque.h + * \brief This class implements a circular deque for Gnss_Synchro + * + * \author Luis Esteve, 2018. antonio.ramos(at)cttc.es + * + * Detailed description of the file here if needed. + * + * ------------------------------------------------------------------------- + * + * Copyright (C) 2010-2018 (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 . + * + * ------------------------------------------------------------------------- + */ + +#ifndef GNSS_SDR_CIRCULAR_DEQUE_H_ +#define GNSS_SDR_CIRCULAR_DEQUE_H_ +#include +#include + +template +class Gnss_circular_deque +{ +public: + Gnss_circular_deque(); // Default constructor + Gnss_circular_deque(const unsigned int max_size, const unsigned int nchann); // nchann = number of channels; max_size = channel capacity + unsigned int size(const unsigned int ch); // Returns the number of available elements in a channel + T& at(const unsigned int ch, const unsigned int pos); // Returns a reference to an element + T& front(const unsigned int ch); // Returns a reference to the first element in the deque + T& back(const unsigned int ch); // Returns a reference to the last element in the deque + void push_back(const unsigned int ch, const T& new_data); // Inserts an element at the end of the deque + void pop_front(const unsigned int ch); // Removes the first element of the deque + void clear(const unsigned int ch); // Removes all the elements of the deque (Sets size to 0). Capacity is not modified + void reset(const unsigned int max_size, const unsigned int nchann); // Removes all the elements in all the channels. Re-sets the number of channels and their capacity + void reset(); // Removes all the channels (Sets nchann to 0) + +private: + std::vector> d_data; +}; + + +template +Gnss_circular_deque::Gnss_circular_deque() +{ + reset(); +} + +template +Gnss_circular_deque::Gnss_circular_deque(const unsigned int max_size, const unsigned int nchann) +{ + reset(max_size, nchann); +} + +template +unsigned int Gnss_circular_deque::size(const unsigned int ch) +{ + return d_data.at(ch).size(); +} + +template +T& Gnss_circular_deque::back(const unsigned int ch) +{ + return d_data.at(ch).back(); +} + + +template +T& Gnss_circular_deque::front(const unsigned int ch) +{ + return d_data.at(ch).front(); +} + + +template +T& Gnss_circular_deque::at(const unsigned int ch, const unsigned int pos) +{ + return d_data.at(ch).at(pos); +} + +template +void Gnss_circular_deque::clear(const unsigned int ch) +{ + d_data.at(ch).clear(); +} + +template +void Gnss_circular_deque::reset(const unsigned int max_size, const unsigned int nchann) +{ + d_data.clear(); + if (max_size > 0 and nchann > 0) + { + for (unsigned int i = 0; i < nchann; i++) + { + d_data.push_back(boost::circular_buffer(max_size)); + } + } +} + +template +void Gnss_circular_deque::reset() +{ + d_data.clear(); +} + +template +void Gnss_circular_deque::pop_front(const unsigned int ch) +{ + d_data.at(ch).pop_front(); +} + +template +void Gnss_circular_deque::push_back(const unsigned int ch, const T& new_data) +{ + d_data.at(ch).push_back(new_data); +} + +#endif /* GNSS_SDR_CIRCULAR_DEQUE_H_ */ diff --git a/src/algorithms/observables/adapters/CMakeLists.txt b/src/algorithms/observables/adapters/CMakeLists.txt index 5129e4157..882b22d83 100644 --- a/src/algorithms/observables/adapters/CMakeLists.txt +++ b/src/algorithms/observables/adapters/CMakeLists.txt @@ -26,6 +26,7 @@ include_directories( ${CMAKE_SOURCE_DIR}/src/core/interfaces ${CMAKE_SOURCE_DIR}/src/core/receiver ${CMAKE_SOURCE_DIR}/src/algorithms/observables/gnuradio_blocks + ${CMAKE_SOURCE_DIR}/src/algorithms/libs ${CMAKE_SOURCE_DIR}/src/algorithms/PVT/libs ${GLOG_INCLUDE_DIRS} ${GFlags_INCLUDE_DIRS} diff --git a/src/algorithms/observables/gnuradio_blocks/CMakeLists.txt b/src/algorithms/observables/gnuradio_blocks/CMakeLists.txt index 98b8213d8..e3db8ebcf 100644 --- a/src/algorithms/observables/gnuradio_blocks/CMakeLists.txt +++ b/src/algorithms/observables/gnuradio_blocks/CMakeLists.txt @@ -39,8 +39,8 @@ list(SORT OBS_GR_BLOCKS_HEADERS) add_library(obs_gr_blocks ${OBS_GR_BLOCKS_SOURCES} ${OBS_GR_BLOCKS_HEADERS}) source_group(Headers FILES ${OBS_GR_BLOCKS_HEADERS}) if(MATIO_FOUND) - add_dependencies(obs_gr_blocks glog-${glog_RELEASE} armadillo-${armadillo_RELEASE}) + add_dependencies(obs_gr_blocks gnss_sp_libs glog-${glog_RELEASE} armadillo-${armadillo_RELEASE}) else(MATIO_FOUND) - add_dependencies(obs_gr_blocks glog-${glog_RELEASE} armadillo-${armadillo_RELEASE} matio-${GNSSSDR_MATIO_LOCAL_VERSION}) + add_dependencies(obs_gr_blocks gnss_sp_libs glog-${glog_RELEASE} armadillo-${armadillo_RELEASE} matio-${GNSSSDR_MATIO_LOCAL_VERSION}) endif(MATIO_FOUND) -target_link_libraries(obs_gr_blocks ${GNURADIO_RUNTIME_LIBRARIES} ${ARMADILLO_LIBRARIES} ${MATIO_LIBRARIES}) +target_link_libraries(obs_gr_blocks gnss_sp_libs ${GNURADIO_RUNTIME_LIBRARIES} ${ARMADILLO_LIBRARIES} ${MATIO_LIBRARIES}) diff --git a/src/algorithms/observables/gnuradio_blocks/hybrid_observables_cc.cc b/src/algorithms/observables/gnuradio_blocks/hybrid_observables_cc.cc index 6e95da824..4b6ccfb1d 100644 --- a/src/algorithms/observables/gnuradio_blocks/hybrid_observables_cc.cc +++ b/src/algorithms/observables/gnuradio_blocks/hybrid_observables_cc.cc @@ -63,14 +63,11 @@ hybrid_observables_cc::hybrid_observables_cc(unsigned int nchannels_in, d_dump_filename = dump_filename; T_rx_s = 0.0; T_rx_step_s = 0.001; // 1 ms - max_delta = 0.15; // 150 ms + max_delta = 3.5; // 3.5 s + d_latency = 0.08; // 80 ms valid_channels.resize(d_nchannels, false); d_num_valid_channels = 0; - - for (unsigned int i = 0; i < d_nchannels; i++) - { - d_gnss_synchro_history.push_back(std::deque()); - } + d_gnss_synchro_history = new Gnss_circular_deque(static_cast(max_delta * 1000.0), d_nchannels); // ############# ENABLE DATA FILE LOG ################# if (d_dump) @@ -95,6 +92,7 @@ hybrid_observables_cc::hybrid_observables_cc(unsigned int nchannels_in, hybrid_observables_cc::~hybrid_observables_cc() { + delete d_gnss_synchro_history; if (d_dump_file.is_open()) { try @@ -302,40 +300,29 @@ int hybrid_observables_cc::save_matfile() } -bool hybrid_observables_cc::interpolate_data(Gnss_Synchro &out, std::deque &data, const double &ti) +bool hybrid_observables_cc::interpolate_data(Gnss_Synchro &out, const unsigned int &ch, const double &ti) { - if ((ti < data.front().RX_time) or (ti > data.back().RX_time)) + if ((ti < d_gnss_synchro_history->front(ch).RX_time) or (ti > d_gnss_synchro_history->back(ch).RX_time)) { return false; } - std::deque::iterator it; + std::pair ind = find_interp_elements(ch, ti); - arma::vec t = arma::vec(data.size()); - arma::vec dop = t; - arma::vec cph = t; - arma::vec tow = t; - arma::vec tiv = arma::vec(1); - arma::vec result; - tiv(0) = ti; + //Linear interpolation: y(t) = y(t1) + (y(t2) - y(t1)) * (t - t1) / (t2 - t1) - unsigned int aux = 0; - for (it = data.begin(); it != data.end(); it++) - { - t(aux) = it->RX_time; - dop(aux) = it->Carrier_Doppler_hz; - cph(aux) = it->Carrier_phase_rads; - tow(aux) = it->TOW_at_current_symbol_s; + // CARRIER PHASE INTERPOLATION - aux++; - } - arma::interp1(t, dop, tiv, result); - out.Carrier_Doppler_hz = result(0); - arma::interp1(t, cph, tiv, result); - out.Carrier_phase_rads = result(0); - arma::interp1(t, tow, tiv, result); - out.TOW_at_current_symbol_s = result(0); + out.Carrier_phase_rads = d_gnss_synchro_history->at(ch, ind.first).Carrier_phase_rads + (d_gnss_synchro_history->at(ch, ind.second).Carrier_phase_rads - d_gnss_synchro_history->at(ch, ind.first).Carrier_phase_rads) * (ti - d_gnss_synchro_history->at(ch, ind.first).RX_time) / (d_gnss_synchro_history->at(ch, ind.second).RX_time - d_gnss_synchro_history->at(ch, ind.first).RX_time); - return result.is_finite(); + // CARRIER DOPPLER INTERPOLATION + + out.Carrier_Doppler_hz = d_gnss_synchro_history->at(ch, ind.first).Carrier_Doppler_hz + (d_gnss_synchro_history->at(ch, ind.second).Carrier_Doppler_hz - d_gnss_synchro_history->at(ch, ind.first).Carrier_Doppler_hz) * (ti - d_gnss_synchro_history->at(ch, ind.first).RX_time) / (d_gnss_synchro_history->at(ch, ind.second).RX_time - d_gnss_synchro_history->at(ch, ind.first).RX_time); + + // TOW INTERPOLATION + + out.TOW_at_current_symbol_s = d_gnss_synchro_history->at(ch, ind.first).TOW_at_current_symbol_s + (d_gnss_synchro_history->at(ch, ind.second).TOW_at_current_symbol_s - d_gnss_synchro_history->at(ch, ind.first).TOW_at_current_symbol_s) * (ti - d_gnss_synchro_history->at(ch, ind.first).RX_time) / (d_gnss_synchro_history->at(ch, ind.second).RX_time - d_gnss_synchro_history->at(ch, ind.first).RX_time); + + return true; } @@ -351,6 +338,40 @@ double hybrid_observables_cc::compute_T_rx_s(const Gnss_Synchro &a) } } +std::pair hybrid_observables_cc::find_interp_elements(const unsigned int &ch, const double &ti) +{ + unsigned int closest = 0; + double dif = std::numeric_limits::max(); + double dt = 0.0; + for (unsigned int i = 0; i < d_gnss_synchro_history->size(ch); i++) + { + dt = ti - d_gnss_synchro_history->at(ch, i).RX_time; + if (dt < dif and dt > 0.0) + { + dif = dt; + closest = i; + } + } + unsigned int index1; + unsigned int index2; + if (closest == 0) + { + index1 = 0; + index2 = 1; + } + else if (closest == (d_gnss_synchro_history->size(ch) - 1)) + { + index1 = d_gnss_synchro_history->size(ch) - 2; + index2 = d_gnss_synchro_history->size(ch) - 1; + } + else + { + index1 = closest; + index2 = closest + 1; + } + return std::pair(index1, index2); +} + void hybrid_observables_cc::forecast(int noutput_items __attribute__((unused)), gr_vector_int &ninput_items_required) @@ -363,13 +384,13 @@ void hybrid_observables_cc::forecast(int noutput_items __attribute__((unused)), } -void hybrid_observables_cc::clean_history(std::deque &data) +void hybrid_observables_cc::clean_history(unsigned int pos) { - while (data.size() > 0) + while (d_gnss_synchro_history->size(pos) > 0) { - if ((T_rx_s - data.front().RX_time) > max_delta) + if ((T_rx_s - d_gnss_synchro_history->front(pos).RX_time) > max_delta) { - data.pop_front(); + d_gnss_synchro_history->pop_front(pos); } else { @@ -454,11 +475,9 @@ int hybrid_observables_cc::general_work(int noutput_items __attribute__((unused) } ////////////////////////////////////////////////////////////////////////// - std::vector>::iterator it; if (total_input_items > 0) { - i = 0; - for (it = d_gnss_synchro_history.begin(); it != d_gnss_synchro_history.end(); it++) + for (i = 0; i < d_nchannels; i++) { if (ninput_items[i] > 0) { @@ -467,26 +486,25 @@ int hybrid_observables_cc::general_work(int noutput_items __attribute__((unused) { if (in[i][aux].Flag_valid_word) { - it->push_back(in[i][aux]); - it->back().RX_time = compute_T_rx_s(in[i][aux]); + d_gnss_synchro_history->push_back(i, in[i][aux]); + d_gnss_synchro_history->back(i).RX_time = compute_T_rx_s(in[i][aux]); // Check if the last Gnss_Synchro comes from the same satellite as the previous ones - if (it->size() > 1) + if (d_gnss_synchro_history->size(i) > 1) { - if (it->front().PRN != it->back().PRN) + if (d_gnss_synchro_history->front(i).PRN != d_gnss_synchro_history->back(i).PRN) { - it->clear(); + d_gnss_synchro_history->clear(i); } } } } consume(i, ninput_items[i]); } - i++; } } for (i = 0; i < d_nchannels; i++) { - if (d_gnss_synchro_history.at(i).size() > 2) + if (d_gnss_synchro_history->size(i) > 2) { valid_channels[i] = true; } @@ -506,8 +524,8 @@ int hybrid_observables_cc::general_work(int noutput_items __attribute__((unused) { if (valid_channels[i]) { - clean_history(d_gnss_synchro_history.at(i)); - if (d_gnss_synchro_history.at(i).size() < 2) + clean_history(i); + if (d_gnss_synchro_history->size(i) < 2) { valid_channels[i] = false; } @@ -516,20 +534,19 @@ int hybrid_observables_cc::general_work(int noutput_items __attribute__((unused) // Check if there is any valid channel after computing the time distance between the Gnss_Synchro data and the receiver time d_num_valid_channels = valid_channels.count(); - double T_rx_s_out = T_rx_s - (max_delta / 2.0); + double T_rx_s_out = T_rx_s - d_latency; if ((d_num_valid_channels == 0) or (T_rx_s_out < 0.0)) { return 0; } std::vector epoch_data; - i = 0; - for (it = d_gnss_synchro_history.begin(); it != d_gnss_synchro_history.end(); it++) + for (i = 0; i < d_nchannels; i++) { if (valid_channels[i]) { - Gnss_Synchro interpolated_gnss_synchro = it->back(); - if (interpolate_data(interpolated_gnss_synchro, *it, T_rx_s_out)) + Gnss_Synchro interpolated_gnss_synchro = d_gnss_synchro_history->back(i); + if (interpolate_data(interpolated_gnss_synchro, i, T_rx_s_out)) { epoch_data.push_back(interpolated_gnss_synchro); } @@ -538,7 +555,6 @@ int hybrid_observables_cc::general_work(int noutput_items __attribute__((unused) valid_channels[i] = false; } } - i++; } d_num_valid_channels = valid_channels.count(); if (d_num_valid_channels == 0) @@ -546,14 +562,14 @@ int hybrid_observables_cc::general_work(int noutput_items __attribute__((unused) return 0; } correct_TOW_and_compute_prange(epoch_data); - std::vector::iterator it2 = epoch_data.begin(); + std::vector::iterator it = epoch_data.begin(); for (i = 0; i < d_nchannels; i++) { if (valid_channels[i]) { - out[i][0] = (*it2); + out[i][0] = (*it); out[i][0].Flag_valid_pseudorange = true; - it2++; + it++; } else { diff --git a/src/algorithms/observables/gnuradio_blocks/hybrid_observables_cc.h b/src/algorithms/observables/gnuradio_blocks/hybrid_observables_cc.h index aedba43ab..64f929857 100644 --- a/src/algorithms/observables/gnuradio_blocks/hybrid_observables_cc.h +++ b/src/algorithms/observables/gnuradio_blocks/hybrid_observables_cc.h @@ -35,12 +35,12 @@ #define GNSS_SDR_HYBRID_OBSERVABLES_CC_H #include "gnss_synchro.h" +#include "gnss_circular_deque.h" #include #include #include #include -#include -#include +#include class hybrid_observables_cc; @@ -65,18 +65,20 @@ private: friend hybrid_observables_cc_sptr hybrid_make_observables_cc(unsigned int nchannels_in, unsigned int nchannels_out, bool dump, std::string dump_filename); hybrid_observables_cc(unsigned int nchannels_in, unsigned int nchannels_out, bool dump, std::string dump_filename); - void clean_history(std::deque& data); + void clean_history(unsigned int pos); double compute_T_rx_s(const Gnss_Synchro& a); - bool interpolate_data(Gnss_Synchro& out, std::deque& data, const double& ti); + bool interpolate_data(Gnss_Synchro& out, const unsigned int& ch, const double& ti); + std::pair find_interp_elements(const unsigned int& ch, const double& ti); void correct_TOW_and_compute_prange(std::vector& data); int save_matfile(); //Tracking observable history - std::vector> d_gnss_synchro_history; + Gnss_circular_deque* d_gnss_synchro_history; boost::dynamic_bitset<> valid_channels; double T_rx_s; double T_rx_step_s; double max_delta; + double d_latency; bool d_dump; unsigned int d_nchannels; unsigned int d_num_valid_channels;