mirror of https://github.com/gnss-sdr/gnss-sdr
151 lines
4.4 KiB
C++
151 lines
4.4 KiB
C++
/*!
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* \file gps_l1_ca_pcps_acquisition_fpga.h
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* \brief Adapts a PCPS acquisition block that uses the FPGA to
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* an AcquisitionInterface for GPS L1 C/A signals
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* \authors <ul>
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* <li> Marc Majoral, 2018. mmajoral(at)cttc.es
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* <li> Javier Arribas, 2011. jarribas(at)cttc.es
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* <li> Luis Esteve, 2012. luis(at)epsilon-formacion.com
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* <li> Marc Molina, 2013. marc.molina.pena(at)gmail.com
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* </ul>
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*
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* -------------------------------------------------------------------------
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*
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* Copyright (C) 2010-2018 (see AUTHORS file for a list of contributors)
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*
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* GNSS-SDR is a software defined Global Navigation
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* Satellite Systems receiver
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*
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* This file is part of GNSS-SDR.
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*
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* GNSS-SDR is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GNSS-SDR is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNSS-SDR. If not, see <https://www.gnu.org/licenses/>.
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*
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* -------------------------------------------------------------------------
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*/
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#ifndef GNSS_SDR_GPS_L1_CA_PCPS_ACQUISITION_FPGA_H_
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#define GNSS_SDR_GPS_L1_CA_PCPS_ACQUISITION_FPGA_H_
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#include "acquisition_interface.h"
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#include "gnss_synchro.h"
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#include "pcps_acquisition_fpga.h"
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#include <volk_gnsssdr/volk_gnsssdr.h>
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#include <string>
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class ConfigurationInterface;
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/*!
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* \brief This class adapts a PCPS acquisition block to an AcquisitionInterface
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* for GPS L1 C/A signals
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*/
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class GpsL1CaPcpsAcquisitionFpga : public AcquisitionInterface
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{
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public:
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GpsL1CaPcpsAcquisitionFpga(ConfigurationInterface* configuration,
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std::string role, unsigned int in_streams,
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unsigned int out_streams);
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virtual ~GpsL1CaPcpsAcquisitionFpga();
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inline std::string role() override
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{
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return role_;
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}
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/*!
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* \brief Returns "GPS_L1_CA_PCPS_Acquisition"
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*/
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inline std::string implementation() override
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{
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return "GPS_L1_CA_PCPS_Acquisition";
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}
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inline size_t item_size() override
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{
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size_t item_size = sizeof(lv_16sc_t);
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return item_size;
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}
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void connect(gr::top_block_sptr top_block) override;
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void disconnect(gr::top_block_sptr top_block) override;
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gr::basic_block_sptr get_left_block() override;
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gr::basic_block_sptr get_right_block() override;
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/*!
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* \brief Set acquisition/tracking common Gnss_Synchro object pointer
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* to efficiently exchange synchronization data between acquisition and
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* tracking blocks
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*/
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void set_gnss_synchro(Gnss_Synchro* p_gnss_synchro) override;
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/*!
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* \brief Set acquisition channel unique ID
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*/
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void set_channel(unsigned int channel) override;
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/*!
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* \brief Set statistics threshold of PCPS algorithm
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*/
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void set_threshold(float threshold) override;
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/*!
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* \brief Set maximum Doppler off grid search
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*/
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void set_doppler_max(unsigned int doppler_max) override;
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/*!
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* \brief Set Doppler steps for the grid search
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*/
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void set_doppler_step(unsigned int doppler_step) override;
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/*!
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* \brief Initializes acquisition algorithm.
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*/
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void init() override;
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/*!
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* \brief Sets local code for GPS L1/CA PCPS acquisition algorithm.
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*/
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void set_local_code() override;
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/*!
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* \brief Returns the maximum peak of grid search
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*/
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signed int mag() override;
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/*!
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* \brief Restart acquisition algorithm
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*/
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void reset() override;
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/*!
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* \brief If state = 1, it forces the block to start acquiring from the first sample
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*/
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void set_state(int state);
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private:
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ConfigurationInterface* configuration_;
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pcps_acquisition_fpga_sptr acquisition_fpga_;
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unsigned int channel_;
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unsigned int doppler_max_;
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unsigned int doppler_step_;
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Gnss_Synchro* gnss_synchro_;
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std::string role_;
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unsigned int in_streams_;
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unsigned int out_streams_;
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lv_16sc_t* d_all_fft_codes_; // memory that contains all the code ffts
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};
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#endif /* GNSS_SDR_GPS_L1_CA_PCPS_ACQUISITION_FPGA_H_ */
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