mirror of https://github.com/gnss-sdr/gnss-sdr
96 lines
2.5 KiB
C++
96 lines
2.5 KiB
C++
/*!
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* \file notch_lite_cc.h
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* \brief Implements a notch filter light algorithm
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* \author Antonio Ramos (antonio.ramosdet(at)gmail.com)
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*
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* -----------------------------------------------------------------------------
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*
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* Copyright (C) 2010-2019 (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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* SPDX-License-Identifier: GPL-3.0-or-later
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*
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* -----------------------------------------------------------------------------
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*/
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#ifndef GNSS_SDR_NOTCH_LITE_CC_H
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#define GNSS_SDR_NOTCH_LITE_CC_H
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#if GNURADIO_USES_STD_POINTERS
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#else
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#include <boost/shared_ptr.hpp>
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#endif
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#include <gnuradio/block.h>
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#include <gnuradio/fft/fft.h>
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#include <volk_gnsssdr/volk_gnsssdr_alloc.h> // for volk_gnsssdr::vector
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#include <cstdint>
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#include <memory>
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/** \addtogroup Input_Filter
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* \{ */
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/** \addtogroup Input_filter_gnuradio_blocks
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* \{ */
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class NotchLite;
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#if GNURADIO_USES_STD_POINTERS
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using notch_lite_sptr = std::shared_ptr<NotchLite>;
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#else
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using notch_lite_sptr = boost::shared_ptr<NotchLite>;
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#endif
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notch_lite_sptr make_notch_filter_lite(
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float p_c_factor,
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float pfa,
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int32_t length,
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int32_t n_segments_est,
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int32_t n_segments_reset,
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int32_t n_segments_coeff);
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/*!
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* \brief This class implements a real-time software-defined multi state notch filter light version
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*/
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class NotchLite : public gr::block
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{
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public:
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~NotchLite() = default;
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int general_work(int noutput_items, gr_vector_int &ninput_items,
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gr_vector_const_void_star &input_items,
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gr_vector_void_star &output_items);
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private:
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friend notch_lite_sptr make_notch_filter_lite(float p_c_factor, float pfa, int32_t length, int32_t n_segments_est, int32_t n_segments_reset, int32_t n_segments_coeff);
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NotchLite(float p_c_factor, float pfa, int32_t length, int32_t n_segments_est, int32_t n_segments_reset, int32_t n_segments_coeff);
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std::unique_ptr<gr::fft::fft_complex> d_fft_;
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volk_gnsssdr::vector<float> power_spect_;
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gr_complex last_out_;
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gr_complex z_0_;
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gr_complex p_c_factor_;
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gr_complex c_samples1_;
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gr_complex c_samples2_;
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float pfa_;
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float thres_;
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float noise_pow_est_;
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float angle1_;
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float angle2_;
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int32_t length_;
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int32_t n_segments_;
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int32_t n_segments_est_;
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int32_t n_segments_reset_;
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int32_t n_segments_coeff_reset_;
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int32_t n_segments_coeff_;
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int32_t n_deg_fred_;
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bool filter_state_;
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};
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/** \} */
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/** \} */
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#endif // GNSS_SDR_NOTCH_LITE_CC_H
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