mirror of
https://github.com/gnss-sdr/gnss-sdr
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4fea48f603
Fix compilation of some optional blocks when linking against GR 3.9 Fix warning -Wembedded-directive: embedding a directive within macro arguments has undefined behavior
83 lines
2.2 KiB
C++
83 lines
2.2 KiB
C++
/*!
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* \file notch_cc.h
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* \brief Implements a notch filter 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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* 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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*/
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#ifndef GNSS_SDR_NOTCH_CC_H
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#define GNSS_SDR_NOTCH_CC_H
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#include "gnss_block_interface.h"
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#include "gnss_sdr_fft.h"
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#include <gnuradio/block.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 Notch;
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using notch_sptr = gnss_shared_ptr<Notch>;
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notch_sptr make_notch_filter(
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float pfa,
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float p_c_factor,
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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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/*!
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* \brief This class implements a real-time software-defined multi state notch filter
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*/
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class Notch : public gr::block
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{
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public:
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~Notch() = 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_sptr make_notch_filter(float pfa, float p_c_factor, int32_t length, int32_t n_segments_est, int32_t n_segments_reset);
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Notch(float pfa, float p_c_factor, int32_t length, int32_t n_segments_est, int32_t n_segments_reset);
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std::unique_ptr<gnss_fft_complex_fwd> d_fft_;
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volk_gnsssdr::vector<gr_complex> c_samples_;
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volk_gnsssdr::vector<float> angle_;
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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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float pfa_;
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float noise_pow_est_;
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float thres_;
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int32_t length_;
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int32_t n_deg_fred_;
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uint32_t n_segments_;
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uint32_t n_segments_est_;
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uint32_t n_segments_reset_;
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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_CC_H
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