dji_droneid/gnuradio/gr-droneid/lib/normalized_xcorr_estimate_i...

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/* -*- c++ -*- */
/*
* Copyright 2022 gr-droneid author.
*
* This 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, or (at your option)
* any later version.
*
* This software 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 this software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef INCLUDED_DRONEID_NORMALIZED_XCORR_ESTIMATE_IMPL_H
#define INCLUDED_DRONEID_NORMALIZED_XCORR_ESTIMATE_IMPL_H
#include <droneid/normalized_xcorr_estimate.h>
namespace gr {
namespace droneid {
class normalized_xcorr_estimate_impl : public normalized_xcorr_estimate {
private:
const uint32_t window_size_;
float taps_var_;
float window_size_recip_;
gr_complex window_size_recip_complex_;
std::vector<gr_complex> taps_;
std::vector<gr_complex> sums_;
std::vector<float> vars_;
std::vector<float> abs_squared_;
std::vector<gr_complex> buffer_;
const gr_complex zero_complex_ = gr_complex{0, 0};
// Nothing to declare in this block.
public:
normalized_xcorr_estimate_impl(const std::vector<gr_complex> & taps);
~normalized_xcorr_estimate_impl();
int general_work(int noutput_items,
gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
} // namespace droneid
} // namespace gr
#endif /* INCLUDED_DRONEID_NORMALIZED_XCORR_ESTIMATE_IMPL_H */