ofdm_bouzegzi_c_impl.h

Go to the documentation of this file.

/* -*- c++ -*- */
/*
 * Copyright 2019 Free Software Foundation, Inc..
 *
 * 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_INSPECTOR_OFDM_BOUZEGZI_C_IMPL_H
#define INCLUDED_INSPECTOR_OFDM_BOUZEGZI_C_IMPL_H

#include <gnuradio/fft/fft.h>
#include <inspector/ofdm_bouzegzi_c.h>

namespace gr {
namespace inspector {

class ofdm_bouzegzi_c_impl : public ofdm_bouzegzi_c
{
private:
    int d_Nb, d_len;
    double d_samp_rate;
    float *d_x1, *d_y1, *d_x2, *d_y2, *d_tmp1, *d_tmp2, *d_real_pre, *d_imag_pre,
        *d_osc_vec;
    gr_complex *d_sig_shift, *d_res;
    std::vector<int> d_alpha, d_beta;
    fft::fft_complex* d_fft;

public:
    ofdm_bouzegzi_c_impl(double samp_rate,
                         int Nb,
                         const std::vector<int>& alpha,
                         const std::vector<int>& beta);

    ~ofdm_bouzegzi_c_impl();

    void rescale_fft(bool forward);
    void do_fft(const gr_complex* in, gr_complex* out);

    float autocorr(const gr_complex* sig, int a, int b, int p);
    gr_complex autocorr_orig(const gr_complex* sig, int a, int b, int p);
    float cost_func(const gr_complex* sig, int a, int b);

    // Where all the action really happens
    int work(int noutput_items,
             gr_vector_const_void_star& input_items,
             gr_vector_void_star& output_items);
};

} // namespace inspector
} // namespace gr

#endif /* INCLUDED_INSPECTOR_OFDM_BOUZEGZI_C_IMPL_H */