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/* -*- c++ -*- */
/*
* Copyright 2015 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_DTV_DVBT_OFDM_SYM_ACQUISITION_IMPL_H
#define INCLUDED_DTV_DVBT_OFDM_SYM_ACQUISITION_IMPL_H
#include <gnuradio/dtv/dvbt_ofdm_sym_acquisition.h>
namespace gr {
namespace dtv {
class dvbt_ofdm_sym_acquisition_impl : public dvbt_ofdm_sym_acquisition
{
private:
int d_blocks;
int d_fft_length;
int d_cp_length;
float d_snr;
float d_rho;
gr_complex * d_conj;
float * d_norm;
gr_complex * d_corr;
gr_complex * d_gamma;
float * d_lambda;
// For peak detector
float d_threshold_factor_rise;
float d_avg_alpha;
float d_avg_min;
float d_avg_max;
float d_phase;
double d_phaseinc;
int d_cp_found;
double d_nextphaseinc;
int d_nextpos;
int d_initial_acquisition;
int d_cp_start;
gr_complex * d_derot;
int d_to_consume;
int d_to_out;
int d_consumed;
int d_out;
int ml_sync(const gr_complex * in, int lookup_start, int lookup_stop, int * cp_pos, gr_complex * derot, int * to_consume, int * to_out);
int peak_detect_init(float threshold_factor_rise, float alpha);
int peak_detect_process(const float * datain, const int datain_length, int * peak_pos, int * peak_max);
void send_sync_start();
void derotate(const gr_complex * in, gr_complex *out);
public:
dvbt_ofdm_sym_acquisition_impl(int blocks, int fft_length, int occupied_tones, int cp_length, float snr);
~dvbt_ofdm_sym_acquisition_impl();
void forecast (int noutput_items, gr_vector_int &ninput_items_required);
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 dtv
} // namespace gr
#endif /* INCLUDED_DTV_DVBT_OFDM_SYM_ACQUISITION_IMPL_H */
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