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   1 /* -*- c++ -*- */
   2 /*
   3  * Copyright 2006, 2007 Free Software Foundation, Inc.
   4  *
   5  * This file is part of GNU Radio
   6  *
   7  * GNU Radio is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2, or (at your option)
  10  * any later version.
  11  *
  12  * GNU Radio is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with GNU Radio; see the file COPYING.  If not, write to
  19  * the Free Software Foundation, Inc., 51 Franklin Street,
  20  * Boston, MA 02110-1301, USA.
  21  */
  22
  23 #include <vector>
  24
  25 GR_SWIG_BLOCK_MAGIC(gr,ofdm_correlator);
  26
  27 gr_ofdm_correlator_sptr
  28 gr_make_ofdm_correlator (unsigned int occupied_carriers,
  29                          unsigned int fft_length,
  30                          unsigned int cplen,
  31                          const std::vector<gr_complex> &known_symbol1,
  32                          const std::vector<gr_complex> &known_symbol2,
  33                          unsigned int max_fft_shift_len=4);
  34
  35 class gr_ofdm_correlator : public gr_sync_decimator
  36 {
  37  protected:
  38   gr_ofdm_correlator (unsigned int occupied_carriers,
  39                       unsigned int fft_length,
  40                       unsigned int cplen,
  41                       const std::vector<gr_complex> &known_symbol1,
  42                       const std::vector<gr_complex> &known_symbol2,
  43                       unsigned int max_fft_shift_len);
  44
  45  public:
  46   float snr() { return d_snr_est; }
  47   int general_work(int noutput_items,
  48                    gr_vector_int &ninput_items,
  49                    gr_vector_const_void_star &input_items,
  50                    gr_vector_void_star &output_items);
  51 };