GNU Radio 3.6.3 C++ API
digital_ofdm_sampler.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 2007,2011 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 3, 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 #ifndef INCLUDED_DIGITAL_OFDM_SAMPLER_H
24 #define INCLUDED_DIGITAL_OFDM_SAMPLER_H
25 
26 #include <digital_api.h>
27 #include <gr_sync_block.h>
28 
31 
33  unsigned int symbol_length,
34  unsigned int timeout=1000);
35 
36 /*!
37  * \brief does the rest of the OFDM stuff
38  * \ingroup ofdm_blk
39  */
41 {
42  friend DIGITAL_API digital_ofdm_sampler_sptr digital_make_ofdm_sampler (unsigned int fft_length,
43  unsigned int symbol_length,
44  unsigned int timeout);
45 
46  digital_ofdm_sampler (unsigned int fft_length,
47  unsigned int symbol_length,
48  unsigned int timeout);
49 
50  private:
51  enum state_t {STATE_NO_SIG, STATE_PREAMBLE, STATE_FRAME};
52 
53  state_t d_state;
54  unsigned int d_timeout_max;
55  unsigned int d_timeout;
56  unsigned int d_fft_length;
57  unsigned int d_symbol_length;
58 
59  public:
60  void forecast (int noutput_items, gr_vector_int &ninput_items_required);
61 
62  int general_work (int noutput_items,
63  gr_vector_int &ninput_items,
64  gr_vector_const_void_star &input_items,
65  gr_vector_void_star &output_items);
66 };
67 
68 #endif