File: ofdm.h

package info (click to toggle)
libitpp 4.0.4-2
  • links: PTS, VCS
  • area: main
  • in suites: lenny
  • size: 7,520 kB
  • ctags: 6,341
  • sloc: cpp: 51,608; sh: 9,248; makefile: 636; fortran: 8
file content (71 lines) | stat: -rw-r--r-- 2,616 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
/*!
 * \file
 * \brief Interface of an Orthogonal Frequency Division Multiplex
 * (OFDM) class
 * \author Pal Frenger, Anders Persson and Tony Ottosson
 *
 * -------------------------------------------------------------------------
 *
 * IT++ - C++ library of mathematical, signal processing, speech processing,
 *        and communications classes and functions
 *
 * Copyright (C) 1995-2008  (see AUTHORS file for a list of contributors)
 *
 * This program 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 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * -------------------------------------------------------------------------
 */

#ifndef OFDM_H
#define OFDM_H

#include <itpp/base/vec.h>


namespace itpp {

  /*!
    \ingroup modulators
    \brief Class for modulating and demodulation of OFDM signals using the FFT

    The modulated signal is normalized taking into account the cyclic prefix
  */
  class OFDM {
  public:
    //! Empty constructor
    OFDM(void) { setup_done = false; }
    //! Constructor \a Nfft is the size of the FFT. \a Ncp is the length of the cyclic prefix. \a Nupsample is the upsampling factor (default=1)
    OFDM(int inNfft, int inNcp, int inNupsample=1);
    //! Return the number of carriers
    int no_carriers() {return Nfft;}
    //! Set parameters
    void set_parameters(const int Nfft, const int Ncp, const int inNupsample=1);
    //! Modulate complex data symbols. Length of \c input must be \c Nfft
    cvec modulate(const cvec &input);
    //! Modulate complex data symbols. Length of \c input must be \c Nfft
    void modulate(const cvec &input, cvec &output);
    //! Demodulate to complex valued symbols. Length of \c input must be \c Nfft+Ncp
    cvec demodulate(const cvec &input);
    //! Demodulate to complex valued symbols. Length of \c input must be \c Nfft+Ncp
    void demodulate(const cvec &input, cvec &output);
  private:
    double norm_factor;
    bool setup_done;
    int Nfft, Ncp, Nupsample;
  };

} // namespace itpp

#endif // #ifndef OFDM_H