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
|
/* -*- c++ -*- */
/*
* Copyright 2010 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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.
*
* GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef INCLUDED_DIGITAL_GMSKMOD_BC_H
#define INCLUDED_DIGITAL_GMSKMOD_BC_H
#include <digital_cpmmod_bc.h>
class digital_gmskmod_bc;
typedef boost::shared_ptr<digital_gmskmod_bc> digital_gmskmod_bc_sptr;
digital_gmskmod_bc_sptr
digital_make_gmskmod_bc(unsigned samples_per_sym=2,
double bt=0.3, unsigned L=4);
/*!
* \brief GMSK modulator
*
* \ingroup modulation_blk
* \ingroup digital
*
* \param samples_per_sym Samples per symbol.
* \param bt The 3 dB time-bandwidth product.
* \param L The length of the phase duration in symbols. The Gaussian
* pulse is truncated after L symbols.
*
* The input of this block are symbols from an M-ary alphabet
* +/-1, +/-3, ..., +/-(M-1). Usually, M = 2 and therefore, the
* valid inputs are +/-1.
* The modulator will silently accept any other inputs, though.
* The output is the phase-modulated signal.
*/
class digital_gmskmod_bc : public digital_cpmmod_bc
{
friend digital_gmskmod_bc_sptr digital_make_gmskmod_bc(unsigned samples_per_sym,
double bt, unsigned L);
digital_gmskmod_bc(unsigned samples_per_sym,
double bt, unsigned L);
};
#endif /* INCLUDED_DIGITAL_GMSKMOD_BC_H */
|
