GNU Radio 3.5.3.2 C++ API
digital_gmskmod_bc.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 2010 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
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10  * any later version.
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21  */
22 
23 #ifndef INCLUDED_DIGITAL_GMSKMOD_BC_H
24 #define INCLUDED_DIGITAL_GMSKMOD_BC_H
25 
26 #include <digital_api.h>
27 #include <digital_cpmmod_bc.h>
28 
29 class digital_gmskmod_bc;
31 
32 
34 digital_make_gmskmod_bc(unsigned samples_per_sym=2,
35  double bt=0.3, unsigned L=4);
36 
37 /*!
38  * \brief GMSK modulator
39  *
40  * \ingroup modulation_blk
41  * \ingroup digital
42  *
43  * \param samples_per_sym Samples per symbol.
44  * \param bt The 3 dB time-bandwidth product.
45  * \param L The length of the phase duration in symbols. The Gaussian
46  * pulse is truncated after L symbols.
47  *
48  * The input of this block are symbols from an M-ary alphabet
49  * +/-1, +/-3, ..., +/-(M-1). Usually, M = 2 and therefore, the
50  * valid inputs are +/-1.
51  * The modulator will silently accept any other inputs, though.
52  * The output is the phase-modulated signal.
53  */
55 {
56  friend DIGITAL_API digital_gmskmod_bc_sptr digital_make_gmskmod_bc(unsigned samples_per_sym,
57  double bt, unsigned L);
58  digital_gmskmod_bc(unsigned samples_per_sym,
59  double bt, unsigned L);
60 };
61 
62 #endif /* INCLUDED_DIGITAL_GMSKMOD_BC_H */
63