GNU Radio 3.6.3 C++ API
gr_cpfsk_bc.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 2008 Free Software Foundation, Inc.
4  *
5  * GNU Radio is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 3, or (at your option)
8  * any later version.
9  *
10  * GNU Radio is distributed in the hope that it will be useful,
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12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with GNU Radio; see the file COPYING. If not, write to
17  * the Free Software Foundation, Inc., 51 Franklin Street,
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19  */
20 #ifndef INCLUDED_GR_CPFSK_BC_H
21 #define INCLUDED_GR_CPFSK_BC_H
22 
23 #include <gr_core_api.h>
24 #include <gr_sync_interpolator.h>
25 
26 class gr_cpfsk_bc;
27 
29 
30 GR_CORE_API gr_cpfsk_bc_sptr gr_make_cpfsk_bc(float k, float ampl, int samples_per_sym);
31 
32 /*!
33  * \brief Perform continuous phase 2-level frequency shift keying modulation
34  * on an input stream of unpacked bits.
35  * \ingroup modulation_blk
36  *
37  * \param k modulation index
38  * \param ampl output amplitude
39  * \param samples_per_sym number of output samples per input bit
40  */
41 
43 {
44 private:
45  friend GR_CORE_API gr_cpfsk_bc_sptr gr_make_cpfsk_bc(float k, float ampl, int samples_per_sym);
46 
47  gr_cpfsk_bc(float k, float ampl, int samples_per_sym);
48 
49  int d_samples_per_sym; // Samples per symbol, square pulse
50  float d_freq; // Modulation index*pi/samples_per_sym
51  float d_ampl; // Output amplitude
52  float d_phase; // Current phase
53 
54  public:
55  ~gr_cpfsk_bc();
56 
57  void set_amplitude(float amplitude) { d_ampl = amplitude; }
58 
59  int work (int noutput_items,
60  gr_vector_const_void_star &input_items,
61  gr_vector_void_star &output_items);
62 };
63 
64 #endif /* INCLUDED_GR_CPFSK_BC_H */