GNU Radio Manual and C++ API Reference 3.7.14.0
The Free & Open Software Radio Ecosystem
single_viterbi_impl.h
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1/* -*- c++ -*- */
2/*
3 * Copyright 2002 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 _ATSCSINGLEVITERBI_H_
24#define _ATSCSINGLEVITERBI_H_
25
26#include <gnuradio/atsc/api.h>
27
28/*!
29 * \brief single channel viterbi decoder
30 */
32{
33
34public:
36
37 static const unsigned int TB_LEN = 32;
38
39 /*!
40 * \p INPUT ideally takes on the values +/- 1,3,5,7
41 * return is decoded dibit in the range [0, 3]
42 */
43 char decode(float input);
44
45 void reset();
46
47 //! internal delay of decoder
48 int delay() { return TB_LEN - 1; }
49
50protected:
51 static const int transition_table[32];
52 static const float was_sent[32];
53 float path_metrics[2][8];
54 unsigned long long traceback[2][8];
55 unsigned char phase;
56};
57
58#endif
single channel viterbi decoder
Definition: single_viterbi_impl.h:32
char decode(float input)
int delay()
internal delay of decoder
Definition: single_viterbi_impl.h:48
unsigned char phase
Definition: single_viterbi_impl.h:55
#define ATSC_API
Definition: gr-atsc/include/gnuradio/atsc/api.h:30