3 * Copyright 2002 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
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 2, or (at your option)
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.
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., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
23 #ifndef _ATSCSINGLEVITERBI_H_
24 #define _ATSCSINGLEVITERBI_H_
27 * \brief single channel viterbi decoder
29 class atsci_single_viterbi
33 atsci_single_viterbi ();
35 static const unsigned int TB_LEN = 32;
38 * \p INPUT ideally takes on the values +/- 1,3,5,7
39 * return is decoded dibit in the range [0, 3]
41 char decode (float input);
45 //! internal delay of decoder
46 int delay () { return TB_LEN - 1; }
49 static const int transition_table[32];
50 static const float was_sent[32];
51 float path_metrics [2][8];
52 unsigned long long traceback [2][8];