3 * Copyright 2004 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 3, 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., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
23 #ifndef INCLUDED_TRELLIS_SISO_F_H
24 #define INCLUDED_TRELLIS_SISO_F_H
27 #include "trellis_siso_type.h"
31 typedef boost::shared_ptr<trellis_siso_f> trellis_siso_f_sptr;
33 trellis_siso_f_sptr trellis_make_siso_f (
34 const fsm &FSM, // underlying FSM
35 int K, // block size in trellis steps
36 int S0, // initial state (put -1 if not specified)
37 int SK, // final state (put -1 if not specified)
38 bool POSTI, // true if you want a-posteriori info about the input symbols to be mux-ed in the output
39 bool POSTO, // true if you want a-posteriori info about the output symbols to be mux-ed in the output
40 trellis_siso_type_t d_SISO_TYPE // perform "min-sum" or "sum-product" combining
45 class trellis_siso_f : public gr_block
53 trellis_siso_type_t d_SISO_TYPE;
54 //std::vector<float> d_alpha;
55 //std::vector<float> d_beta;
57 friend trellis_siso_f_sptr trellis_make_siso_f (
64 trellis_siso_type_t d_SISO_TYPE);
74 trellis_siso_type_t d_SISO_TYPE);
78 fsm FSM () const { return d_FSM; }
79 int K () const { return d_K; }
80 int S0 () const { return d_S0; }
81 int SK () const { return d_SK; }
82 bool POSTI () const { return d_POSTI; }
83 bool POSTO () const { return d_POSTO; }
84 trellis_siso_type_t SISO_TYPE () const { return d_SISO_TYPE; }
85 void forecast (int noutput_items,
86 gr_vector_int &ninput_items_required);
87 int general_work (int noutput_items,
88 gr_vector_int &ninput_items,
89 gr_vector_const_void_star &input_items,
90 gr_vector_void_star &output_items);