doc/doxygen-3.4.0/trellis__siso__f_8h_source.html

00001 /* -*- c++ -*- */
00002 /*
00003  * Copyright 2004 Free Software Foundation, Inc.
00004  *
00005  * This file is part of GNU Radio
00006  *
00007  * GNU Radio is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 3, or (at your option)
00010  * any later version.
00011  *
00012  * GNU Radio is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU General Public License
00018  * along with GNU Radio; see the file COPYING.  If not, write to
00019  * the Free Software Foundation, Inc., 51 Franklin Street,
00020  * Boston, MA 02110-1301, USA.
00021  */
00022
00023 #ifndef INCLUDED_TRELLIS_SISO_F_H
00024 #define INCLUDED_TRELLIS_SISO_F_H
00025
00026 #include "fsm.h"
00027 #include "siso_type.h"
00028 #include "core_algorithms.h"
00029 #include <gr_block.h>
00030
00031 class trellis_siso_f;
00032 typedef boost::shared_ptr<trellis_siso_f> trellis_siso_f_sptr;
00033
00034 trellis_siso_f_sptr trellis_make_siso_f (
00035     const fsm &FSM,     // underlying FSM
00036     int K,              // block size in trellis steps
00037     int S0,             // initial state (put -1 if not specified)
00038     int SK,             // final state (put -1 if not specified)
00039     bool POSTI,         // true if you want a-posteriori info about the input symbols to be mux-ed in the output
00040     bool POSTO,         // true if you want a-posteriori info about the output symbols to be mux-ed in the output
00041     trellis_siso_type_t d_SISO_TYPE // perform "min-sum" or "sum-product" combining
00042 );
00043
00044
00045 /*!
00046  *  \ingroup coding_blk
00047  */
00048 class trellis_siso_f : public gr_block
00049 {
00050   fsm d_FSM;
00051   int d_K;
00052   int d_S0;
00053   int d_SK;
00054   bool d_POSTI;
00055   bool d_POSTO;
00056   trellis_siso_type_t d_SISO_TYPE;
00057   //std::vector<float> d_alpha;
00058   //std::vector<float> d_beta;
00059
00060   friend trellis_siso_f_sptr trellis_make_siso_f (
00061     const fsm &FSM,
00062     int K,
00063     int S0,
00064     int SK,
00065     bool POSTI,
00066     bool POSTO,
00067     trellis_siso_type_t d_SISO_TYPE);
00068
00069
00070   trellis_siso_f (
00071     const fsm &FSM,
00072     int K,
00073     int S0,
00074     int SK,
00075     bool POSTI,
00076     bool POSTO,
00077     trellis_siso_type_t d_SISO_TYPE);
00078
00079
00080 public:
00081   fsm FSM () const { return d_FSM; }
00082   int K () const { return d_K; }
00083   int S0 () const { return d_S0; }
00084   int SK () const { return d_SK; }
00085   bool POSTI () const { return d_POSTI; }
00086   bool POSTO () const { return d_POSTO; }
00087   trellis_siso_type_t SISO_TYPE () const { return d_SISO_TYPE; }
00088   void forecast (int noutput_items,
00089                  gr_vector_int &ninput_items_required);
00090   int general_work (int noutput_items,
00091                     gr_vector_int &ninput_items,
00092                     gr_vector_const_void_star &input_items,
00093                     gr_vector_void_star &output_items);
00094 };
00095
00096 #endif