GNU Radio 3.7.1-24 C++ API
single_viterbi_impl.h
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/* -*- c++ -*- */
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/*
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* Copyright 2002 Free Software Foundation, Inc.
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*
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* This file is part of GNU Radio
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*
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* GNU Radio is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* GNU Radio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Radio; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef _ATSCSINGLEVITERBI_H_
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#define _ATSCSINGLEVITERBI_H_
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#include <
gnuradio/atsc/api.h
>
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/*!
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* \brief single channel viterbi decoder
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*/
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class
ATSC_API
atsci_single_viterbi
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{
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public
:
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atsci_single_viterbi
();
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static
const
unsigned
int
TB_LEN = 32;
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/*!
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* \p INPUT ideally takes on the values +/- 1,3,5,7
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* return is decoded dibit in the range [0, 3]
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*/
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char
decode (
float
input);
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void
reset ();
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//! internal delay of decoder
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int
delay
() {
return
TB_LEN - 1; }
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protected
:
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static
const
int
transition_table[32];
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static
const
float
was_sent[32];
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float
path_metrics [2][8];
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unsigned
long
long
traceback [2][8];
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unsigned
char
phase
;
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};
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#endif
gnuradio
gr-atsc
include
gnuradio
atsc
single_viterbi_impl.h
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