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repetition_decoder.h
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/* -*- c++ -*- */
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/*
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* Copyright 2014 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 INCLUDED_FEC_REPETITION_DECODER_H
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#define INCLUDED_FEC_REPETITION_DECODER_H
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#include <
gnuradio/fec/api.h
>
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#include <
gnuradio/fec/generic_decoder.h
>
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#include <map>
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#include <string>
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namespace
gr {
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namespace
fec {
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namespace
code {
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/*!
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* \brief Repetition Decoding class.
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* \ingroup error_coding_blk
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*
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* \details
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* A repetition decoder class. This takes a majority vote,
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* biased by the \p ap_prob rate, and decides if the number of 1
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* bits > ap_prob, it is a 1; else, it is a 0.
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*/
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class
FEC_API
repetition_decoder
:
virtual
public
generic_decoder
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{
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public
:
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/*!
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* Build a repetition decoding FEC API object.
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*
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* \param frame_size Number of bits per frame. If using in the
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* tagged stream style, this is the maximum allowable
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* number of bits per frame.
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* \param rep Repetition rate; encoder rate is rep bits out
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* for each input bit.
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* \param ap_prob The a priori probability that a bit is a 1
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* (generally, unless otherwise known, assume to be
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* 0.5).
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*/
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static
generic_decoder::sptr
make(
int
frame_size,
int
rep,
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float
ap_prob=0.5);
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/*!
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* Sets the uncoded frame size to \p frame_size. If \p
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* frame_size is greater than the value given to the
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* constructor, the frame size will be capped by that initial
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* value and this function will return false. Otherwise, it
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* returns true.
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*/
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virtual
bool
set_frame_size(
unsigned
int
frame_size) = 0;
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/*!
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* Returns the coding rate of this encoder (it will always be 1).
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*/
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virtual
double
rate() = 0;
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};
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}
/* namespace code */
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}
/* namespace fec */
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}
/* namespace gr */
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#endif
/* INCLUDED_FEC_REPETITION_DECODER_H */
gr-fec
include
gnuradio
fec
repetition_decoder.h
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