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/* -*- c++ -*- */
/*
* Copyright 2006,2012 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifndef INCLUDED_GR_DIFF_DECODER_BB_H
#define INCLUDED_GR_DIFF_DECODER_BB_H
#include <gnuradio/digital/api.h>
#include <gnuradio/sync_block.h>
namespace gr {
namespace digital {
/*!
* \brief Differential encoder: y[0] = (x[0] - x[-1]) % M
* \ingroup symbol_coding_blk
*
* \details
* Uses current and previous symbols and the alphabet modulus to
* perform differential decoding.
*/
class DIGITAL_API diff_decoder_bb : virtual public sync_block
{
public:
// gr::digital::diff_decoder_bb::sptr
typedef boost::shared_ptr<diff_decoder_bb> sptr;
/*!
* Make a differential decoder block.
*
* \param modulus Modulus of code's alphabet
*/
static sptr make(unsigned int modulus);
};
} /* namespace digital */
} /* namespace gr */
#endif /* INCLUDED_GR_DIFF_DECODER_BB_H */
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