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/* -*- c++ -*- */
/*
* Copyright 2006,2012 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef INCLUDED_GR_DIFF_PHASOR_CC_H
#define INCLUDED_GR_DIFF_PHASOR_CC_H
#include <digital_api.h>
#include <gr_sync_block.h>
/*!
* \brief Differential decoding based on phase change.
* \ingroup coding_blk
*
* Uses the phase difference between two symbols to determine the
* output symbol:
*
* out[i] = in[i] * conj(in[i-1]);
*/
class digital_diff_phasor_cc;
typedef boost::shared_ptr<digital_diff_phasor_cc> digital_diff_phasor_cc_sptr;
DIGITAL_API digital_diff_phasor_cc_sptr digital_make_diff_phasor_cc();
class DIGITAL_API digital_diff_phasor_cc : public gr_sync_block
{
friend DIGITAL_API digital_diff_phasor_cc_sptr
digital_make_diff_phasor_cc();
digital_diff_phasor_cc(); //constructor
public:
~digital_diff_phasor_cc(); //destructor
int work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif
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