GNU Radio v3.6.2-149-ga6d285d9 C++ API
digital_diff_phasor_cc.h
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00001 /* -*- c++ -*- */
00002 /*
00003  * Copyright 2006,2012 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_GR_DIFF_PHASOR_CC_H
00024 #define INCLUDED_GR_DIFF_PHASOR_CC_H
00025 
00026 #include <digital_api.h>
00027 #include <gr_sync_block.h>
00028 
00029 /*!
00030  * \brief Differential decoding based on phase change.
00031  * \ingroup coding_blk
00032  *
00033  * Uses the phase difference between two symbols to determine the
00034  * output symbol:
00035  *
00036  *     out[i] = in[i] * conj(in[i-1]);
00037  */
00038 class digital_diff_phasor_cc;
00039 typedef boost::shared_ptr<digital_diff_phasor_cc> digital_diff_phasor_cc_sptr;
00040 
00041 DIGITAL_API digital_diff_phasor_cc_sptr digital_make_diff_phasor_cc();
00042 
00043 
00044 class DIGITAL_API digital_diff_phasor_cc : public gr_sync_block
00045 {
00046   friend DIGITAL_API digital_diff_phasor_cc_sptr
00047     digital_make_diff_phasor_cc();
00048 
00049   digital_diff_phasor_cc();  //constructor
00050 
00051  public:
00052   ~digital_diff_phasor_cc();    //destructor
00053 
00054   int work(int noutput_items,
00055            gr_vector_const_void_star &input_items,
00056            gr_vector_void_star &output_items);
00057 };
00058 
00059 #endif