GNU Radio 3.7.1 C++ API
diff_decoder_bb.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_DECODER_BB_H
00024 #define INCLUDED_GR_DIFF_DECODER_BB_H
00025 
00026 #include <gnuradio/digital/api.h>
00027 #include <gnuradio/sync_block.h>
00028 
00029 namespace gr {
00030   namespace digital {
00031 
00032     /*!
00033      * \brief Differential encoder: y[0] = (x[0] - x[-1]) % M
00034      * \ingroup symbol_coding_blk
00035      *
00036      * \details
00037      * Uses current and previous symbols and the alphabet modulus to
00038      * perform differential decoding.
00039      */
00040     class DIGITAL_API diff_decoder_bb : virtual public sync_block
00041     {
00042     public:
00043       // gr::digital::diff_decoder_bb::sptr
00044       typedef boost::shared_ptr<diff_decoder_bb> sptr;
00045       
00046       /*!
00047        * Make a differntial decoder block.
00048        *
00049        * \param modulus Modulus of code's alphabet
00050        */
00051       static sptr make(unsigned int modulus);
00052     };
00053 
00054   } /* namespace digital */
00055 } /* namespace gr */
00056 
00057 #endif /* INCLUDED_GR_DIFF_DECODER_BB_H */