3 * Copyright 2006 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3, or (at your option)
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Radio; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
23 #ifndef INCLUDED_GR_DIFF_DECODER_BB_H
24 #define INCLUDED_GR_DIFF_DECODER_BB_H
26 #include <gr_sync_block.h>
28 class gr_diff_decoder_bb;
29 typedef boost::shared_ptr<gr_diff_decoder_bb> gr_diff_decoder_bb_sptr;
31 gr_diff_decoder_bb_sptr gr_make_diff_decoder_bb (unsigned int modulus);
34 * \brief y[0] = (x[0] - x[-1]) % M
37 * Differential decoder
39 class gr_diff_decoder_bb : public gr_sync_block
41 friend gr_diff_decoder_bb_sptr gr_make_diff_decoder_bb (unsigned int modulus);
42 gr_diff_decoder_bb(unsigned int modulus);
44 unsigned int d_modulus;
47 int work (int noutput_items,
48 gr_vector_const_void_star &input_items,
49 gr_vector_void_star &output_items);