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| author | Ben Reynwar <ben@reynwar.net> | 2012-08-08 14:26:07 -0700 |
|---|---|---|
| committer | Ben Reynwar <ben@reynwar.net> | 2012-08-08 14:26:07 -0700 |
| commit | 9be7c30d6df3fb8bd75db0659fa7a7d163d65657 (patch) | |
| tree | eaca0dec00f1aad0c8b883944f40e7c9730644f3 /gr-digital/include/digital_diff_encoder_bb.h | |
| parent | c27d9d3bac3a870fee9ec8c4289ae65ab4f2decc (diff) | |
| parent | 9305abf4be93205cf240e99ce7136702f724c490 (diff) | |
Merge branch 'master' into comments
Diffstat (limited to 'gr-digital/include/digital_diff_encoder_bb.h')
| -rw-r--r-- | gr-digital/include/digital_diff_encoder_bb.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/gr-digital/include/digital_diff_encoder_bb.h b/gr-digital/include/digital_diff_encoder_bb.h new file mode 100644 index 0000000000..d4be69cadd --- /dev/null +++ b/gr-digital/include/digital_diff_encoder_bb.h @@ -0,0 +1,57 @@ +/* -*- 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_ENCODER_BB_H +#define INCLUDED_GR_DIFF_ENCODER_BB_H + +#include <digital_api.h> +#include <gr_sync_block.h> + +class digital_diff_encoder_bb; +typedef boost::shared_ptr<digital_diff_encoder_bb> digital_diff_encoder_bb_sptr; + +DIGITAL_API digital_diff_encoder_bb_sptr +digital_make_diff_encoder_bb(unsigned int modulus); + +/*! + * \brief y[0] = (x[0] + y[-1]) % M + * \ingroup coding_blk + * + * Uses current and previous symbols and the alphabet modulus to + * perform differential encoding. + */ +class DIGITAL_API digital_diff_encoder_bb : public gr_sync_block +{ + friend DIGITAL_API digital_diff_encoder_bb_sptr + digital_make_diff_encoder_bb(unsigned int modulus); + digital_diff_encoder_bb(unsigned int modulus); + + unsigned int d_last_out; + unsigned int d_modulus; + + public: + int work(int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); +}; + +#endif |