3 * Copyright 2004,2005 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 2, 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_SIMPLE_FRAMER_SYNC_H
24 #define INCLUDED_GR_SIMPLE_FRAMER_SYNC_H
27 * Here are a couple of maximum length sequences (m-sequences) that were generated by the
28 * the "mseq" matlab/octave code downloaded from:
29 * http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=990&objectType=file
32 * 0110100100001010111011000111110
33 * 0x690AEC76 (padded on right with a zero)
36 * 101011001101110110100100111000101111001010001100001000001111110
37 * 0xACDDA4E2F28C20FC (padded on right with a zero)
40 static const unsigned long long GRSF_SYNC = 0xacdda4e2f28c20fcULL;
42 static const int GRSF_BITS_PER_BYTE = 8;
43 static const int GRSF_SYNC_OVERHEAD = sizeof(GRSF_SYNC);
44 static const int GRSF_PAYLOAD_OVERHEAD = 1; // 1 byte seqno
45 static const int GRSF_TAIL_PAD = 1; // one byte trailing padding
46 static const int GRSF_OVERHEAD = GRSF_SYNC_OVERHEAD + GRSF_PAYLOAD_OVERHEAD + GRSF_TAIL_PAD;
49 #endif /* INCLUDED_GR_SIMPLE_FRAMER_SYNC_H */