GNU Radio 3.6.3 C++ API
gr_simple_framer_sync.h
Go to the documentation of this file.
1 /* -*- c++ -*- */
2 /*
3  * Copyright 2004,2005 Free Software Foundation, Inc.
4  *
5  * This file is part of GNU Radio
6  *
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)
10  * any later version.
11  *
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.
16  *
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.
21  */
22 
23 #ifndef INCLUDED_GR_SIMPLE_FRAMER_SYNC_H
24 #define INCLUDED_GR_SIMPLE_FRAMER_SYNC_H
25 
26 /*!
27  * \brief Here are a couple of maximum length sequences (m-sequences) that were generated by the
28  * the "mseq" matlab/octave code downloaded from:
29  * <a href="http://www.mathworks.com/matlabcentral/fileexchange/990">http://www.mathworks.com/matlabcentral/fileexchange/990</a>
30  *
31  * <pre>
32  * 31-bit m-sequence:
33  * 0110100100001010111011000111110
34  * 0x690AEC76 (padded on right with a zero)
35  *
36  * 63-bit m-sequence:
37  * 101011001101110110100100111000101111001010001100001000001111110
38  * 0xACDDA4E2F28C20FC (padded on right with a zero)
39  * </pre>
40  */
41 
42 static const unsigned long long GRSF_SYNC = 0xacdda4e2f28c20fcULL;
43 
44 static const int GRSF_BITS_PER_BYTE = 8;
45 static const int GRSF_SYNC_OVERHEAD = sizeof(GRSF_SYNC);
46 static const int GRSF_PAYLOAD_OVERHEAD = 1; // 1 byte seqno
47 static const int GRSF_TAIL_PAD = 1; // one byte trailing padding
49 
50 
51 #endif /* INCLUDED_GR_SIMPLE_FRAMER_SYNC_H */