blob: 5dd2b82c3cfbcede366a3fc7d723bb92477e6717 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
/* -*- c++ -*- */
/*
* Copyright 2004,2005,2012 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_SIMPLE_FRAMER_SYNC_H
#define INCLUDED_GR_SIMPLE_FRAMER_SYNC_H
namespace gr {
namespace digital {
/*!
* \brief Here are a couple of maximum length sequences
* (m-sequences) that were generated by the the "mseq"
* matlab/octave code downloaded from: <a
* href="http://www.mathworks.com/matlabcentral/fileexchange/990">http://www.mathworks.com/matlabcentral/fileexchange/990</a>
*
* <pre>
* 31-bit m-sequence:
* 0110100100001010111011000111110
* 0x690AEC76 (padded on right with a zero)
*
* 63-bit m-sequence:
* 101011001101110110100100111000101111001010001100001000001111110
* 0xACDDA4E2F28C20FC (padded on right with a zero)
* </pre>
*/
static const unsigned long long GRSF_SYNC = 0xacdda4e2f28c20fcULL;
static const int GRSF_BITS_PER_BYTE = 8;
static const int GRSF_SYNC_OVERHEAD = sizeof(GRSF_SYNC);
static const int GRSF_PAYLOAD_OVERHEAD = 1; // 1 byte seqno
static const int GRSF_TAIL_PAD = 1; // one byte trailing padding
static const int GRSF_OVERHEAD = GRSF_SYNC_OVERHEAD + GRSF_PAYLOAD_OVERHEAD + GRSF_TAIL_PAD;
} /* namespace digital */
} /* namespace gr */
#endif /* INCLUDED_GR_SIMPLE_FRAMER_SYNC_H */
|
