GNU Radio Manual and C++ API Reference  3.7.9.2
The Free & Open Software Radio Ecosystem
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Modules Pages
sync_tag_impl.h
Go to the documentation of this file.
1 /* -*- c++ -*- */
2 /*
3  * Copyright 2002 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 #ifndef _ATSC_SYNC_TAG_H_
23 #define _ATSC_SYNC_TAG_H_
24 
25 /*
26  * Constants used to communicate in the second stream passed between
27  * GrAtscFSCorrelator, GrAtscEqualizer and GrAtscFieldSyncMux. The
28  * second stream is sample-for-sample parallel with the streaming
29  * floating point in the first stream. The second stream provides
30  * information about alignment boundaries.
31  *
32  * These are in floating point because the current implementation
33  * requires that for a given module, all input streams share the same
34  * type and all output streams share the same type. We'd use unsigned
35  * char otherwise.
36  */
37 
38 namespace atsc_sync_tag {
39 
40  // Nothing special
41  static const float NORMAL = 0.0;
42 
43  // The corresponding symbol is the first symbol of the
44  // data segment sync sequence { +5, -5, -5, +5 }
45  static const float START_SEG_SYNC = 1.0;
46 
47  // The corresponding symbol is the first symbol of the
48  // field sync 1 PN511 pattern.
49  static const float START_FIELD_SYNC_1 = 2.0;
50 
51  // The corresponding symbol is the first symbol of the
52  // field sync 2 PN511 pattern.
53  static const float START_FIELD_SYNC_2 = 3.0;
54 };
55 
56 #endif /* _ATSC_SYNC_TAG_H_ */
Definition: sync_tag_impl.h:38
static const float START_FIELD_SYNC_1
Definition: sync_tag_impl.h:49
static const float NORMAL
Definition: sync_tag_impl.h:41
static const float START_FIELD_SYNC_2
Definition: sync_tag_impl.h:53
static const float START_SEG_SYNC
Definition: sync_tag_impl.h:45