GNU Radio Manual and C++ API Reference  3.7.9.2
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GrAtscSegSymSyncImpl.h
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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 _GRATSCSEGSYMSYNCIMPL_H_
23 #define _GRATSCSEGSYMSYNCIMPL_H_
24 
25 #include <GrAtscSegSymSync.h>
27 
28 
29 /*!
30  * \brief concrete implementation of GrAtscSegSymSync
31  *
32  * This class implements data segment sync tracking and symbol timing
33  * using a variation of the method described in
34  * "ATSC/VSB Tutorial - Receiver Technology" by Wayne E. Bretl of
35  * Zenith, pgs 41-45.
36  */
37 
39 
40  atsci_sssr d_sssr;
41  atsci_interpolator d_interp;
42  VrSampleIndex d_next_input;
43  double d_rx_clock_to_symbol_freq; // nominal ratio
44 
45 public:
46 
47  // the standard methods...
48 
49  GrAtscSegSymSyncImpl (double nominal_ratio_of_rx_clock_to_symbol_freq);
50  virtual ~GrAtscSegSymSyncImpl ();
51 
52  virtual const char *name () { return "GrAtscSegSymSyncImpl"; }
53 
54  virtual int forecast (VrSampleRange output,
55  VrSampleRange inputs[]);
56 
57  virtual int work (VrSampleRange output, void *o[],
58  VrSampleRange inputs[], void *i[]);
59 
60  void pre_initialize ();
61 
62 
63  // reset on channel change
64 
65  virtual void reset ();
66 
67 };
68 
69 #endif /* _GRATSCSEGSYMSYNCIMPL_H_ */
virtual ~GrAtscSegSymSyncImpl()
virtual const char * name()
Definition: GrAtscSegSymSyncImpl.h:52
virtual int work(VrSampleRange output, void *o[], VrSampleRange inputs[], void *i[])
concrete implementation of GrAtscSegSymSync
Definition: GrAtscSegSymSyncImpl.h:38
ATSC Segment and Symbol Sync Recovery.
Definition: sssr_impl.h:132
GrAtscSegSymSyncImpl(double nominal_ratio_of_rx_clock_to_symbol_freq)
virtual int forecast(VrSampleRange output, VrSampleRange inputs[])
interpolator control for segment and symbol sync recovery
Definition: sssr_impl.h:197
virtual void reset()
reset bit timing loop on channel change
ATSC SegSymSync.
Definition: GrAtscSegSymSync.h:45