GNU Radio Manual and C++ API Reference 3.7.14.0
The Free & Open Software Radio Ecosystem
atsc_fpll.h
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1/* -*- c++ -*- */
2/*
3 * Copyright 2014 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_DTV_ATSC_FPLL_H
24#define INCLUDED_DTV_ATSC_FPLL_H
25
26#include <gnuradio/dtv/api.h>
27#include <gnuradio/sync_block.h>
28
29namespace gr {
30namespace dtv {
31
32/*!
33 * \brief ATSC Receiver FPLL
34 *
35 * This block is takes in a complex I/Q baseband stream from the
36 * receive filter and outputs the 8-level symbol stream.
37 *
38 * It does this by first locally generating a pilot tone and
39 * complex mixing with the input signal. This results in the
40 * pilot tone shifting to DC and places the signal in the upper
41 * sideband.
42 *
43 * As no information is encoded in the phase of the waveform, the
44 * Q channel is then discarded, producing a real signal with the
45 * lower sideband restored.
46 *
47 * The 8-level symbol stream still has a DC offset, and still
48 * requires symbol timing recovery.
49 *
50 * \ingroup dtv_atsc
51 */
52class DTV_API atsc_fpll : virtual public gr::sync_block
53{
54public:
55 // gr::dtv::atsc_fpll::sptr
56 typedef boost::shared_ptr<atsc_fpll> sptr;
57
58 /*!
59 * \brief Make a new instance of gr::dtv::atsc_fpll.
60 *
61 * param rate Sample rate of incoming stream
62 */
63 static sptr make(float rate);
64};
65
66} /* namespace dtv */
67} /* namespace gr */
68
69#endif /* INCLUDED_DTV_ATSC_FPLL_H */
ATSC Receiver FPLL.
Definition: atsc_fpll.h:53
boost::shared_ptr< atsc_fpll > sptr
Definition: atsc_fpll.h:56
static sptr make(float rate)
Make a new instance of gr::dtv::atsc_fpll.
synchronous 1:1 input to output with history
Definition: sync_block.h:38
#define DTV_API
Definition: gr-dtv/include/gnuradio/dtv/api.h:30
Include this header to use the message passing features.
Definition: basic_block.h:45