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atsc_fpll.h
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/* -*- c++ -*- */
/*
* Copyright 2014 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifndef INCLUDED_DTV_ATSC_FPLL_H
#define INCLUDED_DTV_ATSC_FPLL_H
#include <gnuradio/dtv/api.h>
#include <gnuradio/sync_block.h>
namespace gr {
namespace dtv {
/*!
* \brief ATSC Receiver FPLL
*
* This block is takes in a complex I/Q baseband stream from the
* receive filter and outputs the 8-level symbol stream.
*
* It does this by first locally generating a pilot tone and
* complex mixing with the input signal. This results in the
* pilot tone shifting to DC and places the signal in the upper
* sideband.
*
* As no information is encoded in the phase of the waveform, the
* Q channel is then discarded, producing a real signal with the
* lower sideband restored.
*
* The 8-level symbol stream still has a DC offset, and still
* requires symbol timing recovery.
*
* \ingroup dtv_atsc
*/
class DTV_API atsc_fpll : virtual public gr::sync_block
{
public:
// gr::dtv::atsc_fpll::sptr
typedef std::shared_ptr<atsc_fpll> sptr;
/*!
* \brief Make a new instance of gr::dtv::atsc_fpll.
*
* param rate Sample rate of incoming stream
*/
static sptr make(float rate);
};
} /* namespace dtv */
} /* namespace gr */
#endif /* INCLUDED_DTV_ATSC_FPLL_H */
gr::dtv::atsc_fpll
ATSC Receiver FPLL.
Definition atsc_fpll.h:41
gr::dtv::atsc_fpll::sptr
std::shared_ptr< atsc_fpll > sptr
Definition atsc_fpll.h:44
gr::dtv::atsc_fpll::make
static sptr make(float rate)
Make a new instance of gr::dtv::atsc_fpll.
gr::sync_block
synchronous 1:1 input to output with history
Definition sync_block.h:26
api.h
DTV_API
#define DTV_API
Definition gr-dtv/include/gnuradio/dtv/api.h:18
gr::dtv
Definition atsc_consts.h:17
gr
GNU Radio logging wrapper.
Definition basic_block.h:29
sync_block.h