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atsc_fpll.h
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/* -*- c++ -*- */
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/*
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* Copyright 2014 Free Software Foundation, Inc.
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*
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* This file is part of GNU Radio
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*
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* GNU Radio is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* GNU Radio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Radio; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef INCLUDED_DTV_ATSC_FPLL_H
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#define INCLUDED_DTV_ATSC_FPLL_H
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#include <
gnuradio/dtv/api.h
>
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#include <
gnuradio/sync_block.h
>
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namespace
gr {
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namespace
dtv {
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/*!
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* \brief ATSC Receiver FPLL
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*
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* This block is takes in a complex I/Q baseband stream from the
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* receive filter and outputs the 8-level symbol stream.
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*
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* It does this by first locally generating a pilot tone and
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* complex mixing with the input signal. This results in the
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* pilot tone shifting to DC and places the signal in the upper
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* sideband.
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*
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* As no information is encoded in the phase of the waveform, the
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* Q channel is then discarded, producing a real signal with the
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* lower sideband restored.
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*
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* The 8-level symbol stream still has a DC offset, and still
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* requires symbol timing recovery.
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*
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* \ingroup dtv_atsc
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*/
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class
DTV_API
atsc_fpll
:
virtual
public
gr::sync_block
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{
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public
:
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// gr::dtv::atsc_fpll::sptr
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typedef
boost::shared_ptr<atsc_fpll>
sptr
;
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/*!
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* \brief Make a new instance of gr::dtv::atsc_fpll.
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*
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* param rate Sample rate of incoming stream
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*/
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static
sptr
make(
float
rate);
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};
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}
/* namespace dtv */
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}
/* namespace gr */
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#endif
/* INCLUDED_DTV_ATSC_FPLL_H */
gr-dtv
include
gnuradio
dtv
atsc_fpll.h
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