GNU Radio 3.6.3 C++ API
gr_pll_freqdet_cf.h
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/* -*- c++ -*- */
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/*
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* Copyright 2004,2011 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_GR_PLL_FREQDET_CF_H
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#define INCLUDED_GR_PLL_FREQDET_CF_H
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#include <
gr_core_api.h
>
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#include <
gr_sync_block.h
>
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#include <
gri_control_loop.h
>
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class
gr_pll_freqdet_cf
;
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typedef
boost::shared_ptr<gr_pll_freqdet_cf>
gr_pll_freqdet_cf_sptr
;
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GR_CORE_API
gr_pll_freqdet_cf_sptr
gr_make_pll_freqdet_cf
(
float
loop_bw,
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float
max_freq,
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float
min_freq);
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/*!
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* \brief Implements a PLL which locks to the input frequency and outputs
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* an estimate of that frequency. Useful for FM Demod.
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* \ingroup sync_blk
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*
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* input: stream of complex; output: stream of floats
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*
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* This PLL locks onto a [possibly noisy] reference carrier on
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* the input and outputs an estimate of that frequency in radians per sample.
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* All settings max_freq and min_freq are in terms of radians per sample,
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* NOT HERTZ. The loop bandwidth determins the lock range and should be set
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* around pi/200 -- 2pi/100.
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* \sa gr_pll_refout_cc, gr_pll_carriertracking_cc
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*/
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class
GR_CORE_API
gr_pll_freqdet_cf
:
public
gr_sync_block
,
public
gri_control_loop
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{
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friend
GR_CORE_API
gr_pll_freqdet_cf_sptr
gr_make_pll_freqdet_cf
(
float
loop_bw,
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float
max_freq,
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float
min_freq);
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float
mod_2pi (
float
in);
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gr_pll_freqdet_cf
(
float
loop_bw,
float
max_freq,
float
min_freq);
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int
work
(
int
noutput_items,
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gr_vector_const_void_star
&input_items,
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gr_vector_void_star
&output_items);
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private
:
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float
phase_detector(
gr_complex
sample,
float
ref_phase);
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};
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#endif
gnuradio
gnuradio-core
src
lib
general
gr_pll_freqdet_cf.h
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