GNU Radio 3.6.3.1 C++ API
gr_peak_detector2_fb.h
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/* -*- c++ -*- */
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/*
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* Copyright 2007 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_peak_detector2_FB_H
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#define INCLUDED_gr_peak_detector2_FB_H
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#include <
gr_core_api.h
>
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#include <
gr_sync_block.h
>
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class
gr_peak_detector2_fb
;
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typedef
boost::shared_ptr<gr_peak_detector2_fb>
gr_peak_detector2_fb_sptr
;
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GR_CORE_API
gr_peak_detector2_fb_sptr
gr_make_peak_detector2_fb
(
float
threshold_factor_rise
= 7,
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int
look_ahead
= 1000,
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float
alpha
= 0.001);
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/*!
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* \brief Detect the peak of a signal
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* \ingroup level_blk
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*
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* If a peak is detected, this block outputs a 1,
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* or it outputs 0's. A separate debug output may be connected, to
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* view the internal EWMA described below.
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*
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* \param threshold_factor_rise The threshold factor determins when a peak
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* is present. An EWMA average of the signal is calculated and when the
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* value of the signal goes over threshold_factor_rise*average, we
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* call the peak.
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* \param look_ahead The look-ahead value is used when the threshold is
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* found to locate the peak within this range.
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* \param alpha The gain value of a single-pole moving average filter
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*/
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class
GR_CORE_API
gr_peak_detector2_fb
:
public
gr_sync_block
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{
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friend
GR_CORE_API
gr_peak_detector2_fb_sptr
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gr_make_peak_detector2_fb
(
float
threshold_factor_rise,
int
look_ahead,
float
alpha);
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gr_peak_detector2_fb
(
float
threshold_factor_rise,
int
look_ahead,
float
alpha);
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private
:
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float
d_threshold_factor_rise;
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int
d_look_ahead;
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int
d_look_ahead_remaining;
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int
d_peak_ind;
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float
d_peak_val;
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float
d_alpha;
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float
d_avg;
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bool
d_found;
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public
:
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/*! \brief Set the threshold factor value for the rise time
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* \param thr new threshold factor
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*/
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void
set_threshold_factor_rise
(
float
thr) { d_threshold_factor_rise = thr; }
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/*! \brief Set the look-ahead factor
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* \param look new look-ahead factor
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*/
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void
set_look_ahead
(
int
look) { d_look_ahead = look; }
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/*! \brief Set the running average alpha
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* \param alpha new alpha for running average
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*/
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void
set_alpha
(
int
alpha) { d_alpha = alpha; }
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/*! \brief Get the threshold factor value for the rise time
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* \return threshold factor
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*/
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float
threshold_factor_rise
() {
return
d_threshold_factor_rise; }
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/*! \brief Get the look-ahead factor value
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* \return look-ahead factor
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*/
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int
look_ahead
() {
return
d_look_ahead; }
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/*! \brief Get the alpha value of the running average
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* \return alpha
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*/
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float
alpha
() {
return
d_alpha; }
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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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};
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#endif
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gnuradio
gnuradio-core
src
lib
general
gr_peak_detector2_fb.h
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