GNU Radio Radar Toolbox
os_cfar_c.h
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/* -*- c++ -*- */
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/*
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* Copyright 2014 Communications Engineering Lab, KIT.
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*
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* This 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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* This software 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 this software; 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_RADAR_OS_CFAR_C_H
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#define INCLUDED_RADAR_OS_CFAR_C_H
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#include <gnuradio/tagged_stream_block.h>
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#include <
radar/api.h
>
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namespace
gr
{
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namespace
radar {
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/*!
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* \brief This block estimates peaks of a given FFT spectrum as tagged stream. Multi peak
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* detection is implemented with the OS-CFAR algorithm. The algorithm uses around the cell
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* under test (CUT) on each side samp_compare samples to estimate the noise floor. This
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* relative threshold is defined by the bin of the vector within the sorted samp_compare
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* samples. A standard value is rel_threshold = 0.78. The value of this bin is multiplied
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* by mult_threshold and compared with the CUT. samp_protect samples are a protected are
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* which is not used for acquiring compare samples. If consecutive bins are detected as
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* valid peaks it is possible to merge these detections with merge_consecutive = true.
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* Output data are f32vectors with the information of frequency, power and phase. The
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* identifiers (symbols) are 'frequency', 'power' and 'phase'.
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*
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* \param samp_rate Sample rate
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* \param samp_compare Sample to be compared with each other
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* \param samp_protect Samples which are protected and not used for peak detection
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* \param rel_threshold Relative threshold
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* \param mult_threshold Multiplier threshold
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* \param merge_consectuive Toggle merging consecutive detected peaks
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* \param len_key Packet length key for tagged stream
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*
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* \ingroup radar
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*
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*/
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class
RADAR_API
os_cfar_c
:
virtual
public
gr::tagged_stream_block
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{
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public
:
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typedef
boost::shared_ptr<os_cfar_c>
sptr
;
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/*!
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* \brief Return a shared_ptr to a new instance of radar::os_cfar_c.
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*
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* To avoid accidental use of raw pointers, radar::os_cfar_c's
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* constructor is in a private implementation
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* class. radar::os_cfar_c::make is the public interface for
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* creating new instances.
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*/
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static
sptr
make(
int
samp_rate,
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int
samp_compare,
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int
samp_protect,
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float
rel_threshold,
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float
mult_threshold,
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bool
merge_consecutive =
true
,
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const
std::string& len_key =
"packet_len"
);
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virtual
void
set_rel_threshold(
float
inp) = 0;
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virtual
void
set_mult_threshold(
float
inp) = 0;
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virtual
void
set_samp_compare(
int
inp) = 0;
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virtual
void
set_samp_protect(
int
inp) = 0;
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};
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}
// namespace radar
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}
// namespace gr
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#endif
/* INCLUDED_RADAR_OS_CFAR_C_H */
gr::radar::os_cfar_c::sptr
boost::shared_ptr< os_cfar_c > sptr
Definition:
os_cfar_c.h:56
RADAR_API
#define RADAR_API
Definition:
api.h:31
gr::radar::os_cfar_c
This block estimates peaks of a given FFT spectrum as tagged stream. Multi peak detection is implemen...
Definition:
os_cfar_c.h:53
gr
Definition:
crop_matrix_vcvc.h:28
api.h
include
radar
os_cfar_c.h
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