GNU Radio Manual and C++ API Reference
3.9.1.0
The Free & Open Software Radio Ecosystem
mmse_interp_differentiator_ff.h
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/* -*- c++ -*- */
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/*
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* Copyright (C) 2002,2007,2012,2017 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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* SPDX-License-Identifier: GPL-3.0-or-later
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*
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*/
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#ifndef _MMSE_INTERP_DIFFERENTIATOR_FF_H_
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#define _MMSE_INTERP_DIFFERENTIATOR_FF_H_
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#include <
gnuradio/filter/api.h
>
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#include <
gnuradio/filter/fir_filter.h
>
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#include <vector>
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namespace
gr
{
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namespace
filter {
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/*!
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* \brief Compute intermediate samples of the derivative of a signal
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* between signal samples x(k*Ts)
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* \ingroup filter_primitive
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*
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* \details
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* This implements a Minimum Mean Squared Error interpolating
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* differentiator with 8 taps. It is suitable for signals where the
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* derivative of a signal has a bandwidth of interest in the range
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* (-Fs/4, Fs/4), where Fs is the samples rate.
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*
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* Although mu, the fractional delay, is specified as a float, in
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* the range [0.0, 1.0], it is actually quantized. That is, mu is
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* quantized in the differentiate method to 128th's of a sample.
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*
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*/
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class
FILTER_API
mmse_interp_differentiator_ff
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{
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public
:
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mmse_interp_differentiator_ff
();
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mmse_interp_differentiator_ff
(
mmse_interp_differentiator_ff
&&) =
default
;
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unsigned
ntaps()
const
;
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unsigned
nsteps()
const
;
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/*!
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* \brief compute a single interpolated differentiated output value.
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*
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* \p input must have ntaps() valid entries.
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* input[0] .. input[ntaps() - 1] are referenced to compute the output
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* value.
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*
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* \p mu must be in the range [0, 1] and specifies the fractional delay.
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*
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* \throws std::runtime_error if mu is not in the range [0, 1].
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*
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* \returns the interpolated differentiated output value.
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*/
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float
differentiate(
const
float
input[],
float
mu)
const
;
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protected
:
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std::vector<kernel::fir_filter_fff>
filters
;
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};
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}
/* namespace filter */
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}
/* namespace gr */
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#endif
/* _MMSE_INTERP_DIFFERENTIATOR_FF_H_ */
FILTER_API
#define FILTER_API
Definition:
gr-filter/include/gnuradio/filter/api.h:18
api.h
gr::filter::mmse_interp_differentiator_ff
Compute intermediate samples of the derivative of a signal between signal samples x(k*Ts)
Definition:
mmse_interp_differentiator_ff.h:36
fir_filter.h
gr::filter::mmse_interp_differentiator_ff::filters
std::vector< kernel::fir_filter_fff > filters
Definition:
mmse_interp_differentiator_ff.h:61
gr
GNU Radio logging wrapper for log4cpp library (C++ port of log4j)
Definition:
basic_block.h:29
gr-filter
include
gnuradio
filter
mmse_interp_differentiator_ff.h
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