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mmse_interp_differentiator_cc.h
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/* -*- c++ -*- */
/*
* Copyright (C) 2002,2007,2012,2017 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifndef _MMSE_INTERP_DIFFERENTIATOR_CC_H_
#define _MMSE_INTERP_DIFFERENTIATOR_CC_H_
#include <gnuradio/filter/api.h>
#include <gnuradio/filter/fir_filter.h>
#include <gnuradio/gr_complex.h>
#include <vector>
namespace gr {
namespace filter {
/*!
* \brief Compute intermediate samples of the derivative of a signal
* between signal samples x(k*Ts)
* \ingroup filter_primitive
*
* \details
* This implements a Minimum Mean Squared Error interpolating
* differentiator with 8 taps. It is suitable for signals where the
* derivative of a signal has a bandwidth of interest in the range
* (-Fs/4, Fs/4), where Fs is the samples rate.
*
* Although mu, the fractional delay, is specified as a float, in
* the range [0.0, 1.0], it is actually quantized. That is, mu is
* quantized in the differentiate method to 128th's of a sample.
*
*/
class FILTER_API mmse_interp_differentiator_cc
{
public:
mmse_interp_differentiator_cc();
mmse_interp_differentiator_cc(mmse_interp_differentiator_cc&&) = default;
unsigned ntaps() const;
unsigned nsteps() const;
/*!
* \brief compute a single interpolated differentiated output value.
*
* \p input must have ntaps() valid entries.
* input[0] .. input[ntaps() - 1] are referenced to compute the output
* value.
*
* \p mu must be in the range [0, 1] and specifies the fractional delay.
*
* \throws std::runtime_error if mu is not in the range [0, 1].
*
* \returns the interpolated differentiated output value.
*/
gr_complex differentiate(const gr_complex input[], float mu) const;
protected:
std::vector<kernel::fir_filter_ccf> filters;
};
} /* namespace filter */
} /* namespace gr */
#endif /* _MMSE_INTERP_DIFFERENTIATOR_CC_H_ */
gr::filter::mmse_interp_differentiator_cc::ntaps
unsigned ntaps() const
gr::filter::mmse_interp_differentiator_cc::mmse_interp_differentiator_cc
mmse_interp_differentiator_cc(mmse_interp_differentiator_cc &&)=default
gr::filter::mmse_interp_differentiator_cc::mmse_interp_differentiator_cc
mmse_interp_differentiator_cc()
gr::filter::mmse_interp_differentiator_cc::nsteps
unsigned nsteps() const
gr::filter::mmse_interp_differentiator_cc::filters
std::vector< kernel::fir_filter_ccf > filters
Definition mmse_interp_differentiator_cc.h:62
gr::filter::mmse_interp_differentiator_cc::differentiate
gr_complex differentiate(const gr_complex input[], float mu) const
compute a single interpolated differentiated output value.
fir_filter.h
api.h
FILTER_API
#define FILTER_API
Definition gr-filter/include/gnuradio/filter/api.h:18
gr_complex.h
gr_complex
std::complex< float > gr_complex
Definition gr_complex.h:15
gr::filter
Definition dc_blocker_cc.h:18
gr
GNU Radio logging wrapper.
Definition basic_block.h:29