GNU Radio v3.7.0-113-g523a53ac C++ API
single_pole_iir_filter_cc.h
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/* -*- c++ -*- */
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/*
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* Copyright 2004-2006,2012 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_SINGLE_POLE_IIR_FILTER_CC_H
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#define INCLUDED_SINGLE_POLE_IIR_FILTER_CC_H
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#include <
gnuradio/filter/api.h
>
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#include <
gnuradio/filter/single_pole_iir.h
>
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#include <
gnuradio/sync_block.h
>
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#include <
gnuradio/gr_complex.h
>
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namespace
gr {
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namespace
filter {
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/*!
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* \brief single pole IIR filter with complex input, complex output
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* \ingroup filter_blk
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*
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* \details
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* The input and output satisfy a difference equation of the form
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\htmlonly
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\f{
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y[n] - (1-alpha) y[n-1] = alpha x[n]
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\f}
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\endhtmlonly
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\xmlonly
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y[n] - (1-alpha) y[n-1] = alpha x[n]
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\endxmlonly
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* with the corresponding rational system function
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\htmlonly
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\f{
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H(z) = \frac{alpha}{1 - (1-alpha) z^{-1}}
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\f}
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\endhtmlonly
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\xmlonly
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H(z) = \ frac{alpha}{1 - (1-alpha) z^{-1}}
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\endxmlonly
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* Note that some texts define the system function with a + in the
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* denominator. If you're using that convention, you'll need to
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* negate the feedback tap.
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*/
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class
FILTER_API
single_pole_iir_filter_cc
:
virtual
public
sync_block
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{
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public
:
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// gr::filter::single_pole_iir_filter_cc::sptr
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typedef
boost::shared_ptr<single_pole_iir_filter_cc>
sptr
;
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static
sptr
make(
double
alpha,
unsigned
int
vlen=1);
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virtual
void
set_taps(
double
alpha) = 0;
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};
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}
/* namespace filter */
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}
/* namespace gr */
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#endif
/* INCLUDED_SINGLE_POLE_IIR_FILTER_CC_H */
gnuradio
gr-filter
include
gnuradio
filter
single_pole_iir_filter_cc.h
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