gr::filter::iir_filter_ffd Class Reference

IIR filter with float input, float output and double taps. More...

#include <iir_filter_ffd.h>

Inheritance diagram for gr::filter::iir_filter_ffd:

List of all members.

Public Types
typedef boost::shared_ptr < iir_filter_ffd >	sptr
Public Member Functions
virtual void	set_taps (const std::vector< double > &fftaps, const std::vector< double > &fbtaps)=0
Static Public Member Functions
static sptr	make (const std::vector< double > &fftaps, const std::vector< double > &fbtaps)

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Detailed Description

IIR filter with float input, float output and double taps.

This filter uses the Direct Form I implementation, where fftaps contains the feed-forward taps, and fbtaps the feedback ones.

The input and output satisfy a difference equation of the form \f{ y[n] - \sum_{k=1}^{M} a_k y[n-k] = \sum_{k=0}^{N} b_k x[n-k] \f}

with the corresponding rational system function \f{ H(z) = \ frac{\sum_{k=0}^{M} b_k z^{-k}}{1 - \sum_{k=1}^{N} a_k z^{-k}} \f}

Note that some texts define the system function with a + in the denominator. If you're using that convention, you'll need to negate the feedback taps.

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Member Typedef Documentation

typedef boost::shared_ptr<iir_filter_ffd> gr::filter::iir_filter_ffd::sptr

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Member Function Documentation

static sptr gr::filter::iir_filter_ffd::make	(	const std::vector< double > &	fftaps,
		const std::vector< double > &	fbtaps
	)		[static]

virtual void gr::filter::iir_filter_ffd::set_taps	(	const std::vector< double > &	fftaps,
		const std::vector< double > &	fbtaps
	)		[pure virtual]

Implemented in gr::filter::iir_filter_ffd_impl.

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The documentation for this class was generated from the following file:

• iir_filter_ffd.h