#include <DigitalFilter.h>

Public Member Functions
	IIRFilter (size_t order, const double acoeffs, const double bcoeffs)

	IIRFilter (std::complex< double > gain, size_t nzeroes, const std::complex< double > digiZeroes, size_t npoles, const std::complex< double > digiPoles)

	IIRFilter (const FIRFilter &fir)

virtual void	filterOut (size_t n, const double w, double out) const

virtual std::complex< double >	transfer (std::complex< double > z) const

size_t	getOrder () const

size_t	nAcoeffs () const

size_t	nBcoeffs () const

virtual size_t	nDigiPoles () const

virtual size_t	nDigiZeroes () const

virtual const std::complex< double > *	getDigiPoles () const

virtual const std::complex< double > *	getDigiZeroes () const

std::complex< double >	getDigiGain () const

TString	asString () const

virtual void	Draw (const char *opt="", int color=1) const

Public Member Functions inherited from FFTtools::DigitalFilter
virtual double *	filter (size_t n, const double *w) const

virtual void	filterGraph (TGraph *g, bool filterErrors=false) const

virtual void	filterReplace (size_t n, double *w) const

virtual void	impulse (size_t n, double *out, size_t delay=0) const

virtual double *	impulse (size_t n, size_t delay=0) const

TGraph *	impulseGraph (size_t n=101, double dt=1, size_t delay=50) const

virtual void	response (size_t n, TGraph amplitude_response, TGraph phase_response, TGraph **group_delay=0) const

virtual TGraph *	amplitudeResponse (size_t n=101) const

virtual TGraph *	phaseResponse (size_t n=101) const

virtual TGraph *	groupDelay (size_t n=101) const

double	avgDelay (double min_freq=0, double max_freq=1, int n=101) const

virtual TPad *	drawResponse (TPad *c=0, int n=101, int delay=50) const

Protected Member Functions
void	computePolesAndZeroes ()

void	computeCoeffsFromDigiPoles ()

Protected Attributes
size_t	order

std::vector< double >	acoeffs

std::vector< double >	bcoeffs

std::complex< double >	digi_gain

std::vector< std::complex< double > >	digi_poles

std::vector< std::complex< double > >	digi_zeroes

TGraph *	gzero

TGraph *	gpole

Detailed Description

IIR filter implementation

An IIR Filter is a rational function of z^-1 (which, of course, is e^(-jw), the unit delay) )

     b0 + b1 z^-1 + b2 z^-2 + ...

H(z) = ----------------------------— a0 + a1 z^-1 + a2 z^-2 + ...

a0 is typically 1 (otherwise b0 and a0 are degenerate), but this isn't enforced.

Definition at line 255 of file DigitalFilter.h.

Inheritance diagram for FFTtools::IIRFilter:

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Collaboration diagram for FFTtools::IIRFilter:

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Constructor & Destructor Documentation

FFTtools::IIRFilter::IIRFilter	(	std::complex< double >	gain,
		size_t	nzeroes,
		const std::complex< double > *	digiZeroes,
		size_t	npoles,
		const std::complex< double > *	digiPoles
	)

inline

initialize filter from digital zeroes/poles/gain

Definition at line 264 of file DigitalFilter.h.

FFTtools::IIRFilter::IIRFilter ( const FIRFilter & fir )

initialize filter from an FIR filter. If the FIR filter has a large delay, this might end up having quite a large order

Definition at line 702 of file DigitalFilter.cxx.

Member Function Documentation

void FFTtools::IIRFilter::Draw	(	const char *	opt = `""`,
		int	color = `1`
	)		const

virtual

Draw pole zero diagram

Allowed options: same - draw on top circ - draw unit circle pol - draw polar axis

Definition at line 740 of file DigitalFilter.cxx.

void FFTtools::IIRFilter::filterOut	(	size_t	n,
		const double *	w,
		double *	out
	)		const

virtual

Filter input with previously allocated output.

Parameters

n	size of waveform to filter
w	input waveform
out	output waveform (assumed to be allocated)

Implements FFTtools::DigitalFilter.

Definition at line 549 of file DigitalFilter.cxx.

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

components/libRootFftwWrapper/include/DigitalFilter.h
components/libRootFftwWrapper/src/DigitalFilter.cxx

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation