Filters
Class FilterMethod

java.lang.Object
  Filters.FilterMethod

Direct Known Subclasses:

ButterworthFilter, ChebyshevFilter

public abstract class FilterMethod
extends java.lang.Object

Author:

Doug Gillespie

Superclass used by various filter types to calculate poles and zeros, gains, etc.

Field Summary

protected FilterParams	filterParams
protected double	omega1
protected double	omega2
protected double	omega3
protected Complex[]	poles
private double	sampleRate
protected Complex[]	zeros
protected double	zeroValue

Constructor Summary

FilterMethod(double sampleRate)

Method Summary

void	calculateOmegaValues()
(package private) abstract int	calculatePoleZeros()
(package private) int	doBandpassTransformation(Complex[] poles, Complex[] zeros, int nPoints)
(package private) int	doBandStopTransformation(Complex[] poles, Complex[] zeros, int nPoints)
(package private) abstract java.lang.String	filterName()
(package private) double	getFilterGain(double omega)
(package private) double	getFilterGainConstant()
(package private) double	getFilterPhase(double omega)
private Complex	getFirstBit(Complex z, double A)
Complex[]	getPoles(FilterParams filterParams)
double	getSampleRate()
private Complex	getSecondBit(Complex z, double A)
Complex[]	getZeros(FilterParams filterParams)
(package private) double	mPiTerm(int m)
int	poleZeroCount()
void	setSampleRate(double sampleRate)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

poles

protected Complex[] poles

zeros

protected Complex[] zeros

filterParams

protected FilterParams filterParams

sampleRate

private double sampleRate

omega1

protected double omega1

omega2

protected double omega2

omega3

protected double omega3

zeroValue

protected double zeroValue

Constructor Detail

FilterMethod

public FilterMethod(double sampleRate)

Method Detail

filterName

abstract java.lang.String filterName()

calculatePoleZeros

abstract int calculatePoleZeros()

getPoles

public Complex[] getPoles(FilterParams filterParams)

getZeros

public Complex[] getZeros(FilterParams filterParams)

poleZeroCount

public int poleZeroCount()

calculateOmegaValues

public void calculateOmegaValues()

mPiTerm

double mPiTerm(int m)

doBandpassTransformation

int doBandpassTransformation(Complex[] poles,
                             Complex[] zeros,
                             int nPoints)

doBandStopTransformation

int doBandStopTransformation(Complex[] poles,
                             Complex[] zeros,
                             int nPoints)

getFirstBit

private Complex getFirstBit(Complex z,
                            double A)

getSecondBit

private Complex getSecondBit(Complex z,
                             double A)

getFilterGain

double getFilterGain(double omega)

getFilterPhase

double getFilterPhase(double omega)

getFilterGainConstant

double getFilterGainConstant()

getSampleRate

public double getSampleRate()

setSampleRate

public void setSampleRate(double sampleRate)