Package de.gsi.math.filter.iir

Class ChebyshevI

java.lang.Object

de.gsi.math.filter.iir.Cascade

de.gsi.math.filter.iir.ChebyshevI

public class ChebyshevI
extends Cascade

User facing class which contains all the methods the user uses to create ChebyshevI filters. This done in this way: ChebyshevI chebyshevI = new ChebyshevI(); Then call one of the methods below to create low-,high-,band-, or stop-band filters. For example: chebyshevI.bandPass(2,250,50,5,0.5);

Constructor Summary

Constructors

Constructor	Description
ChebyshevI()

Method Summary

Modifier and Type	Method	Description
void	bandPass(int order, double sampleRate, double centerFrequency, double widthFrequency, double rippleDb)	Bandpass filter with default topology
void	bandPass(int order, double sampleRate, double centerFrequency, double widthFrequency, double rippleDb, int directFormType)	Bandpass filter with custom topology
void	bandStop(int order, double sampleRate, double centerFrequency, double widthFrequency, double rippleDb)	Band-stop filter with default topology
void	bandStop(int order, double sampleRate, double centerFrequency, double widthFrequency, double rippleDb, int directFormType)	Band-stop filter with custom topology
void	highPass(int order, double sampleRate, double cutoffFrequency, double rippleDb)	ChebyshevI High-pass filter with default topology
void	highPass(int order, double sampleRate, double cutoffFrequency, double rippleDb, int directFormType)	ChebyshevI Low-pass filter and custom filter topology
void	lowPass(int order, double sampleRate, double cutoffFrequency, double rippleDb)	ChebyshevI Low-pass filter with default topology
void	lowPass(int order, double sampleRate, double cutoffFrequency, double rippleDb, int directFormType)	ChebyshevI Low-pass filter with custom topology

Methods inherited from class de.gsi.math.filter.iir.Cascade

applyScale, filter, getBiquad, getNumBiquads, reset, response, setLayout

Methods inherited from class java.lang.Object

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

Constructor Detail

ChebyshevI

public ChebyshevI()

Method Detail

bandPass

public void bandPass(int order,
                     double sampleRate,
                     double centerFrequency,
                     double widthFrequency,
                     double rippleDb)

Bandpass filter with default topology

Parameters:

order - Filter order

sampleRate - sampling rate

centerFrequency - center frequency

widthFrequency - width of the notch

rippleDb - pass-band ripple in decibel sensible value: 1dB

bandPass

public void bandPass(int order,
                     double sampleRate,
                     double centerFrequency,
                     double widthFrequency,
                     double rippleDb,
                     int directFormType)

Bandpass filter with custom topology

Parameters:

order - Filter order

sampleRate - Sampling rate

centerFrequency - center frequency

widthFrequency - width of the notch

rippleDb - pass-band ripple in decibel sensible value: 1dB

directFormType - The filter topology (see DirectFormAbstract)

bandStop

public void bandStop(int order,
                     double sampleRate,
                     double centerFrequency,
                     double widthFrequency,
                     double rippleDb)

Band-stop filter with default topology

Parameters:

order - Filter order (actual order is twice)

sampleRate - sampling rate of the system

centerFrequency - centre frequency

widthFrequency - Width of the notch

rippleDb - pass-band ripple in decibel sensible value: 1dB

bandStop

public void bandStop(int order,
                     double sampleRate,
                     double centerFrequency,
                     double widthFrequency,
                     double rippleDb,
                     int directFormType)

Band-stop filter with custom topology

Parameters:

order - Filter order (actual order is twice)

sampleRate - Sampling rate of the system

centerFrequency - centre frequency

widthFrequency - Width of the notch

rippleDb - pass-band ripple in decibel sensible value: 1dB

directFormType - the filter topology

highPass

public void highPass(int order,
                     double sampleRate,
                     double cutoffFrequency,
                     double rippleDb)

ChebyshevI High-pass filter with default topology

Parameters:

order - The order of the filter

sampleRate - The sampling rate of the system

cutoffFrequency - the cutoff frequency

rippleDb - passband ripple in decibel sensible value: 1dB

highPass

public void highPass(int order,
                     double sampleRate,
                     double cutoffFrequency,
                     double rippleDb,
                     int directFormType)

ChebyshevI Low-pass filter and custom filter topology

Parameters:

order - The order of the filter

sampleRate - The sampling rate of the system

cutoffFrequency - The cutoff frequency

rippleDb - pass-band ripple in decibel sensible value: 1dB

directFormType - The filter topology. This is either DirectFormAbstract.DIRECT_FORM_I or DIRECT_FORM_II

lowPass

public void lowPass(int order,
                    double sampleRate,
                    double cutoffFrequency,
                    double rippleDb)

ChebyshevI Low-pass filter with default topology

Parameters:

order - The order of the filter

sampleRate - The sampling rate of the system

cutoffFrequency - the cutoff frequency

rippleDb - pass.band ripple in decibel sensible value: 1dB

lowPass

public void lowPass(int order,
                    double sampleRate,
                    double cutoffFrequency,
                    double rippleDb,
                    int directFormType)

ChebyshevI Low-pass filter with custom topology

Parameters:

order - The order of the filter

sampleRate - The sampling rate of the system

cutoffFrequency - The cutoff frequency

rippleDb - pass-band ripple in decibel sensible value: 1dB

directFormType - The filter topology. This is either DirectFormAbstract.DIRECT_FORM_I or DIRECT_FORM_II