Package Filters

Class FIRArbitraryFilter

java.lang.Object

Filters.FilterMethod

Filters.FIRFilterMethod

Filters.FIRArbitraryFilter

public class FIRArbitraryFilter
extends FIRFilterMethod

Arbitrary response filters. this really doens't fit well into the filterMethod framework since it no longer used a filterParams method, but will try to use as best I can so that these more arbitrary filters can be used within the same framework as other types of filter.

Author:

Doug Gillespie

Field Summary

Fields inherited from class Filters.FIRFilterMethod

filterResponse, filterTaps, NRESPONSEPOINTS

Fields inherited from class Filters.FilterMethod

filterParams

Constructor Summary

Constructors

Constructor	Description
FIRArbitraryFilter(double sampleRate, FilterParams filterParams)

Method Summary

Modifier and Type	Method	Description
int	calculateFilter()
double	getFilterPhase(double omega)	Get the filter phase at an angular frequency (o invalid input: '<' omega invalid input: '<' pi).
void	setResponse(double[] frequency, double[] gain, int logFilterOrder, double windowGamma)	Set the filter response.

Methods inherited from class Filters.FIRFilterMethod

createFilter, getFilterGain, getFilterGainConstant, getFilterTaps

Methods inherited from class Filters.FilterMethod

createFilterMethod, getFastFilterCoefficients, getFilterParams, getSampleRate, setFilterParams, setSampleRate

Methods inherited from class java.lang.Object

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

Constructor Details

FIRArbitraryFilter

public FIRArbitraryFilter(double sampleRate,
 FilterParams filterParams)

Method Details

setResponse

public void setResponse(double[] frequency,
 double[] gain,
 int logFilterOrder,
 double windowGamma)

Set the filter response. The first and last frequency points should correspond to the 0 and the niquist frequency

Parameters:

frequency - array of frequency values.

gain - array of gain values.

filterOrder - must be an exact power of 2

calculateFilter

public int calculateFilter()

getFilterPhase

public double getFilterPhase(double omega)

Description copied from class: FilterMethod

Get the filter phase at an angular frequency (o invalid input: '<' omega invalid input: '<' pi).

Overrides:

getFilterPhase in class FIRFilterMethod

Parameters:

omega - angular frequency

Returns:

phase