hmi.math.digitalfilter
Class Butterworth

java.lang.Object
  hmi.math.digitalfilter.Butterworth

public final class Butterworth
extends Object

Butterworth digital low-pass filter

Author:

Herwin van Welbergen

Constructor Summary

private

Butterworth()

Method Summary

static void	butterworth(float[] fin, float fc, float fs, int pass, float[] fout) Butterworth-filters the data
static void	butterworth(float[] fin, float fc, float fs, int pass, int width, float[] fout) Butterworth-filters the data, assumes the input is aligned in blocks of width floats

Methods inherited from class java.lang.Object

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

Constructor Detail

Butterworth

private Butterworth()

Method Detail

butterworth

public static void butterworth(float[] fin,
                               float fc,
                               float fs,
                               int pass,
                               float[] fout)

Butterworth-filters the data

Parameters:

fin - input data

fc - cutt-off frequency

fs - sample frequency

pass - pass nr

fout - output data

butterworth

public static void butterworth(float[] fin,
                               float fc,
                               float fs,
                               int pass,
                               int width,
                               float[] fout)

Butterworth-filters the data, assumes the input is aligned in blocks of width floats

Parameters:

fin - input data

fc - cutt-off frequency

fs - sample frequency

pass - pass nr

width - block sizes

fout - output data