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added low pass filter

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This commit is contained in:
Ahmet Inan 2024-04-22 14:58:41 +02:00
parent 5d92cb4b29
commit 9e84f1cd8f
1 changed files with 22 additions and 0 deletions
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app/src/main/java/xdsopl/robot36/Filter.java Normal file
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/*
FIR Filter
Copyright 2024 Ahmet Inan <xdsopl@gmail.com>
*/
package xdsopl.robot36;
public final class Filter {
public static double sinc(double x) {
if (x == 0)
return 1;
x *= Math.PI;
return Math.sin(x) / x;
}
public static double lowPass(double cutoff, int n, int N) {
double f = 2 * cutoff;
double x = n - (N - 1) / 2.0;
return f * sinc(f * x);
}
}