19 lines
658 B
C#
19 lines
658 B
C#
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namespace FftSharp.Windows
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{
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public class Welch : Window, IWindow
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{
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public override string Name => "Welch";
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public override string Description =>
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"The Welch window is typically used for antialiasing and resampling. " +
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"Its frequency response is better than that of the Bartlett windowed cosc function below pi, " +
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"but it shows again a rather distinctive bump above.";
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protected override double windowValue(int index, int size)
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{
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double halfN = (size - 1) / 2.0;
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double b = (index - halfN) / halfN;
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return 1 - b * b;
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}
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}
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}
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