Hanning Routines

Summary

Hanning window.

Declaration

Function Hanning(Src: TVec; WindowMode: TSignalWindowMode; Index: integer; Len: integer): TVec;

Description

Applies Hanning window to Src. Window functions are applied to the signal prior to conversion to frequency domain with the FFT algorithm, to reduce the spectral leakage. Their side-effect is a lower frequency resolution. Hanning window is very widely used and sufficient for most applications. The equation for the Hanning window can be found in [1] p. 249:


    w[i] = 0.5*(1-cos(2*Pi*i/(n-1))

    0 < i < n-1

Categories

Time window functions

See Also
[1] "Digital signal processing, Vinay K. Ingle and John G. Proakis, Brooks-Cole, 2000".
CosineTappered
Kaiser
SignalWindow
Hamming

Declaration

Function Hanning(Src: TVec; WindowMode: TSignalWindowMode): TVec;