KsrWin

Advanced Analysis Library Only

AnalysisLibErrType KsrWin (double arrayX[], int numberOfElements, double beta);

Purpose

Applies a Kaiser window to the input signal. The following formula defines the Kaiser window:

for i = 0, 1, . . ., n — 1

where
Io = the zeroth–order modified Bessel function of the first kind

KsrWin obtains the output signal using the following formula:

xi = xi × wi

for i = 0, 1, . . ., n — 1

KsrWin performs the window operation in place; that is, the windowed data replaces the input data.

Parameters

Input
Name Type Description
numberOfElements integer Number of elements in the input array, arrayX.
beta double-precision Shape used in the Kaiser window function. A larger beta results a narrower window.

beta Window
0.00 Rectangular
1.33 Triangle
3.86 Hanning
4.86 (Default) Hamming
7.04 Blackman

For more information, refer to Discrete-Time Signal Processing by Oppenheim and Schafer, cited in the Bibliography.
Output
Name Type Description
arrayX double-precision array On input, the input signal.

On output, the signal smoothed by the Kaiser window.

Return Value

Name Type Description
status AnalysisLibErrType A value that specifies the type of error that occurred. Refer to analysis.h for definitions of these constants.