Signal Processing Toolbox™

hamming - Hamming window

Syntax

w = hamming(L)
w = hamming(L,'sflag')

Description

w = hamming(L) returns an L-point symmetric Hamming window in the column vector w. L should be a positive integer. The coefficients of a Hamming window are computed from the following equation.

The window length is .

w = hamming(L,'sflag') returns an L-point Hamming window using the window sampling specified by 'sflag', which can be either 'periodic' or 'symmetric' (the default). The 'periodic' flag is useful for DFT/FFT purposes, such as in spectral analysis. The DFT/FFT contains an implicit periodic extension and the periodic flag enables a signal windowed with a periodic window to have perfect periodic extension. When 'periodic' is specified, hamming computes a length L+1 window and returns the first L points. When using windows for filter design, the 'symmetric' flag should be used.

Note   If you specify a one-point window (L=1), the value 1 is returned.

Examples

Create a 64-point Hamming window and display the result in WVTool:

L=64;
wvtool(hamming(L))

References

[1] Oppenheim, A.V., and R.W. Schafer, Discrete-Time Signal Processing, Prentice-Hall, 1989, pp. 447-448.

See Also

blackman, flattopwin, hann, window, wintool, wvtool

grpdelay

hann