Signal Processing Toolbox

blackman

Compute a Blackman window.

Syntax

w = blackman(n)
w = blackman(n,'sflag')

Description

w = blackman(n) returns the n-point symmetric Blackman window in the column vector w, where n is a positive integer.

w = blackman(n,'sflag') returns an n-point Blackman window using the window sampling specified by 'sflag', which can be either 'periodic' or 'symmetric' (the default). When 'periodic' is specified, blackman computes a length n+1 window and returns the first n points.

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

Algorithm

The equation for computing the coefficients of a Blackman window is

Blackman windows have slightly wider central lobes and less sideband leakage than equivalent length Hamming and Hann windows.

Examples

w = blackman(64);
plot(w)
title('Blackman Window')

See Also

bartlett	Compute a Bartlett window.
boxcar	Compute a rectangular window.
chebwin	Compute a Chebyshev window.
hamming	Compute a Hamming window.
hann	Compute a Hann window.
kaiser	Compute a Kaiser window.
triang	Compute a triangular window.

References

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

bilinear

boxcar