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

Create a 64-point Blackman window and display the result using WVTool:

• N=64;
  wvtool(blackman(N))
  
  
  

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.

See Also

flattopwin, hamming, hann, window, wintool, wvtool

References

[1] Oppenheim, A.V., and R.W. Schafer. Discrete-Time Signal Processing. Upper Saddle River, NJ: Prentice-Hall, 1999, pp. 468-471.

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