w = chebwin(L,r)
w = chebwin(L,r) returns the
w containing the length
window whose Fourier transform sidelobe magnitude is
r dB below the mainlobe magnitude. The default value for
If you specify a one-point window (set
1 is returned.
Create a 64-point Chebyshev window with 100 dB of sidelobe attenuation. Display the result using
L = 64; bw = chebwin(L); wvtool(bw)
An artifact of the equiripple design method used in
the presence of impulses at the endpoints of the time-domain response.
This is due to the constant-level sidelobes in the frequency domain.
The magnitude of the impulses are on the order of the size of the
spectral sidelobes. If the sidelobes are large, the effect at the
endpoints may be significant. For more information on this effect,
The equivalent noise bandwidth of a Chebyshev window does not grow monotonically with increasing sidelobe attenuation when the attenuation is smaller than about 45 dB. For spectral analysis, use larger sidelobe attenuation values, or, if you need to work with small attenuations, use a Kaiser window.
 Digital Signal Processing Committee of the IEEE Acoustics, Speech, and Signal Processing Society, eds. Programs for Digital Signal Processing. New York: IEEE Press, 1979, program 5.2.
 Harris, Fredric J. Multirate Signal Processing for Communication Systems. Upper Saddle River, NJ: Prentice Hall PTR, 2004, pp. 60–64.
Usage notes and limitations:
All inputs must be constants. Expressions or variables are allowed if their values do not change.