Generates a vector of a Chebyshev window of a given length.

Syntax

W = ChebyWin(Length, R, Type)

Arguments

Name

Description

Length

A positive integer specifying the length of the window.

R

The difference between the sidelobe and the mainlobe magnitudes of the Fourier transform of the window.  The sidelobe is attenuated by this value from the mainlobe magnitude.  Must be a negative scalar.

Type

A string. ‘periodic’ or ’symmetric’ (default). See Comments.

Output

Name

Description

W

Vector containing the window of specified length.

Example

A Chebyshev window of length 32 and a side lobe attenuation of 20 dB from the main lobe:

Syntax

W = ChebyWin(32,-20)

Result

W is a 32 element vector.

Comments

When Type = ’symmetric', the vector is symmetric about its median. This case is appropriate for time domain processing, as when using an FIR filter.

When Type = ’periodic’, the vector contains the first Length points of a (Length+1) symmetric vector. This case is appropriate for frequency domain processing, as when using BlockFft.

See Also:

BlackmanWin

HammWin

HannWin

WelchWin

ParzenWin