sigwin.chebwin Class
Namespace: sigwin
Construct Dolph-Chebyshev window object
Description
Note
The use of sigwin.chebwin
is not recommended.
Use chebwin
instead.
sigwin.chebwin
creates a handle to a Dolph-Chebyshev
window object for use in spectral analysis and FIR filtering by the
window method. Object methods enable workspace import and ASCII file
export of the window values.
The Dolph-Chebyshev window is constructed in the frequency domain by taking samples of the window's Fourier transform:
where
determines the level of the sidelobe attenuation. The level of the sidelobe attenuation is equal to . For example, 100 dB of attenuation results from setting
The discrete-time Dolph-Chebyshev window is obtained by taking the inverse DFT of and scaling the result to have a peak value of 1.
Construction
H = sigwin.chebwin
returns a Dolph-Chebyshev
window object H
of length 64 with relative sidelobe
attenuation of 100 dB.
H = sigwin.chebwin(
returns
a Dolph-Chebyshev window object Length
)H
of length Length
with
relative sidelobe attenuation of 100 dB. Length
requires
a positive integer. Entering a positive noninteger value for Length
rounds
the length to the nearest integer. A window length of 1 results in
a window with a single value equal to 1.
H = sigwin.chebwin(
returns
a Dolph-Chebyshev window object with relative sidelobe attenuation
of Length
,SidelobeAtten
)atten_param
dB.
Properties
|
Dolph-Chebyshev window length. |
|
The attenuation parameter in dB. The attenuation parameter is a positive real number that determines the relative sidelobe attenuation of the window. |
Methods
generate | Generates Dolph-Chebyshev window |
info | Display information about Dolph–Chebyshev window object |
winwrite | Save Dolph-Chebyshev window object values in ASCII file |
Copy Semantics
Handle. To learn how copy semantics affect your use of the class, see Copying Objects in the MATLAB® Programming Fundamentals documentation.
Examples
References
harris, fredric j. “On the Use of Windows for Harmonic Analysis with the Discrete Fourier Transform.” Proceedings of the IEEE®. Vol. 66, January 1978, pp. 51–83.