• Matlab Program For Dolph Chebyshev Array Technologies Group

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Package: sigwin

Construct Dolph-Chebyshev window object

• University of Oulu, Degree program in electrical engineering. Bachelor’s Thesis, 57 p ABSTRACT In this thesis, the antenna arrays researched and modelled using Sensor Array Analyzer- application (SAA) from MATLAB. The objective is to explore the array modelling capabilities of the SAA application.
• It is tool to produce radiation pattern for following antenna arrays: 1. Binomial and 4. Dolph - Chebyshev. Run.m file and enter the no. Of elements and distance to produce radiation pattern. Optimization of codes has been done as a matter of practice. Suggestions are highly encouraged.

Description

Note

The use of sigwin.chebwin is not recommended.Use chebwin instead.

sigwin.chebwin creates a handle to a Dolph-Chebyshevwindow object for use in spectral analysis and FIR filtering by thewindow method. Object methods enable workspace import and ASCII fileexport of the window values.

The Dolph-Chebyshev window is constructed in the frequency domainby taking samples of the window's Fourier transform:

Matlab Program For Dolph Chebyshev Array Technologies Group

$$\widehat{W}(k)={(-1)}^k\frac{\cos [N{\cos }^{-1}[\beta \cos (\pi k/N)]]}{\cosh [N{\cosh }^{-1}(\beta )]},0\le k\le N-1$$

where

How to install vray material converter calculator. Approximation is Dolph-Chebyshev. It brings the beam with equiripple sidelobes and, consequently, high power in the. In antenna array design, uniform linear arrays forming. An example of MATLAB code for the design of. Th-derivative Chebyshev arrays is given in the Appendix.

$$\alpha$$ determines the level of thesidelobe attenuation. The level of the sidelobe attenuation is equalto $$-20\alpha$$. For example, 100 dB of attenuationresults from setting $$\alpha =5$$

The discrete-time Dolph-Chebyshev window is obtained by takingthe inverse DFT of $$\widehat{W}(k)$$ and scaling theresult to have a peak value of 1.

Construction

H = sigwin.chebwin returns a Dolph-Chebyshevwindow object H of length 64 with relative sidelobeattenuation of 100 dB.

H = sigwin.chebwin(Length) returnsa Dolph-Chebyshev window object H of length Length withrelative sidelobe attenuation of 100 dB. Length requiresa positive integer. Entering a positive noninteger value for Length roundsthe length to the nearest integer. A window length of 1 results ina window with a single value equal to 1.

H = sigwin.chebwin(Length,SidelobeAtten) returnsa Dolph-Chebyshev window object with relative sidelobe attenuationof atten_param dB.

Properties

Methods

Copy Semantics

Handle. To learn how copy semantics affect your use of the class,see CopyingObjects (MATLAB) in the MATLAB^® Programming Fundamentals documentation.

Examples

Generate a Dolph-Chebyshev window of length N = 16. Specify a relative sidelobe attenuation of 40 dB. Return the window values as a column vector. Show information about the window object. Display the window.

References

harris, fredric j. “On the Use of Windows for HarmonicAnalysis with the Discrete Fourier Transform.” Proceedingsof the IEEE^®. Vol. 66, January 1978, pp. 51–83.

See Also

chebwinwindowwvtool

Topics

• ClassAttributes (MATLAB)
• PropertyAttributes (MATLAB)