On WLS-Chebyshev IIR digital filters

Author

Netto, Sergio L. ; Diniz, Paulo S R

Author_Institution

COPPE, Univ. Fed. do Rio de Janiero, Brazil

Volume

3

fYear

1999

fDate

36342

Firstpage

303

Abstract

A method for approximating infinite-duration impulse response (IIR) digital filters is given. The method is able to compromise maximum stopband attenuation and minimum stopband energy requirements. The proposed approach performs a series of weighted-least-squares (WLS) iterations, with a weight function which is made constant within a given frequency interval at each iteration. The highly nonlinear problem characteristic of IIR filter design is pseudo-linearized using the Steiglitz-McBride formulation. As a result, IIR digital filters with partially WLS-like and partially equiripple stopbands are efficiently designed

Keywords

Chebyshev approximation; Chebyshev filters; IIR filters; digital filters; filtering theory; iterative methods; least squares approximations; transfer functions; IIR filter design; Steiglitz-McBride formulation; WLS-Chebyshev IIR digital filters; constant weight function; maximum stopband attenuation; minimum stopband energy; partially equiripple stopbands; pseudo-linearization; weighted-least-squares iterations; Attenuation; Chebyshev approximation; Design optimization; Digital filters; Frequency division multiplexing; IIR filters; Minimax techniques; Narrowband; Optimization methods; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on

Conference_Location

Orlando, FL

Print_ISBN

0-7803-5471-0

Type

conf

DOI

10.1109/ISCAS.1999.778845

Filename

778845