Title :
On WLS-Chebyshev IIR digital filters
Author :
Netto, Sergio L. ; Diniz, Paulo S R
Author_Institution :
COPPE, Univ. Fed. do Rio de Janiero, Brazil
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;
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
DOI :
10.1109/ISCAS.1999.778845
