Title :
Design of IIR digital filters using all-pass networks
Author :
Ikehara, Masaaki ; Tanaka, Hiroyuki ; Kuroda, Hideo
Author_Institution :
Fac. of Sci. & Technol., Keio Univ., Yokohama, Japan
fDate :
3/1/1994 12:00:00 AM
Abstract :
This paper presents a new method of designing the generalized IIR digital filter in the form of a parallel connection of two all-pass filters. It is shown that the numerator of the overall transfer function of this form can be expressed as real function of the all-pass coefficients. Then Remez algorithm is applied to the numerator and the rational approximation problem is transformed into a linear problem. IIR digital filters with the desired specification can be directly designed in the z-domain by this method. The proposed algorithm converges through a few iterations, and the amplitude property of IIR digital filter has equiripple
Keywords :
all-pass filters; digital filters; iterative methods; transfer functions; IIR digital filters; Remez algorithm; all-pass networks; amplitude property; equiripple; iterations; parallel connection; rational approximation problem; real function; transfer function; z-domain; Adaptive filters; Design methodology; Digital filters; Digital images; Filtering; IIR filters; Interference elimination; Signal processing; Signal processing algorithms; Speech;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
