An IIR ADF with parallel connected biquads and its controllability

Author

Takumi, Ichi ; Hata, Masayasu

Author_Institution

Dept. of Electr. & Comput. Eng., Nagoya Inst. of Technol., Showaku, Nagoya, Japan

fYear

1991

fDate

11-14 Jun 1991

Firstpage

424

Abstract

The authors propose a novel method of pole controlled infinite impulse response (IIR) adaptive digital filters (ADFs) and show its pole controllability with trajectories of poles on the MSE surface. The proposed IIR ADF consists of an FIR (finite impulse response) part and an IIR part. The FIR part identifies flat delay and echo responses which come from poles near the origin of the z-plane. The IIR part consists of several second order IIR filters connected in parallel. The filter sections are able to operate mutually independently. This type of IIR ADF has no stability problem in controlling the pole location, since the ADF consists of stable biquad sections or second order IIR sections. Simulation results show that the proposed IIR ADF has an excellent pole controllability

Keywords

adaptive filters; controllability; digital filters; filtering and prediction theory; poles and zeros; adaptive digital filters; infinite impulse response; parallel connected biquads; pole controllability; pole location; second order IIR filters; stable biquad sections; Adaptive control; Controllability; Delay; Digital filters; Error correction; Finite impulse response filter; IIR filters; Programmable control; Stability; Transversal filters;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1991., IEEE International Sympoisum on

Print_ISBN

0-7803-0050-5

Type

conf

DOI

10.1109/ISCAS.1991.176364

Filename

176364