Title :
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
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;
Conference_Titel :
Circuits and Systems, 1991., IEEE International Sympoisum on
Print_ISBN :
0-7803-0050-5
DOI :
10.1109/ISCAS.1991.176364
