A computationally efficient algorithm for order-reduction of IIR filters using control techniques

Author

Dehkordi, Vahid R. ; Aghdam, Amir G.

Author_Institution

Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que.

fYear

2005

fDate

28-31 Aug. 2005

Firstpage

898

Lastpage

903

Abstract

In this paper, an algorithm is presented for reducing the order of a single-input single-output (SISO) linear time-invariant (LTI) infinite impulse response (IIR) digital filter. The algorithm uses balanced realization method which is widely used in control systems, in order to find a reduced-order approximate model and an estimate of the error bound. The process consists of an HR-to-FIR conversion step which speeds up the algorithm and makes the subsequent calculations easier. This method can be applied to any high-order digital filter used in communication and digital signal processing

Keywords

FIR filters; IIR filters; error analysis; time-varying systems; HR-to-FIR conversion; IIR filter; LTI; SISO; balanced realization; communication processing; control system; control technique; digital signal processing; error bound estimate; infinite impulse response digital filter; linear time-invariant; order-reduction; reduced-order approximate model; single-input single-output; Digital filters; Digital signal processing; Finite impulse response filter; IIR filters; Neural networks; Nonlinear filters; Power system modeling; Reduced order systems; Signal processing algorithms; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Applications, 2005. CCA 2005. Proceedings of 2005 IEEE Conference on

Conference_Location

Toronto, Ont.

Print_ISBN

0-7803-9354-6

Type

conf

DOI

10.1109/CCA.2005.1507243

Filename

1507243