Title :
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.
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;
Conference_Titel :
Control Applications, 2005. CCA 2005. Proceedings of 2005 IEEE Conference on
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-9354-6
DOI :
10.1109/CCA.2005.1507243
