Efficient digital filter design tool for approximating an...

Details Efficient digital filter design tool for approximating an... Efficient digital filter design tool for approximating an...

2008-05-13

2008-05-13

An, Meng-Al T. (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

C708S304000

Reexamination Certificate

active

10827504

ABSTRACT:
A method and apparatus for designing low-order linear-phase IIR filters is disclosed. Given an FIR filter, the method utilizes a new Krylov subspace projection method, called the rational Arnoldi method with adaptive orders, to synthesize an approximated IIR filter with small orders. The method is efficient in terms of computational complexity. The synthesized IIR filter can truly reflect essential dynamical features of the original FIR filter and indeed satisfies the design specifications. In particular, the linear-phase property is stilled remained in the passband.

REFERENCES:
Herng-Jer Lee, Chia-CHi Chu, and Wu-Shiung Feng; Inteligent multipoint Arnoldi (IMA) approximations of FIR order linear-phase IIR filters; May 26-29, 2002; Dept. of Electr. Eng., Chang Gung Univ., Taoyuan, Taiwan; Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on; vol. 1; p. I-417-I-420.

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