A High-Speed Multiplier-Free Realization of IIR Filter Using ROM's and Elevated Signal Rate


IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E84-A   No.6   pp.1479-1487
Publication Date: 2001/06/01
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on Papers Selected from 2000 International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2000))
multiplier-free realization,  distributed arithmetic,  powers-of-two coefficients,  ROM's,  carry-lookahead adders,  

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In this paper, we propose a high-speed multiplier-free realization using ROM's to store the results of coefficient scalings in combination with higher signal rate and pipelined operations, without the need of hardware multipliers. By varying some parameters, the proposed structure provides various combinations of hardware and clock speed (or throughput). Examples are given comparing the proposed realization with the distributed arithmetic (DA) realization and direct-form realization with power-of-two coefficients. Results show that with proper choices of the parameters the proposed structure achieves a faster processing speed with less hardware, as compared to the DA realization, while it is much faster than the direct-form with slightly more hardware.