NDLI: New approach to clustered look-ahead pipelined IIR digital filters

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New approach to clustered look-ahead pipelined IIR digital filters

Content Provider	IEEE Xplore Digital Library
Author	Soderstrand, M.A. de la Sema, A.E. Loomis Jr., H.H.
Copyright Year	1992
Abstract	Authors Lim and Liu (see IEEE Trans. Signal Process., vol. 40, no. 7, p.1643-51, 1992) recently introduced the "minimum order augmentation" technique for pipelining IIR digital filters which guarantees the addition of the least number of superfluous poles to obtain a stable pipelined IIR filter while maintaining a "clustered look-ahead" pipeline structure. Unfortunately, this minimization of the superfluous poles comes at the expense of adding additional denominator multipliers. In this paper, we introduce a "minimum order clustered look-ahead" that achieves the minimum number of superfluous poles possible while minimizing the total-number of multipliers for a "clustered look-ahead" pipeline structure. We show that while our new technique does in some instances require more superfluous poles, the increase in hardware complexity with respect to incremental augmentation is lower when compared to the Lim and Liu approach. A MATLAB computer program is described which allows the design of any order pipelined IIR filter. Examples demonstrate that stable "clustered look-ahead" pipelined IIR filters can be designed with the minimum number of superfluous poles (as achieved by Lim and Liu), but with fewer denominator multipliers thus reducing significantly the computational complexity in many cases. Furthermore, an analytic solution to the second-order case gives a very practical approach to pipelined IIR filter design with great insight into the stability characteristics of pipelined IIR filters.<>
Sponsorship	IEEE Circuits and Systems Society
Starting Page	269
Ending Page	274
Page Count	6
File Size	612484
File Format	PDF
ISSN	10577130
Volume Number	42
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-04-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Digital filters Pipeline processing IIR filters Sampling methods Computational complexity Delay Scattering Frequency Time domain analysis Stability
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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