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The Computer Journal 1996 39(8):713-722; doi:10.1093/comjnl/39.8.713
© 1996 by British Computer Society
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Array Processors Design for Division-free Linear System Solving

S. Peng * and S. Sedukhin *

The University of Aizu, Fukushima 965-80, Japan. Email: s-peng{at}u-aizu.ac.jp

Division-free algorithms for solving the linear algebra problems and their applications in signal/image processing have attracted interests in parallel processing. In this paper the design of systolic array processors for solving linear systems of equations using division-free Gaussian elimination method is presented. The design is based on a systematics approach with constructs array processors systematically by first investigating parallel versions of the division-free algorithm and their three-dimensional dependency graphs, and then generating the planar systolic array processors by projecting the dependency graph along properly selected directions. The resulting array processors are synthesized and analysed. It is shown that some array processors are optimal. The key for designing an optimal array processor is to design a parallel algorithm whose dependency graph is well-structured. The array processors are optimal in terms of number of processing elements, number of input/output ports, time of processing and pipelining period.

Received December 13, 1995. revised November 21, 1996.

* The University of Aizu, Fukushima 965-80, Japan Email: s-peng{at}u-aizu.ac.jp


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