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Optical Engineering

Efficient two-step digit-set-restricted modified signed-digit algorithm based on optoelectronic shared content-addressable memory
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Paper Abstract

A two-step digit-set-restricted modified signed-digit (MSD) adder based on symbolic substitution is presented. In the proposed addition algorithm, carry propagation is avoided by using reference digits to restrict the intermediate MSD carry and sum digits into {1‾,0} and {0,1}, respectively. The algorithm requires only 12 minterms to generate the final results, and no complementarity operations for nonzero outputs are involved, which simplifies the system complexity significantly. An optoelectronic shared content-addressable memory based on an incoherent correlator is used for experimental demonstration.

Paper Details

Date Published: 1 December 2005
PDF: 6 pages
Opt. Eng. 44(12) 125201 doi: 10.1117/1.2148920
Published in: Optical Engineering Volume 44, Issue 12
Show Author Affiliations
Feng Qian, Rice Univ. (United States)
Guoqiang Li, College of Optical Sciences/The Univ. of Arizona (United States)
Mohammad A. Karim, Old Dominion Univ. (United States)

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