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Proceedings Paper

Digit-set-restricted modified signed-digit arithmetic based on optoelectronic shared content-addressable memory
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Paper Abstract

For efficient optoelectronic implementation of parallel algorithms, a novel two-step digit-set-restricted modified signed-digit (MSD) arithmetic based on content-addressable-memory is presented. With the introduction of the reference digits, carry propagation is avoided by restricting digit sets of the intermediate carry and sum into {-1,0} and {0,1}, respectively. In our new algorithm, without using the complement property for the nonzero outputs, only 12 minterms for all the outputs are required. More significantly, since no complement operation is involved, the optical system needs no additional reflecting unit and mask. An incoherent correlator based optoelectronic shared-content-addressable-memory processor is used to perform the arithmetic operations. A proof-of-the-principle experiment is demonstrated.

Paper Details

Date Published: 12 December 2003
PDF: 7 pages
Proc. SPIE 5201, Photonic Devices and Algorithms for Computing V, (12 December 2003); doi: 10.1117/12.505917
Show Author Affiliations
Feng Qian, Shanghai Institute of Optics and Fine Mechanics (China)
Guoqiang Li, Shanghai Institute of Optics and Fine Mechanics (China)
Mohammad S Alam, Univ. of South Alabama (United States)
Mohammad A Karim, CUNY/City College (United States)


Published in SPIE Proceedings Vol. 5201:
Photonic Devices and Algorithms for Computing V
Khan M. Iftekharuddin; Abdul Ahad S. Awwal, Editor(s)

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