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Proceedings Paper

Optical Flixed-Point Arithmetic
Author(s): Richard P. Bocker; Mark E. Lasher; William J. Miceli; Richard H. Patterson; Barry L. Drake
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Paper Abstract

The DMAC (Digital Multiplication by Analog Convolution) algorithm has been shown to be one technique for performing optical matrix-multiplication with improved precision. Past work in this area has addressed fixed-point arithmetic only. Presented in this paper is an extension of the DMAC algorithm for handling floating-point binary numbers as well. However, the technique employed for handling floating-point numbers is based on fixed-point concepts. For this reason we choose to call the arithmetic as being flixed-point, since it is a hybrid combination of both floating and fixed-point arithmetic. In this paper we also describe an acousto-optical time-integrating architecture using binary flixed-point arithmetic to perform matrix-vector multiplication. By employing an array of full-adders in conjunction with the photodetector array at the back-end of this architecture, it is possible to avoid generating mixed binary outputs that normally result through the use of the DMAC algorithm. Hence, we eliminate the need for analog-to-digital converters needed to convert mixed binary to pure binary. Preliminary experimental results are also presented.

Paper Details

Date Published: 4 January 1986
PDF: 7 pages
Proc. SPIE 0564, Real-Time Signal Processing VIII, (4 January 1986); doi: 10.1117/12.949716
Show Author Affiliations
Richard P. Bocker, Naval Ocean Systems Center (United States)
Mark E. Lasher, Naval Ocean Systems Center (United States)
William J. Miceli, Naval Ocean Systems Center (United States)
Richard H. Patterson, Naval Ocean Systems Center (United States)
Barry L. Drake, Naval Ocean Systems Center (United States)

Published in SPIE Proceedings Vol. 0564:
Real-Time Signal Processing VIII
Keith Bromley; William J. Miceli, Editor(s)

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