Abstract
On the basis of signed-digit negabinary representation, parallel two-step
addition and one-step subtraction can be performed for arbitrary-length
negabinary operands. The arithmetic is realized by signed logic operations and
optically implemented by spatial encoding and decoding techniques. The
proposed algorithm and optical system are simple, reliable, and practicable,
and they have the property of parallel processing of two-dimensional data.
This leads to an efficient design for the optical arithmetic and logic
unit.
© 1997 Optical Society of America
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