Digital optical processing based on higher-order modified signed-digit symbolic substitution.
An efficient higher-order modified signed-digit optical symbolic substitution technique for addition and subtraction has been derived. This two-step symbolic substitution technique, which is independent of the number of bits to be processed, saves a tremendous amount of computation time. Two separate approaches for optical implementation that use content-addressable memory and the joint transform correlator are also suggested.
Alam
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Awwal
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Karim
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MA