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Synchronization codes in the spatial and temporal domains

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Abstract

A class of bar code sequences is considered, and it is shown that its autocorrelation coefficients are similar to those of the Barker codes1 which are the optimum codes for synchronization of digital communications. The proposed bar codes are optimum in the sense that their autocorrelation peak equals the number of transparent bars and the side lobe level ≤ 1. Merit factors of these bar codes are defined and calculated. The difference between the spatial and temporal codes is discussed in a consideration that the optical alignment of two objects is the synchronization of mechanical movement in the spatial domain.2

© 1991 Optical Society of America

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