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Yang and Fuja presented constructions of codes with unequal correlation constraints (lambdac < lambdaa). And specifically they have constructions for the case where lambdaa = 2 > lambdac = 1. In their work they argue that it is important to make the cross-correlation (lambdac) as small as possible, and not necessarily lambdaa = lambdac. In this work we present a method to generate new Yang-Fuja...
Digital watermarking applications require constructions of double-periodic matrices with good correlations. More specifically we need as many matrix sequences as possible with both good auto and cross-correlation. Furthermore it is necessary to have double-periodic sequences with as many dots as possible. In this paper we present a method that increases the number of sequences, and another that increases...
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