, Volume 30, Issue 1, pp 73-84

Meeting the Welch and Karystinos-Pados Bounds on DS-CDMA Binary Signature Sets

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The Welch lower bound on the total-squared-correlation (TSC) of binary signature sets is loose for binary signature sets whose length L is not a multiple of 4. Recently Karystinos and Pados [6,7] developed new bounds that are better than the Welch bound in those cases, and showed how to achieve the bounds with modified Hadamard matrices except in a couple of cases. In this paper, we study the open cases.