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Paper
Optimum Sequence Multisets for Synchronous Code-Division Multiple-Access Channels
Abstract
It is shown that the sum capacity of the symbol-synchronous code-division multiple-access channel with equal average-input-energy constraints is maximized precisely by those spreading sequence multisets that meet Welch's lower bound on total squared correlation. It is further shown that the symmetric capacity of the channel determined by these same sequence multisets is equal to the sum capacity. © 1994 IEEE