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On quasi-orthogonal signatures for CDMA systems
IEEE Transactions on Information Theory
Sum capacity optimal signatures in synchronous code-division multiple-access (CDMA) systems are functions of the codebook length as well as the number of active users. A new signature set must be assigned every time the number of active users changes. This correspondence considers signature sets that are less sensitive to changes in the number of active users. Equiangular signature sequences are proven to solve a certain max-min signal-to-intererference-plus-noise problem, which results fromdoi:10.1109/tit.2005.864469 fatcat:a5lbidvlavfrra7ycohm7cdjpq