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Optimal sequences and sum capacity of synchronous CDMA systems

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2 Author(s)
P. Viswanath ; Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA ; V. Anantharam

The sum capacity of a multiuser synchronous CDMA system is completely characterized in the general case of asymmetric user power constraints-this solves the open problem posed by Rupf and Massey (see ibid., vol.40, p.1261-6, 1994) which had solved the equal power constraint case. We identify the signature sequences with real components that achieve sum capacity and indicate a simple recursive algorithm to construct them

Published in:

IEEE Transactions on Information Theory  (Volume:45 ,  Issue: 6 )