Tight Bounds on the Capacity of Binary Input Random CDMA Systems
Tight Bounds on the Capacity of Binary Input Random CDMA Systems
In this paper, we consider code-division multiple-access (CDMA) communication over a binary input additive white Gaussian noise (AWGN) channel using random spreading. For a general class of symmetric distributions for spreading sequences, in the limit of a large number of users, we prove an upper bound to the capacity. The …