On Optimal Linear Detectors, Asymptotic Efficiency, and Some CDMA Problems
Problems of Information Transmission
On Optimal Detectors in Multiuser Detection Problems
Problems of Information Transmission
Random matrix theory and wireless communications
Communications and Information Theory
IEEE Transactions on Communications
IEEE Transactions on Communications
Bounds on the sum capacity of synchronous binary CDMA channels
IEEE Transactions on Information Theory
Tight bounds on the capacity of binary input random CDMA systems
IEEE Transactions on Information Theory
Hi-index | 754.96 |
This correspondence analyzes the high signal-to-noise ratio (SNR) performance of optimum multiuser detectors for synchronous direct-sequence spread spectrum with random spreading in an additive white Gaussian noise channel. Under very general conditions on the received powers, we show that the optimum asymptotic efficiency of a K-user system with spreading gain N converges to 1 almost surely as K→∞, and K/N is kept equal to an arbitrary nonzero constant. Therefore, the asymptotic behavior of the minimum bit error rate is equivalent to that of a single-user system