Design and Analysis of Multi-User SDMA Systems with Noisy Limited CSIT Feedback

In this paper, we consider spatial-division multiple-access (SDMA) systems with one base station with multiple antennae and a number of single antenna mobiles under noisy limited CSIT feedback. We propose a robust noisy limited feedback design for SDMA systems. Furthermore, we show that despite the noisy feedback, the average system goodput scales as O(n(T)(1-epsilon)/n(T)-1 (C(fb) - log(2) (N(n)))) and O(n(T).log(2) P) in the interference limited regime (C(fb) < (n(T) - 1) log(2) P + log(2) N(n)) and noise-limited regime respectively.