Journal of Communications
In this paper, the authors discuss the finite-rate feedback-based ZF for multiuser MIMO in case of small number of candidate users to be selected and small number of quantization bits to be fed back. In this paper, the multiplexing gain from ZF is limited. Under the assumption of small number of candidate users, then the paper further analyzes throughput of ZF with different number of co-scheduled users. From the analysis, the throughput of ZF is limited by the loss of target signal power and the residual interference from the co-scheduled users.