BER Performance Analysis of Multiuser Diversity with Antenna Selection in MRC MIMO Systems

In this paper, we present a performance analysis for the user scheduling for the multiuser MRC MIMO systems exploiting the user and antenna diversities. We consider two scheduling schemes including absolute SNR-based scheduling and normalized SNR-based scheduling schemes. We propose the utilization of an antenna selection scheme to overcome the drawback of channel hardening in multiuser MIMO systems and to improve the system performance. We derive new closed-form expressions for the average bit error rate of the presented schemes for two scenarios: heterogeneous (independent nonidentically distributed SNRs-i.n.i.d.) and homogeneous (independent identically distributed SNRs- i.i.d.) cases. Using mathematical analysis and numerical simulations, we compare the presented schemes.