Space-time technique for wireless multiuser MIMO systems with SIC receivers

Abstract

Recently, multiple-input multiple-output (MIMO) systems have shown the potential to achieve high speed data transmissions by improving spectral efficiency over wireless fading channels. In multiuser MIMO environment, the radio base station (Node-B) supports mobile user equipments (UEs) with different quality-of-service (QoS) requirements, where the adopted scheduling scheme controls the selection of UEs for service provision and has an impact on the system performance. In this paper, two basic scheduling rules are described, which are combined with and without successive interference cancellation (SIC) receivers, respectively. We then propose the hybrid scheduler which outperforms those two rules in terms of system capacity. Simulation results show that the performances of conventional scheduling schemes heavily depend on the number of UEs, to which the proposed scheme is robust and achieves the improved capacity gain.