Fairness Adjustable Grouping Multiuser Scheduling for MIMO MAC with MMSE-SIC Receiver

A fairness adjustable grouping (FAG) multiuser scheduling algorithm based on MMSE-SIC (minimum mean square error-successive interference cancel) receiver is proposed for MIMO MAC (multiple access channel). The implementation in the 3GPP LTE VMIMO (virtual multiple input multiple output) systems as pairing scheduling (PS) is discussed. This algorithm makes use of the proportional fair (PF) scheduling to select the primary user, and applies of grouping method as well as a designed fairness adjustable pairing criterion to select the paring user which takes account of both the channel orthogonality and system capacity. The comparison simulation results show that the FAGPS scheme exploits the multiplexing gain and the multiuser diversity gain, while at the same time improves the service quality of the users at the cell edge. Furthermore, the tradeoff between the system throughput and user fairness can be achieved by varying an adjustable coefficient of the algorithm.