Adaptive Resource Allocation Scheme for Multiuser MIMO/OFDM Downlink with Channel Estimation Error
信道估计误差下多用户MIMO／OFDM下行系统自适应传输

In this paper,we propose an adaptive resource allocation scheme for spatial multiplexing based multi-user MIMO/OFDM downlink system under imperfect channel information to maximize the system sum-rate and satisfy user's QoS parameters.Specially,sub-carriers are first allocated according to user's channel estimation error model and QoS pa- rameters.Then power and bit allocation is carried out on each sub-carrier accordingly.Simulation results show that the proposed adaptive scheme could achieve more system sum-rate than the fixed scheme.And it is more robust to channel error and more practical in realistic wireless communication systems with channel uncertainties.