空分复用多输入多输出系统中的分组多用户分集

Grouped Multiuser Diversity for Spatial Multiplexing MIMO Systems

该文针对基于空分复用的多用户多输入多输出系统下行链路,研究了空间衰落相关和信道估计误差对系统容量的影响,提出了两种新的分组多用户分集方案。所提出的方案通过合理选择共道用户,能有效提升系统容量,同时兼顾公平性。分析和仿真结果表明,所提出的方案对衰落相关性以及信道估计误差具有较好的稳健性;其中,第2种方案与第1种相比较,容量性能更优,但具有较高的计算复杂度。

Focusing on the spatial multiplexing multiuser Multiple-Input Multiple-Output （MIMO） downlink, this paper studies the influence of the spatial fading correlation and the channel estimation error on the system capacity Two novel grouped multiuser diversity schemes are proposed. The proposed schemes can effectively increase the system capacity by rightly selecting the co-channel users, and can provide a good fairness performance. Both analysis and simulation results show that the schemes are robust for the fading correlation and channel estimation errors. The second scheme can further increase the system capacity compared with the first one, but possesses higher computational complexity.