多用户MIMO系统中基于博弈论的鲁棒性功率分配

摘要

This paper presents a power allocation scheme based on non-cooperative Game theory for multi-user multi-input multi-output ( MU-MIMO ) antenna systems. The game scheme uses the signal-to-leakage-and-noise ratio( SLNR) of users in the system as a guide of power allocation and fairness parame-ter setting,furthermore establishes a game model to ensure users’ Quality of Service( QoS) and fairness,as well as proves the existence of Nash equilibrium( NE) . Secondly,considering the influence of channel esti-mation error,it proposes an iterative algorithm based on sliding model to update allocated power in order to meet the minimum QoS requirements among all users. Simulation results show that the scheme can improve the system throughput compared with the existing schemes in the presence of channel error.%针对多用户多输入多输出( MU-MIMO)天线系统，提出了一种基于非合作博弈论的功率分配方案。此博弈模型中，以用户在系统中的信号泄漏噪声比值( SLNR)作为用户功率分配和公平性参数设置的依据，保证用户所期望的服务质量和公平性，并证明了纳什均衡的存在性。其次，考虑信道估计误差的影响，提出了一种基于滑动模型的迭代功率分配控制算法满足所有用户的最小通信质量要求。仿真结果显示此方案在信道误差的情况下，相比现有方案可提高系统吞吐量。