一种多用户MIMO系统的公平调度算法

A Fairness Scheduling Algorithm for Multiuser MIMO Downlink System

多用户多输入多输出(MIMO)系统中需要对用户进行合理调度,一般基于信道增益的调度算法忽略了用户之间的公平性。基于此,提出了一种公平的多用户调度算法,其思想是先根据信道条件数初选出用户,然后统计每个用户被选择的次数,如果次数之差的绝对值大于设定门限,则选择次数少的用户。这样既能获得多用户分集增益又兼顾了公平性。仿真结果表明,提出的调度算法在系统性能无明显损失的情况下保证了用户公平性。

The problem of multiuser fairness in multiuser MIMO system is addressed.We select users according to the channel conditioning,and then count the selection number.If the absolute difference between any numbers is larger than a given threshold,the user with the smaller number will be chosen.The fairness scheduling algorithm makes a good compromise between the multiuser diversity gain and fairness.Simulation results show that the proposed scheduling algorithm improves fairness without much loss in system performance.