上行多用户MIMO系统中的用户与天线联合选择方案

Joint user and antenna selection for uplink multiuser MIMO systems

在多用户MIMO系统中,基站所能同时进行通信的用户数受到基站和用户端天线数的限制,随着用户数的增加,系统的性能反而会降低,因此,用户选择技术就成为一种改善系统性能的有效技术。在本文中,针对上行多用户MIMO系统提出了一种低复杂度的用户选择算法。为获得更大的系统性能,在用户选择的基础上,进一步提出了一种用户与天线联合选择算法。这两种算法在极大地简化计算复杂度的条件下,提供了与最优算法几乎相同的性能。

In multiuser MIMO systems,the number of users that the BS can communicate with simultaneously is constrained by the antenna numbers equipped at the BS and mobile stations.As the number of users increases,however,the system performance will get worse.Therefore,user selection technique becomes an effective technique to improve the system performance.In this paper,a low complexity user selection algorithm is proposed for the uplink multiuser MIMO systems.To further improve the system performance,a joint user and antenna selection algorithm is also proposed based on the above algorithm.The two selection algorithms provide the performance very close to that of the optimal with affordable complexity.