多用户MIMO下行链路中一种传输方式自适应调度算法

A multiuser MIMO downlink scheduling algorithm with transmission mode adaptation

目的针对多用户MIMO下行链路,提出一种传输方式自适应调度算法。方法该算法由各移动用户根据信道状态选择与基站的通信方式,包括波束形成和空分复用,并向基站自适应反馈信道信息;基站根据各移动用户的反馈信息选择用户子集。结果该算法实现了基站和移动用户联合用户调度,系统反馈开销由各用户的信道状态共同决定。结论与已有方法相比,该算法能够同时获得高的系统容量和更好的BER性能。

Aim To propose a multiuser MIMO downlink scheduling algorithm with transmission mode adaptation. Methods In the algorithm each mobile station （MS） chooses transmission scheme, including beamforming （BF） and spatial multiplexing （SM） according to its channel state and then feeds back channel state information （CSI） to the base station （BS）. BS receives CSI from each MS and selects user subset. Results The user scheduling is carried out by MS and BS cooperatively. The system feedback load depends on each MS＇s channel state. Conclusion Compared with existing methods the proposed algorithm can achieve high system capacity together with better BER performance.