多天线的发送分集系统中多用户分集的研究  

Multiuser diversity in the multiple-antenna data networks over the fading channels

作　　者：汪安春[1] 佘小明[1] 周世东[1] 许希彬[1] 姚彦[1] 

机构地区：[1]清华大学微波与数字通信国家重点实验室,北京100084

出　　处：《通信学报》2004年第5期10-19,共10页Journal on Communications

基　　金：国家"863"基金资助项目(2001AA123012)

摘　　要：研究了如何通过选择发送天线和天线组合来提高整个多用户多天线系统的性能。本文分别讨论了STOBC、选择式发送分集、相位加权等各种发送信号结构下系统的调度性能。和其它发送信号结构相比,STOBC对于调度性能有着很大危害。信道反馈信息越多,调度性能就越好。不同的发送天线选择和组合策略得到不同的性能。本文讨论了三种选择策略:max-max, max-sum和max-min。max-max的调度性能优于其它两种策略。因此,发送信号的结构和选择策略都严重影响着多用户分集。We address the problem of multiuser diversity in the multiple-antennna wireless systems. Several schemes such as space-time orthogonal block code(STOBC), antenna selection and phase weighting are investigated and it is shown the throughput of STOBC is lower than that of the single transmit antenna. When there are two receive antennas, antenna selection and combination is used to utilize the scheduling gain. We propose three strategies called max-max, max-sum and max-min to select the best combination. It is shown that the max-max strategy has the maximal throughput. In a word, transmit signal structures, receiver structures and selection strategies have great influences on the multiuser diversity.

关 键 词：多输入多输出 多用户分集 时空正交码 线性分散码 发送分集 调度 天线选择 

分 类 号：TN911.5[电子电信—通信与信息系统]