Leakage-based user scheduling in MU-MIMO broadcast channel  

作　　者：XIA Xin WU Gang LIU Jing LI ShaoQian 

机构地区：[1]National Key Lab of Communication, University of Electronic Science and Technology of China, Chengdu 611731, China

出　　处：《Science in China(Series F)》2009年第12期2259-2268,共10页中国科学（F辑英文版）

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos. 60702073, 60602008, 60496313);the National Basic Research Program of China (Grant No. 2007CB310604);the National Fundamental Research Program (Grant No. A1420080150)

摘　　要：This paper investigates user scheduling in multi-user MIMO broadcast channel. We propose a leakagebased user scheduling scheme, in which a user＇s leakage power to other users is an important factor to determine whether the user should be selected. The accuracy of closed-form solution of SLNR （signal to leakage plus noise ratio） makes the proposed scheme outperform the traditional scheduling method based on SlNR （signal to interference plus noise ratio）. The proposed algorithms can work in case of perfect or limited feedback of CSI （channel state information） at transmitter, and the advantage is verified with numerical results. A tradeoff relation among feedback bits number, active user number and transmit/receive antennas number is analyzed, which serves as a system design guideline.This paper investigates user scheduling in multi-user MIMO broadcast channel. We propose a leakagebased user scheduling scheme, in which a user＇s leakage power to other users is an important factor to determine whether the user should be selected. The accuracy of closed-form solution of SLNR （signal to leakage plus noise ratio） makes the proposed scheme outperform the traditional scheduling method based on SlNR （signal to interference plus noise ratio）. The proposed algorithms can work in case of perfect or limited feedback of CSI （channel state information） at transmitter, and the advantage is verified with numerical results. A tradeoff relation among feedback bits number, active user number and transmit/receive antennas number is analyzed, which serves as a system design guideline.

关 键 词：MULTI-USER MIMO SCHEDULING PRECODING SLNR 

分 类 号：TN929.5[电子电信—通信与信息系统] TV697.11[电子电信—信息与通信工程]