January 8, 2009   

  

Abstract  

In this paper, we propose a multi-user scheduling scheme to maximize the ergodic sum-rate of the  
uplink of a multi-user multiple-input multiple-output wireless system. The proposed scheduling scheme 
only utilizes the receive correlation  information of users without instan taneous channel state information  
(CSI). It can be applied to the collaborative spa tial multiplexing mode speci fied in the IEEE 802.16e  
mobile-WiMAX system, where the number of users in  transmission is limited to the number of receive  
antennas of the BS at each time slot. An upper-b ound analysis and numerical results show that the  
proposed scheduling scheme outperforms conventional random scheduling scheme in terms of the ergodic  
sum-rate without loss of opportunity fairness. Moreover, the proposed scheduling scheme can provide an 
ergodic sum-rate comparable to full-CSI based scheduling scheme in the presence of user mobility, while  
significantly reducing the feedback signaling overhead.