Joint Spatial-Frequency Opportunistic Multiuser Diversity for VBLAST OFDMA
For OFDMA system, the greedy subcarrier and bit loading can be adopted to exploit the multiuser diversity in frequency domain for the independent fading of different users and achive higher cell throughput without considering the user fairness. Meanwhile in MIMO scenario, different UE experience independent spatial fading for different location,and thus the different antenna at the Base Station (BS) can be allocated to diffferent UEs to exploit the spatial multiuser diversity gain. In this paper, the Joint Spatial-Frequency Opportunistic Multiuser scheduling is proposed for VBLAST OFDMA downlink to obtain the spatial-frequency multiuser diversity and better throughput performance. As only partial CSI is available at the transmitter, the SNR of the postdetection of every transmit antennas are feedback, the total power of BS is divided into every antenna of every subcarrier uniformly. The simulaton results shows that the proposed algorithm is better than that of frequency domain greedy algorithm by 20％ .
Guangyi LIU Bei ZHOU Feng JIANG Ying WANG Ping ZHANG Hongyan CUI
WTI Institute, Beijing University of Posts&Telecoms，P.O. Box 92, No. 10, XiTuCheng Road, HaiDian District, Beijing, P.R.China,100876
国际会议
2006 International Conference on Communications,Circuits and Systems(第四届国际通信、电路与系统学术会议)
广西桂林
英文
1026-1030
2006-06-25（万方平台首次上网日期，不代表论文的发表时间）