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摘要:
In Multi-user MIMO (MU-MIMO) downlink system, suitable user selection schemes can improve spatial diversity gain. In most of previous studies, it is always assumed that the base station (BS) knows full channel state information (CSI) of each user, which does not consider the reality. However, there are only limited feedback bits in real system. Besides, user fairness is often ignored in most of current user selection schemes. To discuss the user fairness and limited feedback, in this paper, the user selection scheme with limited feedback bits is proposed. The BS utilizes codebook precoding transmitting strategy with LTE codebook. Furthermore, this paper analyzes the influence of the number of feedback bits and the number of users on user fairness and system sum capacity. Simulation results show that in order to achieve better user fairness, we can use fewer bits for feedback CSI when the number of user is small, and more feedback bits when the number of users is large.
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篇名 User Fairness Scheme with Proportional Fair Scheduling in Multi-user MIMO Limited Feedback System
来源期刊 通讯与网络(英文) 学科 工学
关键词 User FAIRNESS SCHEME with Proportional FAIR Scheduling in MULTI-USER MIMO LIMITED FEEDBACK System
年,卷(期) 2013,(3) 所属期刊栏目
研究方向 页码范围 113-118
页数 6页 分类号 TN91
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节点文献
User
FAIRNESS
SCHEME
with
Proportional
FAIR
Scheduling
in
MULTI-USER
MIMO
LIMITED
FEEDBACK
System
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研究来源
研究分支
研究去脉
引文网络交叉学科
相关学者/机构
期刊影响力
通讯与网络(英文)
季刊
1949-2421
武汉市江夏区汤逊湖北路38号光谷总部空间
出版文献量(篇)
427
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0
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0
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