Feedback Granularity Control for Multiuser MIMO-OFDMA Systems

被引：0
|
作者：
Kim, Hyun-Myung [1 ]
Min, Moonsik [1 ]
Im, Gi-Hong [1 ]
机构：
[1] Pohang Univ Sci & Technol POSTECH, Dept Elect Engn, Pohang 790784, Kyungbuk, South Korea
来源：
2013 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC) | 2013年
关键词：
limited feedback; multiuser multiple-input multiple-output (MU-MIMO); orthogonal frequency-division multiple-access (OFDMA); correlated channel; CHANNELS;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, we propose a feedback granularity control scheme for multiuser multiple-input multiple-output orthogonal frequency-division multiple access (MIMO-OFDMA) systems. The proposed scheme resizes the unit and the resolution of the feedback to efficiently exploit channel correlations in both the time and the frequency domains. Two types (centralized and distributed) of granularity search methods are proposed, and their performance characteristics over practical wireless channels are investigated. Simulation results show that the proposed schemes (particularly the distributed method) effectively calculate the optimal granularity, and thus significantly improve the sum-rate of multiuser MIMO-OFDMA systems.
引用
收藏
页码：3051 / 3055
页数：5
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