Dynamic mode switch algorithm in multi-cell MU-MIMO systems

被引：2
|
作者：
Li J. [1 ]
Ma Y. [1 ]
Liu W. [1 ]
Shi C. [2 ]
机构：
[1] State Key Lab. of Integrated Service Networks, Xidian Univ.
[2] School of Telecommunication Engineering, Xidian Univ.
来源：
Xi'an Dianzi Keji Daxue Xuebao/Journal of Xidian University | 2011年 / 38卷 / 05期
关键词：
Interference alignment; Interference management; MIMO systems; Multi-cell; Multi-user;
D O I：
10.3969/j.issn.1001-2400.2011.05.001
中图分类号：
学科分类号：
摘要：
Based on the interference alignment (IA) method, by cascading the inter-cell interference rejection matrix P before the intra-cell interference rejection matrix, the rates of cell edge users can be improved obviously. However, this method can only be designed for users at a fixed position; however, users are randomly distributed in real cellular systems. So, a dynamic mode switch (DMS) scheme is proposed. The users in a cell calculate a threshold according to its suffered interferences and choose the preferred mode accordingly (IA-MMSE or MF scheme), and opportunistic dispatch is performed at the base stations for two groups. Simulation shows that the DMS scheme can achieve the improved performance of the cell edge users without affecting the rates of the cell center users. At the same time, the rates of the cell edge users are further improved through the optimization of matrix P.
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页码：1 / 6
页数：5
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