多小区MU-MIMO系统中的动态模式切换算法

doi:10.3969/j.issn.1001-2400.2011.05.001

Abstract

Abstract:

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.

Key words: interference alignment, MIMO systems, multi-user, interference management, multi-cell

CLC Number:

TN929.5

LI Jiandong;MA Yanjun;LIU Wei;SHI Chao. Dynamic mode switch algorithm in multi-cell MU-MIMO systems[J].J4, 2011, 38(5): 1-6.

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

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