A NOVEL ZERO-FORCING PRECODING METHOD FOR MULTI-CELL MIMO SYSTEMS  

作　　者：Zhou Wen Jiang Yongquan Fan Lisheng 

机构地区：[1]EE Department of Shantou University

出　　处：《Journal of Electronics(China)》2013年第2期152-158,共7页电子科学学刊（英文版）

基　　金：Supported by Shantou Youth Scientific Research Fund(No.YR11002);Distinguished Youth Fund in Higher Education of Guangdong Province(No.2012LYM_0064)

摘　　要：Precoding methods at the Base Station (BS) can be used to deal with the inter-cell interference and improve the signal quality of the user especially at the cell edge. In this paper, a novel Zero-Forcing (ZF) precoding method is proposed and investigated for multi-cell Multi-Input Multi-Output (MIMO) systems. We propose a relaxed ZF precoding method by relaxing the ZF criterion to some degree so that the inter-cell interference may not be zero. Complexity analysis shows that compared with the conventional ZF method, the additional computation complexity for the proposed method is trivial. Simulation results show that the proposed relaxed ZF method has better performance than the conventional ZF method in terms of the sum-rate, especially at low Signal to Noise Ratio (SNR).Precoding methods at the Base Station （BS） can be used to deal with the inter-cell interfer- ence and improve the signal quality of the user especially at the cell edge. In this paper, a novel Zero-Forcing （ZF） precoding method is proposed and investigated for multi-cell Multi-Input Multi-Output （MIMO） systems. We propose a relaxed ZF precoding method by relaxing the ZF cri- terion to some degree so that the inter-cell interference may not be zero. Complexity analysis shows that compared with the conventional ZF method, the additional computation complexity for the proposed method is trivial. Simulation results show that the proposed relaxed ZF method has better performance than the conventional ZF method in terms of the sum-rate, especially at low Signal to Noise Ratio （SNR）.

关 键 词：Coordinated multipoint transmission/reception Multi-Input Multi-Output (MIMO) Coordinated beamforming 

分 类 号：TN929.5[电子电信—通信与信息系统]