Spatial blanking method for massive MIMO-FBMC system

• Main Authors: Wang Jia'nan, Zhou Xiaoping, Li Li, Xiang Haokai, Wang Bin
• Format: Article
• Language: English
• Published: Academic Journals Center of Shanghai Normal University 2017-02-01
• Series: Journal of Shanghai Normal University (Natural Sciences)
• Subjects: massive MIMO-FBMC; small cells; spatial blanking; coordinated beamforming
• Online Access: http://qktg.shnu.edu.cn/zrb/shsfqkszrb/ch/reader/view_abstract.aspx?file_no=20170114&flag=1

In this paper,we study the downlink performance of MIMO-FBMC system where small cells are deployed under a macrocell,both macro and small cells share the same spectrum.Assume the regime of massive MIMO in the macrocell,the users of the same hotspot are seen under a relatively narrow angular spread from the macrocell appearing almost co-located to the macrocell.This leads to directional channel vectors,which can be exploited to simplify coordinated beamforming techniqueand obtain spatial blanking,a means of concentrating energy only in certain directions while creating transmission opportunities for the small cells lying in the other directions,and mitigating interference to the small cells.It is in analogy with the almost-blank subframes approach of eICIC.Simulation results show that the proposed algorithm can improve the system capacity of massive MIMO-FBMC.