Novel Cellular Active Array Antenna System at Base Station for Beyond 4G

Masayuki NAKANO

IEICE TRANSACTIONS on Communications   Vol.E100-B    No.2    pp.195-202
Publication Date: 2017/02/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2016WSI0001
Type of Manuscript: Special Section INVITED PAPER (Special Section on Antenna and Propagation Technologies Contributing to Realization of Next Generation Wireless Systems)
active antenna system,  null,  cellular,  base station antenna,  small cell,  

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This paper introduces a base station antenna system as a future cellular technology. The base station antenna system is the key to achieving high-speed data transmission. It is particularly important to improve the frequency reuse factor as one of the roles of a base station. Furthermore, in order to solve the interference problem due to the same frequency being used by the macro cell and the small cell, the author focuses on beam and null control using an AAS (Active Antenna System) and elucidates their effects through area simulations and field tests. The results showed that AAS can improve the SINR (signal to interference-plus-noise ratio) of the small cell area inside macro cells. The paper shows that cell quality performance can be improved by incorporating the AAS into a cellular base station as its antenna system for beyond 4G radio access technology including the 5G cellular system.