NDLI: Analytical Results of Field Experiment on Precoding-Based Vertical Plane Beam Control for LTE-Advanced Systems

Content Provider	IEEE Xplore Digital Library
Author	Hoshino, K. Nabatame, S. Nagate, A. Fujii, T.
Copyright Year	2014
Description	Author affiliation: R&D Div., Softbank Mobile Corp., Tokyo, Japan (Hoshino, K.; Nabatame, S.; Nagate, A.; Fujii, T.)
Abstract	Most current cellular mobile communication systems employ 1-cell frequency reuse to achieve high spectrum efficiency. With 1-cell frequency reuse, the co-channel interference among cells remains a critical barrier to achieving further improvements in the spectrum efficiency. Vertical plane beam control at the base station is one approach to mitigating the co-channel interference. The conventional method of vertical plane beam control, antenna beam tilting, is widely used. In antenna beam tilting, the tilt angle is generally fixed for each base station. If the vertical plane beam can be changed dynamically, it becomes possible to significantly improve the reception environment. Given this background, we have proposed precoding- based vertical plane beam control. In the proposed method, the vertical plane beam pattern for each mobile station is easily changed dynamically by just the precoding operation without changing the conventional antenna configuration drastically. To demonstrate the feasibility and performance of the proposed method, we develop a prototype system, in which the proposed scheme is implemented on an LTE- based system, and conduct a field experiment. This paper overviews the prototype system and the field experiment results. They clarify that the proposed method is effective in mitigating interference level to the neighbor cells as well as improving the desired signal level in the serving cell. We also conduct a theoretical analysis and confirm that the experimental results well match the theoretical results.
Starting Page	1
Ending Page	5
File Size	365307
Page Count	5
File Format	PDF
ISBN	9781479944491
DOI	10.1109/VTCFall.2014.6965884
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-09-14
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Antennas Throughput Interference Indexes Signal to noise ratio Downlink Prototypes
Content Type	Text
Resource Type	Article

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