Fifth-generation mobile communication systems (5G) require significantly higher system capacity than 4G in order to accommodate rapidly increasing mobile data traffic. Cell densification is considered to be one of the most effective ways to increase the system capacity. However, severe inter-cell interference degrades the system capacity due to the increase of the line-of-sight (LOS) environment between the transmission point (TP) and the user equipment (UE). We have proposed large-scale coordinated multi-user multiple-input multiple-output (LSC-MU-MIMO), which is the combination of MU-MIMO and joint transmission from all the TPs connected to a centralized baseband unit, to increase the system capacity in dense cell environments. In this paper, we introduce our recent results of indoor experimental trials with up to sixteen TPs coordination and show that the system capacity is almost proportional to the number of TPs with LSC-MU-MIMO. We also study how to locate TPs in order to exploit potential performance of LSC-MU-MIMO. Both simulation and experimental results show that the throughput is significantly improved by deploying TPs to make at least a channel of TP LOS with a high probability. Therefore TPs are preferable to be located that UEs have at least one TP with LOS condition.
Experimental Trials of 5G Ultra High-Density Distributed Antenna Systems
2019-09-01
518606 byte
Conference paper
Electronic Resource
English
EXPERIMENTAL VERIFICATION OF HIGH GAIN ESV EMPLOYING DISTRIBUTED ARRAY ANTENNA TECHNOLOGY
British Library Conference Proceedings | 2013
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