轨道交通场景5G关键技术

在概述第五代移动通信(the fifth generation，5G)三大核心应用场景、标准组织及标准化情况的基础上，着重介绍大规模MIMO(massive MIMO)、毫米波(millimeter wave)以及非正交多址(non-orthogonal multiple access，NOMA)3项5G关键技术的简要原理以及我国相关的研究情况。同时，阐述3项5G关键技术在轨道交通场景中的应用与研究现状，指出其在轨道交通场景的研究热点。结果表明，未来5G的多种关键技术将会渗透到轨道交通系统中的各项应用中，包括列车控制、乘客娱乐、高清视频、设备监测等，为实现轨道交通的智能升级提供有力的支撑。

Fifth-generation (5G) Key Technologies of Rail Transit Scenario

Based on the overview of three core use cases, standard organization and standardization of the fifth-generation (5G) mobile communications system, this paper focuses on the three key 5G technologies: massive MIMO, millimeter wave, and non-orthogonal multiple access. The underlying principles and relevant research situations in China are briefly described. The paper also demonstrates the application and research status of these three technologies, and identifies research hotspots in the rail transit scenario. Additionally, this paper discusses the manner in which several upcoming 5G key technologies will penetrate into various applications in the rail transit system, including train control, passenger entertainment, high-definition video, equipment monitoring, etc., which provides powerful support for the need of intelligent upgradation of existing rail transits.