基于5G-R系统的高铁站台场景信道特性

Channel characteristics of high-speed rail platform scenario based on 5G for railway system

为推进智能铁路总体建设,实现高速铁路智能化,高铁信息基础设施将应用第五代移动通信技术(5G)建设铁路5G专用移动通信系统,2.1 GHz有望成为铁路5G专用移动通信系统的承载频段。高铁站台作为客货乘降与调度中转的功能核心,其在2.1 GHz下的电波传播特性亟待研究。本文以厦门北站高铁站台为研究场景,利用射线跟踪(RT)技术仿真2.1 GHz频段下的电波传播,基于仿真结果分析此场景无线信道特性,包括均方根时延扩展(RMS DS)、到达/离开方位角扩展、到达/离开俯仰角扩展(ASA/ASD, ESA/ESD)、交叉极化比(XPR)和以上参数的互相关。根据以上结果,对高铁站台场景中铁路5G专用移动通信系统的设计和评估提出相关建议。

In order to promote the overall construction of the intelligent railway and to realize the intelligent high-speed railway,the communication infrastructure of high-speed railway will apply the 5th Generation Mobile Communication Technology(5G)to build the 5G for railway system.2.1 GHz band is expected to be the bearer band for the 5G for railway system.The high-speed rail platform is the functional core of the loading and discharging of passengers and the cargo,and its propagation characteristics at 2.1 GHz need to be studied urgently.The wireless channel in the high-speed rail platform of Xiamen North Station at 2.1 GHz is characterized through Ray-Tracing(RT)simulations.Based on the simulation results,the channel parameters in the high-speed rail platform scenario are analyzed,including Root-Mean-Square Delay Spread(RMS DS),azimuth angular spread of arrival/departure,elevation angular spread of arrival/departure(ASA/ASD,ESA/ESD),Cross-Polarization Ratio(XPR)and cross-correlations of the above parameters.Based on these results,relevant suggestions are provided for the design and evaluation of the 5G for railway system in the high-speed rail platform scenario.