穿透高铁车厢的5G无线信道预测  

5G Wireless Channel Prediction Through High-speed Railway Carriages

作　　者：何理旭 张雪凡[1] 冯翌宸 郑国莘[1] He Lixu

机构地区：[1]上海大学特种光纤与光接入网重点实验室,上海200444

出　　处：《工业控制计算机》2023年第9期83-85,共3页Industrial Control Computer

基　　金：上海市自然科学基金(22ZR1422200)。

摘　　要：为了科学有效地完成高铁5G基站的部署,保障车内终端的良好通信,亟需建立由基站直射反射、车窗透射以及列车内到达终端的多次反射等组成的信道特性的一般性描述。讨论了以线性函数、指数函数、幂函数为基函数的路径损耗传输模型。以2.6 GHz高铁现场测试数据为基础,校准了高铁轨旁基站与车厢移动终端间基于射线跟踪法的无线信道仿真模型,确定了高铁无线信道模型的关键参数,利用实测和仿真获得的数据,选择均方根误差最小的线性函数拟合了信道大尺度衰减公式。还对无线信道小尺度特性均方根时延扩展、角度扩展进行了预测,为未来5G高铁基站的部署提供了参考。In order to scientifically and effectively complete the deployment of high-speed railway 5G base stations and ensure good communication of in-vehicle terminals,it is urgent to establish a general description of channel characteristics consisting of direct path and reflected propagation path from base stations,transmission through windows,and multiple reflections to terminals in trains.This paper discusses the path loss transmission model based on linear function,exponential function and power function.Based on the 2.6 GHz high-speed railway measurement data,the wireless channel simulation model based on the ray tracing between the high-speed railway trackside base station and the carriage mobile terminal is calibrated,and the key parameters of high-speed railway wireless channel model are determined.Using the data obtained from actual measurement and simulation.The linear function with the smallest root mean square error is selected to fit the channel large-scale attenuation formula.This paper also predicts the small-scale characteristics of the wireless channel,such as root mean square delay spread,angle spread,and channel cross-correlation,which provide a reference for the deployment of future 5G high-speed railway base stations.

关 键 词：5G 高铁 信道建模 射线跟踪法 信道特性 

分 类 号：TN929.5[电子电信—通信与信息系统] U285.21[电子电信—信息与通信工程] U270.382[交通运输工程—交通信息工程及控制]