典型高铁线路城区场景多径能量分布研究  

Research on Multipath Energy Distribution in Typical Urban Scenarios of High-speed Rail Line

作　　者：刘立海[1] 王鹏飞[2] 李津汉 官科[2] 安昊 LIU Lihai;WANG Pengfei;LI Jinhan;GUAN Ke;AN Hao

机构地区：[1]中铁第四勘察设计院集团有限公司通号院,武汉430063 [2]北京交通大学先进轨道自主运行全国重点实验室,宽带移动信息通信铁路行业重点实验室,北京100044

出　　处：《铁道通信信号》2024年第6期1-7,共7页Railway Signalling & Communication

基　　金：中国国家铁路集团有限公司科技研究开发计划(N2023G052);中铁第四勘察设计院集团有限公司科技研究开发计划(2021K045)。

摘　　要：在高铁列车运行场景中,研究多径能量分布有助于设计、优化无线通信系统。利用射线跟踪技术,在5G-R系统2.1GHz频段开展无线信道仿真研究,从射线跟踪计算结果中分类统计不同类型地物多径能量,对典型高铁线路城区场景的空间域特征和多径能量分布进行分析。研究表明:在密集城区高架桥场景下,多径能量的来源主要是结构模型、城市开阔区域反射体和建筑物,其分别占据总能量的58%、32%和10%,其余绿地等地物类型产生的多径能量可以忽略不计;而在开阔城区场景下,绿地产生的多径能量占比为14%,远高于密集城区场景下的1%,因此不能忽略绿地等地物类型的影响。该研究成果对射线跟踪技术在场景建模方面的轻量化处理具有参考价值,可为高速铁路5G-R的设计和优化提供技术支撑。It is helpful to study the multipath energy distribution in the high-speed train operation scenarios for designing and optimizing the wireless communication system.The wireless channel simulation is carried out in 5G-R 2.1 GHz frequency band by applying the ray tracing technology.By classifying and statistically analyzing the multipath energy of different types of ground objects from the results of ray tracing calculations,the spatial characteristics and multipath energy distribution in typical urban scenarios of high-speed rail line are analyzed.The results show that in the dense urban viaduct scenario,the sources of multipath energy are mainly included such as structure models,reflector at urban open areas,and buildings,which occupy 58%,32%,and 10%of the total energy respectively.The rest of the feature types such as green areas produce negligible multipath energy.In the open urban area scenario,the green aneas produces 14%of the multipath energy,which is much higher than the 1%in the dense urban area scenario.Therefore,the influence of feature types such as green areas can not be ignored.The research results have reference value for the lightweight treatment of ray tracing technology in scenarios modeling,provide technical support for the design and optimization of 5G-R mobile communication networks for high-speed rail way.

关 键 词：无线通信 铁路5G专用移动通信 射线跟踪 多径能量分布 场景建模 

分 类 号：TN92[电子电信—通信与信息系统]