太赫兹电波传播及信道特性  

Terahertz wave propagation and channel characterization

作　　者：弋浩凡 官科[1,3] 何丹萍 艾渤 赖峥嵘[4] 钟章队 YI Haofan;GUAN Ke;HE Danping;AI Bo;LAI Zhengrong;ZHONG Zhangdui(State Key Laboratory of Rail Traffic Control and Safety,Beijing Jiaotong University,Beijing 100044,China;Beijing Engineering Research Center of High-speed Railway Broadband Mobile Communications,Beijing 100044,China;Frontiers Science Center for Smart High-speed Railway System,Beijing 100044,China;Guangdong Communications and Networks Institute,Guangzhou 510700,China)

机构地区：[1]北京交通大学轨道交通控制与安全国家重点实验室,北京100044 [2]北京市高速铁路宽带移动通信工程技术研究中心,北京100044 [3]智慧高铁系统前沿科学中心,北京100044 [4]广东省新一代通信与网络创新研究院,广东广州510700

出　　处：《通信学报》2022年第1期34-48,共15页Journal on Communications

基　　金：中央高校基本科研业务费专项资金资助项目(No.2020JBZD005);国家自然科学基金资助项目(No.61901029);北京市自然科学基金−海淀原始创新联合基金资助项目(No.L212029);轨道交通控制与安全国家重点实验室自主课题基金资助项目(No.RCS2020ZZ005)。

摘　　要：首先,综述太赫兹电波相较于低频电波传播的不同特性,包括气象因素和材料粗糙表面对电磁波的影响。接着,提出利用射线跟踪技术仅通过有限的信道测量数据校准目标场景中的三维环境模型以及材料电磁参数;然后,利用从射线跟踪仿真反演出的参数在类似场景中进行大量仿真,代替信道测量生成大量真实有效的全维度信道数据;最后,提取并分析信道特性,例如路径损耗、阴影衰落、莱斯K因子、均方根时延扩展、角度扩展及多普勒参数。2个案例研究是从室内桌面通信到室外智能车联网场景,分别代表了6G移动通信从近到远用例的两端,对于室外场景还额外考虑了不同气象条件下对信道参数的影响,对太赫兹系统的设计和评估具有重大意义。Firstly,the different characteristics of terahertz waves compared to lower frequency bands were summarized,including the influence of meteorological factors and rough surfaces of materials on THz waves.Next,it was proposed to use ray-tracing(RT)technology to calibrate the three-dimensional(3D)environment model and electromagnetic parameters of materials in the target scenarios through very limited channel measurement data.Then,the reversed parameters were utilized to perform in a similar but more general scenario,instead of a large amount of channel measurement data.Finally,the channel characteristics were analyzed by extraction of the channel key parameters,such as path loss,shadow fading,Rician K-factor,delay spread,angular spread,and doppler parameters in a mobile scenario.Representing two ends of 6G THz use cases from indoor scenario to outdoor scenario,case studies were made for wireless connections on a desktop and vehicular communications,respectively.As for the outdoor scenario,the influences of meteorological factors were additionally considered.The work is of great significance for the design and evaluation of the THz communication system.

关 键 词：信道特性 信道测量 射线跟踪 太赫兹通信 电波传播 

分 类 号：TN92[电子电信—通信与信息系统]