Towards 6G: Paradigm of Realistic Terahertz Channel Modeling  

作　　者：Ke Guan Haofan Yi Danping He Bo Ai Zhangdui Zhong 

机构地区：[1]State Key Laboratory of Rail Traffic Control and Safety,Beijing Jiaotong University,Beijing 100044,China [2]Beijing Engineering Research Center of High-speed Railway Broadband Mobile Communications,Beijing 100044,China

出　　处：《China Communications》2021年第5期1-18,共18页中国通信（英文版）

基　　金：supported by the Fundamental Research Funds for the Central Universities 2020JBZD005;NSFC under Grant(61771036,61901029,U1834210,and 61725101);the State Key Laboratory of Rail Traffic Control and Safety(Contract No.RCS2020ZZ005);Beijing Jiaotong University;the ZTE Corporation;State Key Laboratory of Mobile Network and Mobile Multimedia Technology;Beijing Natural Science Foundation under Grant L201023。

摘　　要：Terahertz(THz)communications are envisioned as a key technology for the sixth-generation wireless communication system(6G).However,it is not practical to perform large-scale channel measurements with high degrees of freedom at THz frequency band.This makes empirical or stochastic modeling approaches relying on measurements no longer stand.In order to break through the bottleneck of scarce fulldimensional channel sounding measurements,this paper presents a novel paradigm for THz channel modeling towards 6G.With the core of high-performance ray tracing(RT),the presented paradigm requires merely quite limited channel sounding to calibrate the geometry and material electromagnetic(EM)properties of the three-dimensional(3D)environment model in the target scenarios.Then,through extensive RT simulations,the parameters extracted from RT simulations can be fed into either ray-based novel stochastic channel models or cluster-based standard channel model families.Verified by RT simulations,these models can generate realistic channels that are valuable for the design and evaluation of THz systems.Representing two ends of 6G THz use cases from microscopy to macroscopy,case studies are made for close-proximity communications,wireless connections on a desktop,and smart rail mobility,respectively.Last but not least,new concerns on channel modeling resulting from distinguishing features of THz wave are discussed regarding propagation,antenna array,and device aspects,respectively.

关 键 词：channel modeling channel sounding RAYTRACING THz communication 6G 

分 类 号：TN929.5[电子电信—通信与信息系统]