太赫兹电波传播及信道特性

doi:10.11959/j.issn.1000-436x.2022013

通信学报 ›› 2022, Vol. 43 ›› Issue (1): 34-48.doi: 10.11959/j.issn.1000-436x.2022013

• 专题：太赫兹通信关键技术 • 上一篇下一篇

太赫兹电波传播及信道特性

弋浩凡¹^,², 官科¹^,³, 何丹萍¹^,³, 艾渤¹^,³, 赖峥嵘⁴, 钟章队¹^,³

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

修回日期:2022-01-06 出版日期:2022-01-25 发布日期:2022-01-01
作者简介:弋浩凡（1993- ），女，陕西咸阳人，北京交通大学博士生，主要研究方向为太赫兹电波传播机制与太赫兹信道建模
官科（1983- ），男，云南昆明人，博士，北京交通大学教授、博士生导师，主要研究方向为电波传播与无线信道测量、仿真与建模，毫米波与太赫兹通信技术，高性能射线跟踪仿真技术与平台
何丹萍（1985- ），女，广西鹿寨人，博士，北京交通大学副教授、硕士生导师，主要研究方向为射线跟踪技术、毫米波与太赫兹信道研究、通感一体化等
艾渤（1974- ），男，陕西西安人，博士，北京交通大学教授、博士生导师，主要研究方向为宽带移动通信与轨道交通专用移动通信
赖峥嵘（1971- ），男，四川南充人，广东省新一代通信与网络创新研究院研发总工、无线6G中心研究主任，主要研究方向为6G热点候选技术、太赫兹通信、6G愿景和网络
钟章队（1962- ），男，湖南衡阳人，北京交通大学教授、博士生导师，主要研究方向为宽带移动通信系统与专用移动通信
基金资助:
中央高校基本科研业务费专项资金资助项目(2020JBZD005);国家自然科学基金资助项目(61901029);北京市自然科学基金-海淀原始创新联合基金资助项目(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(RCS2020ZZ005)

Terahertz wave propagation and channel characterization

Haofan YI¹^,², Ke GUAN¹^,³, Danping HE¹^,³, Bo AI¹^,³, Zhengrong LAI⁴, Zhangdui ZHONG¹^,³

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
³ Frontiers Science Center for Smart High-speed Railway System, Beijing 100044, China
⁴ Guangdong Communications and Networks Institute, Guangzhou 510700, China

Revised:2022-01-06 Online:2022-01-25 Published:2022-01-01
Supported by:
The Fundamental Research Funds for the Central Universities(2020JBZD005);The National Natural Science Foundation of China(61901029);The Beijing Natural Science Foundation(L212029);The State Key Laboratory of Rail Traffic Control and Safety(RCS2020ZZ005)

摘要/Abstract

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。

关键词: 信道特性, 信道测量, 射线跟踪, 太赫兹通信, 电波传播

Abstract:

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.

Key words: channel characterization, channel sounding, ray-tracing, THz communication, wave propagation

中图分类号:

TN92

弋浩凡, 官科, 何丹萍, 艾渤, 赖峥嵘, 钟章队. 太赫兹电波传播及信道特性[J]. 通信学报, 2022, 43(1): 34-48.

Haofan YI, Ke GUAN, Danping HE, Bo AI, Zhengrong LAI, Zhangdui ZHONG. Terahertz wave propagation and channel characterization[J]. Journal on Communications, 2022, 43(1): 34-48.

图/表 18

图1

图2

图3

图4

图5

图6

图7

图8

图9

图10

图11

图12

图13

表1

表2

RT仿真中不同材料的电磁参数"

材料名称	$ε^{'}$	$ε^{″}$	S	α
金属	1.000	1.0×10⁷	0	0
砖块	3.026	0.159	0.001 5	40
玻璃	6.760	0.442	0.003 0	9

表2

图14

表3

表4

参考文献 49

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参数	μ	σ
KF/dB	1.26	3.75
DS/ns	0.74	0.02
ASD	74.66°	0.47°
ESD	12.12°	3.91°
ASA	74.66°	0.47°
ESA	12.12°	3.91°
XPR/dB	8.41	4.34

参数	RT	大气	雾	雨	雪
A	20.44	25.82	27.11	42.01	215.40
B	80.36	68.94	68.13	42.75	-288.92
σ_SF	4.24	5.06	10.42	4.70	4.14
μ_KF/dB	5.25	5.33	5.44	5.96	6.84
σ_KF/dB	6.33	6.02	5.59	5.72	6.13
μ_DS/ns	9.67	9.57	9.44	9.08	5.95
σ_DS/ns	13.77	13.44	13.03	11.90	5.53
μ_ASA	56.78°	56.39°	55.89°	54.41°	36.42°
σ_ASA	64.81°	64.43°	63.95°	62.66°	44.06°
μ_ASD	40.11°	40.09°	40.07°	39.99°	38.99°
σ_ASD	5.16°	5.15°	5.14°	5.12°	5.03°
μ_ESA	0.57°	0.56°	0.56°	0.56°	0.56°
σ_ESA	0.85°	0.85°	0.85°	0.85°	0.85°
μ_ESD	0.37°	0.37°	0.37°	0.37°	0.36°
σ_ESD	0.56°	0.56°	0.56°	0.55°	0.55°

参数	μ_ν/kHz	σ_ν/kHz
参数	μ_ν/kHz	RT	大气	雾	雨	雪
最大值	16.88	7.07	7.01	7.00	6.82	4.04
均值	16.52	0.45	0.45	0.44	0.41	0.18
最小值	10.05	2.11×10^-5	2.11×10^-5	2.11×10^-5	2.10×10^-5	2.03×10^-5

太赫兹电波传播及信道特性

Terahertz wave propagation and channel characterization

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