面向6G的太赫兹信道反射特性研究

doi:10.11959/j.issn.1000-436x.2022102

通信学报 ›› 2022, Vol. 43 ›› Issue (5): 102-109.doi: 10.11959/j.issn.1000-436x.2022102

面向6G的太赫兹信道反射特性研究

唐盼¹, 林佳欣¹, 张建华¹, 田磊¹, 常钊玮¹, 夏亮², 王启星²

¹ 北京邮电大学网络与交换技术国家重点实验室，北京 100876
² 中国移动研究院未来研究院，北京 100053

修回日期:2022-01-16 出版日期:2022-05-25 发布日期:2022-05-01
作者简介:唐盼（1991- ），男，湖南衡阳人，博士，北京邮电大学特聘副研究员，主要研究方向为毫米波、太赫兹和可见光信道测量与建模
作林佳欣（1999- ），女，甘肃兰州人，北京邮电大学硕士生，主要研究方向为太赫兹信道建模。者简介
张建华（1976- ），女，河北迁安人，博士，北京邮电大学教授、博士生导师，主要研究方向为5G和6G传输技术、智能信道建模、毫米波和太赫兹信道建模、信道模拟器等
田磊（1986- ），男，河北宁晋人，博士，北京邮电大学副教授、硕士生导师，主要研究方向为无线宽带信道和 MIMO 信道测量方法、信道参数估计、信道特性建模以及无线信道建模
常钊玮（1998- ），男，河北邯郸人，北京邮电大学博士生，主要研究方向为太赫兹信道测量与建模
夏亮（1982- ），男，山东潍坊人，中国移动研究院高级工程师，主要研究方向为毫米波、太赫兹和可见光通信
王启星（1980- ），男，广东惠州人，博士，中国移动研究院高级工程师，主要研究方向为5G和6G先进技术
基金资助:
国家自然科学基金资助项目(62031019);国家自然科学基金资助项目(62101069);国家自然科学基金杰出青年基金资助项目(61925102);国家重点研发计划基金资助项目(2020YFB1805002);北京邮电大学-中国移动研究院联合创新中心基金资助项目(CMYJY-202000276)

Research on reflection characteristics of the terahertz channel for 6G

Pan TANG¹, Jiaxin LIN¹, Jianhua ZHANG¹, Lei TIAN¹, Zhaowei CHANG¹, Liang XIA², Qixing WANG²

¹ State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China
² Future Research Institute, China Mobile Research Institute, Beijing 100053, China

Revised:2022-01-16 Online:2022-05-25 Published:2022-05-01
Supported by:
The National Natural Science Foundation of China(62031019);The National Natural Science Foundation of China(62101069);The National Natural Science Fund for Distinguished Young Scholars of China(61925102);The National Key Research and Development Program of China(2020YFB1805002);Beijing University of Posts and Telecommunications-China Mobile Research Institute Joint Innovation Center Item(CMYJY-202000276)

摘要/Abstract

摘要：

太赫兹信道反射特性对于认知、掌握太赫兹信道传播机理，以及建立面向6G的高精度太赫兹信道模型至关重要。为此，首先，综述了太赫兹信道反射特性在理论建模和实测分析两方面的研究现状。接着，针对5种常见建筑材料，利用基于时域相关原理的太赫兹信道测量平台开展了240～310 GHz频率范围的反射系数测量，并发现了反射系数依赖于电磁波的入射角。然后，参考Rayleigh反射系数理论模型，提出了入射角依赖的反射系数统计性模型，该模型能准确刻画反射系数随角度的变化规律。最后，展望了太赫兹信道反射特性的研究方向。

关键词: 6G, 太赫兹, 信道特性, 信道测量, 反射特性, 反射系数

Abstract:

The reflection characteristics of the terahertz channel are crucial for understanding and mastering the propagation mechanism of the terahertz channel, which are also required for a high-precision terahertz channel model for 6G.Therefore, the research status of terahertz channel reflection characteristics in theoretical modeling and measurement analysis were first summarized.Then, the reflection coefficient measurement campaign in the frequency range of 240 GHz to 310 GHz for five kinds of common building materials was conducted by a time-domain correlation-based terahertz channel measurement platform.It was found that the reflection coefficients were related to the incident angle.Based on the Rayleigh reflection coefficient theoretical model, a statistical reflection coefficient model was further proposed as a function of incident angle.Generally, the proposed model could accurately describe the variation law of the reflection coefficient with angle.Finally, research directions of terahertz channel reflection characteristics were discussed.

Key words: 6G, terahertz, channel characteristic, channel measurement, reflection characteristic, reflection coefficient

中图分类号:

TN92

唐盼, 林佳欣, 张建华, 田磊, 常钊玮, 夏亮, 王启星. 面向6G的太赫兹信道反射特性研究[J]. 通信学报, 2022, 43(5): 102-109.

Pan TANG, Jiaxin LIN, Jianhua ZHANG, Lei TIAN, Zhaowei CHANG, Liang XIA, Qixing WANG. Research on reflection characteristics of the terahertz channel for 6G[J]. Journal on Communications, 2022, 43(5): 102-109.

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参考文献 26

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测量平台	适用频率	可达带宽	动态范围	测量距离
THz-TDS	100 GHz～10 THz	极高（几THz）	低（小于50 dB）	短（几米）
VNA	约100～350 GHz	高（110 GHz）	高（60～90 dB）	中等（几十米，利用光纤无线电可扩展至100 m）
基于相关的测量平台	约100～300 GHz	低（几 GHz）	高（145 dB）	长（几十米）

参考文献	测量平台	频率范围/GHz	入射角范围	入射波极化类型	被测样本
文献[11]	THz-TDS	70～350	20°～75°	TE、TM	玻璃、石膏、木板
文献[15]	THz-TDS	100～1 000	25°～70°	TE、TM	石膏混凝土、嵌纹墙纸覆盖的纸板
文献[18]	THz-TDS	100～500	25°～60°	TE、TM	双层玻璃、白色油漆覆盖的石膏
文献[19]	VNA	110～135	20°～60°	TE、TM	双层玻璃、石膏、混凝土、中纤板
文献[16]	VNA	750～1 100	0°	TE/TM	木板、砖、塑料
文献[20]	VNA	270～330	—	—	玻璃、纸、木板、塑料
文献[21]	基于相关的测量平台	28～140	10°～80°	TE	干墙
文献[22]	基于相关的测量平台	253	10°～80°	TE、TM	木板、混凝土、金属
注：—表示文献中未提及

参数	数值
最小中心频率/GHz	240
最大中心频率/GHz	310
中心频率间隔/GHz	10
带宽/GHz	2
天线极化类型（波极化类型）	垂直极化（TE）
最小入射角	10°
最大入射角	80°
入射角间隔	10°

频率/GHz	玻璃				瓷砖				木板				石膏				铝合金
频率/GHz	a	b	c	RMSE	a	b	c	RMSE	a	b	c	RMSE	a	b	c	RMSE	a	b	c	RMSE
240	-9.506	3.277	-1.407	0.119	-6.504	5.877	-4.134	0.083	-6.576	2.291	-3.126	0.117	-7.249	1.543	-3.888	0.070	-7.949	61.730	-0.748	0.120
250	-9.100	3.410	-2.389	0.101	-8.693	3.761	-4.457	0.113	-7.494	2.076	-3.868	0.096	-7.352	1.363	-4.012	0.080	-6.638	44.190	-0.423	0.164
260	-9.771	1.665	-4.170	0.153	-6.079	2.308	-4.088	0.124	-7.613	1.691	-4.064	0.096	-7.277	1.206	-4.385	0.097	-9.674	14.930	-1.904	0.148
270	-8.786	3.007	-4.711	0.094	-8.397	3.948	-4.433	0.115	-8.116	2.092	-3.531	0.090	-7.443	1.471	-4.083	0.087	-9.964	170.300	-2.651	0.204
280	-8.694	2.228	-4.147	0.132	-9.639	3.421	-2.180	0.174	-7.677	1.690	-3.777	0.099	-7.651	1.305	-4.171	0.109	-7.212	16.110	-1.507	0.201
290	-9.183	2.606	-3.527	0.111	-8.743	2.980	-4.215	0.173	-6.619	1.745	-3.574	0.129	-8.401	1.445	-4.369	0.104	-9.556	32.500	-2.309	0.176
300	-8.288	2.124	-3.995	0.145	-8.670	2.943	-2.013	0.099	-7.883	1.826	-3.699	0.105	-7.595	1.347	-4.141	0.095	-7.408	12.970	-2.098	0.222
310	-8.588	3.563	-2.119	0.097	-8.168	5.228	-1.558	0.117	-6.537	2.481	-2.885	0.088	-7.828	1.578	-3.888	0.120	-13.250	536.500	-2.114	0.125

面向6G的太赫兹信道反射特性研究

Research on reflection characteristics of the terahertz channel for 6G

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