太赫兹电波传播及信道特性

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

Abstract

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

CLC Number:

TN92

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.

Figures/Tables 18

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

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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

Terahertz wave propagation and channel characterization

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