室内单载波太赫兹无线信号传播及覆盖性能分析

doi:10.11959/j.issn.1000-436x.2022014

通信学报 ›› 2022, Vol. 43 ›› Issue (1): 24-33.doi: 10.11959/j.issn.1000-436x.2022014

• 专题：太赫兹通信关键技术 • 上一篇下一篇

室内单载波太赫兹无线信号传播及覆盖性能分析

彭木根, 杨闯, 周天航

北京邮电大学网络与交换技术国家重点实验室，北京 100876

修回日期:2021-12-01 出版日期:2022-01-25 发布日期:2022-01-01
作者简介:彭木根（1978- ），男，江西吉安人，博士，北京邮电大学教授、博士生导师，主要研究方向为 6G 无线组网、雾无线网络和智慧物联网等
杨闯（1992- ），男，河北丰润人，北京邮电大学在站博士后，主要研究方向为太赫兹电磁参数测量、太赫兹信道建模、太赫兹通信探测一体化
周天航（1998- ），男，河北遵化人，北京邮电大学硕士生，主要研究方向为太赫兹通信探测一体化
基金资助:
国家自然科学基金资助项目(61925101);国家自然科学基金资助项目(62101059);河北省重点研发计划基金资助项目(21310201D)

Analysis of propagation and coverage performance of indoor single-carrier radio signals in the terahertz bands

Mugen PENG, Chuang YANG, Tianhang ZHOU

State Key Laboratory of Networking and Switching Technology, Beijing University of Post and Telecommunications, Beijing 100876, China

Revised:2021-12-01 Online:2022-01-25 Published:2022-01-01
Supported by:
The National Natural Science Foundation of China(61925101);The National Natural Science Foundation of China(62101059);The Natural Key Research and Development Program of Hebei Province(21310201D)

摘要/Abstract

摘要：

针对太赫兹无线信号与传统频谱的差异性制约其应用于室内通信场景的问题，提出了一种室内太赫兹无线信号传播的修正模型，并分析了宽带单载波太赫兹无线信号传播及覆盖性能。具体地，考虑障碍物厚度导致的吸收损耗问题，建立了宽带太赫兹信道传递函数模型。基于射线追踪技术，阐明了障碍物厚度、信号带宽对上述性能的影响。研究表明，非视距障碍物反射可增强覆盖。此外，太赫兹通信存在覆盖范围与容量性能间的均衡问题，且理论频谱效率随太赫兹载频升高而下降。

关键词: 太赫兹, 传播, 带宽, 单载波, 覆盖

Abstract:

To tackle the problem that radio signal in the terahertz band had different features compared to that in the conventional spectrum, which restricted its application to indoor communication scenarios, a modified propagation model of terahertz radio signal was proposed.Based on the model, the propagation and coverage performances of wide-band single-carrier terahertz radio signal were analyzed.In particular, the wide-band terahertz channel transfer function was constructed, taking the absorption loss introduced by the thickness of the obstacles into account.Using the ray tracing technique, the impacts of the obstacles’ thickness and the bandwidth on the propagation and coverage performances were examined, showing that the coverage performance can be improved by leveraging the reflections from the non-line-of-sight obstacles.Moreover, the trade-off between the coverage radius and the capacity of terahertz communications is revealed, and it is further found that the theoretical spectral efficiency decreases as the carrier frequency of terahertz radio signal increases.

Key words: terahertz, propagation, bandwidth, single-carrier, coverage

中图分类号:

TN92

彭木根, 杨闯, 周天航. 室内单载波太赫兹无线信号传播及覆盖性能分析[J]. 通信学报, 2022, 43(1): 24-33.

Mugen PENG, Chuang YANG, Tianhang ZHOU. Analysis of propagation and coverage performance of indoor single-carrier radio signals in the terahertz bands[J]. Journal on Communications, 2022, 43(1): 24-33.

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参数	数值
载波频率/GHz	99
入射角度	45°
介质厚度/cm	{0.2, 0.3, 0.4, 0.5}

参数	数值
发射功率/dBm	0
带宽范围/GHz	1 ～ 50
起始频率/GHz	{90,170}
截止频率/GHz	{140,220}
发射天线增益（100 GHz）/dBi	15.5
半功率波束宽度（100 GHz）	30°
发射天线增益（200 GHz）/dBi	21
半功率波束宽度（200 GHz）	13°
本底噪声/(dBm.Hz^-1)	-174
信噪比门限/dB	-5
频域采样率/GHz	512

室内单载波太赫兹无线信号传播及覆盖性能分析

Analysis of propagation and coverage performance of indoor single-carrier radio signals in the terahertz bands

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