拐角场景太赫兹信道传输及物理层安全特性研究

Terahertz channel propagation and physical layer security characteristics in corner scenarios

摘要:

随着6G网络的发展，深入研究城市环境中太赫兹信道的传播特性对于设计高效、可靠、安全的通信系统至关重要。本文通过理论分析、数值仿真和实验测量相结合的方法，系统地研究了不同类型建筑拐角(包括锐角、直角、钝角和弧形)对太赫兹信道传输及其物理层安全的影响。实验采用了太赫兹信道测量系统，在140 GHz、225 GHz和320 GHz三个频率下进行测量，并使用数值仿真和刀口衍射模型进行理论分析。研究结果揭示了拐角结构对太赫兹波传播的影响，包括衍射和反射现象，以及频率变化对这些现象的影响。该项工作为太赫兹通信系统在城市环境中的部署提供了理论指导。

Abstract:

With the development of 6G networks, in-depth research on the propagation characteristics of terahertz(THz) channels in urban environments is crucial for designing efficient, reliable, and secure communication systems. The impact of different types of building corners (including acute, right, obtuse, and curved angles) on the transmission of THz channels and their physical layer security are systematically investigated through a combination of theoretical analysis, numerical simulation, and experimental measurement. The experiments are conducted by using a THz channel measurement system at three frequencies: 140 GHz, 225 GHz, and 320 GHz. Theoretical analysis is performed by using numerical simulations and knife-edge diffraction models. The research findings reveal the effects of corner structures on the propagation of THz waves, including diffraction and reflection phenomena, as well as the impact of frequency variations on these phenomena. This work provides theoretical guidance for the deployment of THz communication systems in urban environments.