级联隧道环境多频段路径损耗模型  

Path Loss Model for Multiple Frequency Bands in Cascaded Tunnel Environment

作　　者：钱竞元 崔科 赵恒凯[1] 郑国莘[1] Qian Jingyuan

机构地区：[1]上海大学特种光纤与光接入网重点实验室,特种光纤与先进通信国际合作联合实验室,上海200444 [2]卡斯柯信号有限公司,上海200436

出　　处：《工业控制计算机》2022年第10期53-56,共4页Industrial Control Computer

基　　金：国家自然科学基金(61871261);上海市自然科学基金(22ZR1422200)。

摘　　要：隧道场景往往是直隧道与弯隧道相级联的,对级联隧道的信道建模是非常复杂的。因此,在直隧道和弯隧道信道模型的基础上,寻求两种隧道级联场景下的信道规律。基于波导理论和弹跳射线法原理,发现了远场中额外损耗与弯曲隧道中的传播距离成正比,并提出了额外损耗系数。基于Wireless Insite分别对2.6 GHz、3.5 GHz和5.6 GHz频段在不同曲率半径的级联隧道中进行仿真,确定了额外损耗系数与曲率半径之间的经验公式。最后,通过仿真验证了该模型的准确性。Subway tunnels are usually cascaded with straight tunnel and curved tunnel. It is very complicated to establish pathloss models for various cascaded tunnels. This paper finds the pathloss model of cascaded tunnel based on the propagation mechanisms of straight tunnel and curved tunnel. Combining the waveguide mode and the method of shooting and bouncing ray, it is found that the extra loss in the far-field region is proportional to the propagation distance in the curvature, and the extra loss coefficient is proposed in this paper. Then, the 2.6 GHz, 3.5 GHz, and 5.6 GHz frequency bands are simulated in cascaded tunnels with different curvature by Wireless Insite, and the empirical formula between the extra loss coefficient and the radius is determined. Finally, the accuracy of the model is verified by simulation.

关 键 词：级联隧道 波导理论 弹跳射线法 额外损耗 额外损耗系数 

分 类 号：U231.7[交通运输工程—道路与铁道工程]