Complete Propagation Model in Tunnels
Complete Propagation Model in Tunnels
复制标题
隧道中的完整传播模型
DOI：
10.1109/lawp.2013.2270937
复制
发表时间：
2013-01-01
影响因子：
4.2
通讯作者：
Briso-Rodriguez, Cesar
中科院分区：
文献类型：
--
作者：
Guan, Ke;Zhong, Zhangdui;Briso-Rodriguez, Cesar
隧道中的波传播不仅取决于载波频率和隧道的性质，而且还随发射器（Tx）和接收器（Rx）之间的距离沿着不同。这封信提出了一个完整的结构和模型在隧道中传播。与现有模型相比，完整模型统一了不同的学术观点，揭示了所有可能的传播机制，并定位了每两个相邻传播机制区之间的所有分界点。当用户靠近发射端时，传播由自由空间机制主导，然后建立多模机制。之后，当高阶模已经大大衰减时，基模引导传播占主导地位。最后，当用户非常远时，由于反射光线的衰减，波导效应消失。测量和仿真验证了模型。这种完整的结构和模型对于全面了解隧道中的传播是必不可少的，并且可以应用于先进通信系统的网络规划和干扰分析。
The wave propagation in tunnels does not only depend on the carrier frequency and properties of the tunnel, but also differs along with the distance between transmitter (Tx) and receiver (Rx). This letter presents a complete structure and model for propagation in tunnels. Compared to existing models, the complete model unifies different academic viewpoints, reveals all possible propagation mechanisms, and localizes all the dividing points between every two adjacent propagation mechanism zones. When the user is close to the Tx, the propagation is dominated by the free-space mechanism, then the multimode mechanism is established. Afterwards, when the high-order modes have been largely attenuated, the fundamental-mode guided propagation is dominant. Finally, when the user is extremely far away, the waveguide effect vanishes because of attenuation of reflected rays. Measurements and simulations validate the model. This complete structure and model can be essential to establish a comprehensive understanding of the propagation in tunnels and can be applied for network planning and interference analysis of advanced communication systems.