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高铁的迅速发展为现有的高铁无线通信系统带来了一些新的挑战.一个准确描述隧道信道特性的信道模型,对高铁通信系统的设计和评估意义重大.由于隧道狭长的空间、隧道本身的边界性以及产生的波导效应等,高铁隧道中的信道特性不同于其他的高铁场景.此外,隧道信道的一些特性目前还没有被充分地研究.因此,考虑大尺度和小尺度衰落特性的准确的隧道信道模型是十分必要和重要的.本文全面地综述了已开展的隧道信道测量及采用不同方法建模的隧道信道模型,讨论了未来高铁隧道信道测量及建模的一些研究方向.
The rapid development of high-speed rail brings some new challenges to the existing high-speed rail wireless communication system.A channel model that accurately characterizes the tunnel channel is of great significance for the design and evaluation of the high-speed rail communication system.As a result of the tunnel’s long and narrow space, Borderline and waveguide effect, the channel characteristics of HSR tunnels are different from other HSR scenarios.In addition, some characteristics of tunnel channels have not been fully studied so that considering the accuracy of large-scale and small-scale fading characteristics The tunnel channel model is very necessary and important.This paper comprehensively reviews the tunnel channel measurements and the tunnel channel models which are modeled by different methods, and discusses some research directions of the future high-speed tunnel tunnel measurement and modeling.