高速铁路典型地形通信电波传输模型研究

Study on Propagation Models of Communication Radio Waves over Typical Terrains for High-speed Railways

高速铁路系统的技术重点是通信电波的无线覆盖。以理论模型为基础,采用最小标准差估计法对460 MHz通信电波在高速铁路的典型地形条件下的传播进行建模。在高速铁路的试验段测量数据的基础上,对山地、城市、桥梁、路堑和平原等常见地形的距离损耗因数β和标准差ω进行统计,获得几种地形的电波传播模型,分析参数的不同,最终得到高速铁路完整的通信电波传播模型。

Wireless coverage of communication radio wave is a technical focal point for the high-speed railway system. Based on a theoretical model, modeling was completed for the propagation of 460 MHz radio wave over typical terrains of the high-speed railways in the method of minimum standard deviation estimation. On the basis of the data measured on an experimental section of the high-speed railway, statistics was made for distance loss coefficient β and standard deviation ω for common terrains like hilly area, city, bridge, railway cutting and plain to obtain their radio wave propagation models. The difference between parameters was analyzed. Finally, a complete radio wave propagation model was obtained for the high-speed railway.