基于谷歌地球的二维电波传播预测

Two-diemensional electromagnetic environment simulation based on Google Earth

准确地预测复杂环境中电波传播特性能够为基站选址、网络规划等提供有效的工程指导。为了更加方便准确地预测实际地理环境中的电波传播特性,提出了一种基于谷歌地球的抛物方程仿真方法。从谷歌地球中提取高分辨率的卫星影像数据,通过聚类算法对地理影像进行了分割,实现了地表覆盖媒质的分类,结合其对应高程数据对地理电磁环境进行了建模,最后采用抛物方程方法对区域中电波传播特性进行了仿真预测分析。相较于传统的基于数字高程模型的电磁建模方法,该方法能够考虑到地表覆盖媒质对电波传播特性的影响,实现较为简便,具有较大的工程应用价值。

Accurate prediction of the characteristics of wave propagation in complex environment can provide effective engineering guidance for site selection and network planning.In order to predict the characteristics of the wave propagation in the actual geographic environment conveniently and accurately,a simulation method of parabolic equation based on Google earth is proposed in this paper.Extracting the high resolution satellite images from Google earth,using the clustering algorithm for Geographic Image segmentation to achieve the classification of the surface coverage medium.The model of geographic electromagnetic environment combined with its corresponding elevation data,the wave propagation characteristics in the area are simulated by using the parabolic equation method for prediction and analysis.Compared with the traditional electromagnetic modeling method based on DEM data,the method can analyze the influence of surface covering medium on the propagation characteristics of radio waves.It＇s simple and has great engineering application value.