基于数字地图的二维电波传播问题仿真  

Two-dimensional electromagnetic environment simulation based on digital map

作　　者：白瑞杰 廖成[1] 盛楠[1] 张青洪[1] 李瀚宇[2] 周海京[2] 

机构地区：[1]西南交通大学电磁所,成都610031 [2]北京应用物理与计算数学研究所,北京100094

出　　处：《强激光与粒子束》2014年第7期191-194,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金委-中国工程物理研究院联合基金项目(U1330109);中国工程物理研究院复杂电磁环境实验室课题

摘　　要：为快速预测二维地理环境下的电磁环境特性,应用二维抛物方程模型对电磁环境进行仿真。为了得到真实有效的地形数据,研究了从GeoTiff中抽取网格点上地理信息的方法,并利用双线性插值法计算了任意位置处的高程值。同时研究了地球表面两点之间计算距离的方法,将该方法的计算结果与GIS软件结果进行对比,验证了该方法的可靠性。在标准大气环境下,利用二维抛物方程模型仿真分析了不同距离处不同高度的电波传播传播因子的变化情况,为预测真实地理环境中的电波传播特性提供了一种有效的方法。To quickly predict the characteristic of the electromagnetic environment in two-dimensional terrain environment,this paper uses the two-dimensional parabolic equation model to simulate the electromagnetic environment.In order to get the real and effective terrain information,this paper studies the method to extract the grids’ terrain information from the GeoTiff,then uses the bilinear interpolation method to obtain the elevation value of the arbitrary location on the terrain profile.The calculation method of distance between two points on the Earth’s surface is also studied,and the results obtained by this method are compared with those obtained by the GIS software,which verifies the accuracy of the method.In the standard atmosphere condition,this paper uses the two-dimensional parabolic equation model to simulate and analyze the variation of the radio wave propagation factor with height in different distance and offers an efficient method to predict the characteristics of the wave propagation in the real terrain environment.

关 键 词：SRTM数据 电磁环境 抛物方程模型 电波传播 传播损耗 

分 类 号：TN011[电子电信—物理电子学]