基于谷歌地球的二维电波传播预测
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摘要
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.
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.
引文
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[16]吴迪,刘伟峰,胡胜,等.基于LAB空间的K均值聚类彩色图像分割[J].电子科技,2017,30(10):29-32.
[17]王雪光,陈淑红.基于K均值聚类的成熟草莓图像分割算法[J].农机化研究,2013,35(6):51-54.
[2]吴彦鸿,王聪,徐灿.无线通信系统中电波传播路径损耗模型研究[J].国外电子测量技术,2009(8):35-37,41.
[3]杨晋生,董伯平,陈为刚,等.基于三维射线跟踪的信道特性可视化研究[J].电子测量技术,2011,34(12):58-61.
[4]DONOHUE D J,KUTTLER J R.Propagation modeling over terrain using the parabolic wave equation[J].Antennas and Propagation,2000,48(2):260-277.
[5]白瑞杰,廖成,盛楠,等.基于数字地图的二维电波传播问题仿真[J].强激光与粒子束,2014,26(7):197-200.
[6]侯松高.基于数字地图的电波传播特性预测方法[J].无线电通信技术,2017,43(4):80-82,95.
[7]方昆,邱小波,金宏斌.基于Google Earth影像地图数据获取的研究[J].信息技术,2014(4):96-99.
[8]WEN Y C H,CHANG F Y,WEN Y H,et al.Measurements and modeling of wave propagation over irregular terrain for signals in the vhf band[J].Journal of the Chinese Institute of Engineers,2005,28(3):401-412.
[9]SHENG N,ZHONG X M,ZHANG Q,et al.Study of parabolic equation method for millimeter-wave attenuation in complex meteorological environments[J].Progress in Electromagnetics Research M,2016,48:173-181.
[10]侯松高.基于数字地图的电波传播特性预测方法[J].无线电通信技术,2017,43(4):80-82,95.
[11]潘俊华,戴文新,史珂.GOOGLE EARTH在昆明市卫星定位综合服务系统中的应用[J].地矿测绘,2013,29(3):37-39.
[12]李小红,武敬飞,张国富,等.结合分水岭和区域合并的彩色图像分割[J].电子测量与仪器学报,2013,27(3):247-252.
[13]王星,宗凯.基于局部熵的图像分割算法研究与实现[J].电子测量技术,2016,39(12):168-171.
[14]陶强,刘莉.基于双区域演化水平集的图像分割方法[J].电子测量技术,2016,39(9):91-95,107.
[15]李金涛,艾萍,岳兆新,等.基于K-MEANS聚类算法的改进[J].国外电子测量技术,2017,36(6):9-13,21.
[16]吴迪,刘伟峰,胡胜,等.基于LAB空间的K均值聚类彩色图像分割[J].电子科技,2017,30(10):29-32.
[17]王雪光,陈淑红.基于K均值聚类的成熟草莓图像分割算法[J].农机化研究,2013,35(6):51-54.