摘要
为用宽角抛物方程模型计算电波在复杂地形上的传播特性,在维持该模型形式的前提下,通过坐标变换,将不规则地表转换成易于采用FFT处理的平地面,在此基础上深入研究了处理复杂地形的边界平移法,给出了该方法在距离-高度二维计算域内任意距离步与任意高度处电波传播衰减计算的具体实现步骤,并通过计算电波在一个类正弦包络地形上的传播衰减情况来予以验证。计算结果表明该方法的准确性,为抛物方程模型处理复杂地形提供了一条行之有效的途径。
For calculating the propagation characteristics of radio waves on complex terrain with wide-angle parabolic equation model,the irregular surface is transformed into a flat surface which is easy to be processed by FFT through coordinate transformation under the premise of maintaining the form of this model.On this basis,in-depth research is done on the boundary shift method for complex terrain.The detailed steps for calculating the attenuation of radio wave propagation at any distance step and any height in the range-height two-dimensional computation domain are given.The method is verified by calculating the radio wave propagation attenuation on a sinusoidal envelope-like terrain.The calculation results indicate the accuracy of the method.And all this provides an effective way for the parabolic equation model in dealing with complex terrain.
作者
俞红兵
胡绘斌
储飞黄
YU Hong-bing;HU Hui-bing;CHU Fei-huang(Electronic Countermeasure Institute Of NUDT,Heifei Anhui 230000,China;Unit 94860 of PLA,Nanjing Jiangsu 210018,China)
出处
《通信技术》
2019年第3期524-528,共5页
Communications Technology
关键词
宽角
抛物方程
复杂地形
传播
边界平移
wide-angle
parabolic equation
complex terrain
propagation
boundary shift
