一种部分森林覆盖环境电波传播特性预测方法

针对部分森林覆盖环境中传播媒介的非均匀性,提出一种基于动态网格的抛物方程(PE)预测方法,该方法采用宽角PE法进行大区域电波传播特性预测。为平衡PE求解的准确性与时效性,引入动态网格技术。通过仿真算例,探讨了基于动态网格的PE法在部分森林覆盖环境电波传播特性预测中的有效性。结果表明:在计算精度相似的情况下,相对于均匀细网格,动态网格会大大减少PE所需的计算时间;而相比均匀粗网格,动态网格具有更高的计算精度。

A Method of Wave Propagation in Partly Forest Environment

The parabolic equation method based on dynamic grid was proposed for the medium which was inhomogeneousin partly forest environments. The wide angle parabolic equation method was used to predict the wave propagation. The dy.namic grid technology was introduced to solve the accuracy and timeliness of parabolic equation solution. By simulations,the efficiency of the new method in partly forest environments was discussed. The results showed that the parabolic equa.tion based on dynamic grid could reduce the computational time greatly compared with the uniform fine grid in the case ofsimilar accuracy, and could have higher accuracy compared with the uniform coarse grid.