小波处理下的电磁环境仿真加速方法效果对比

Effect Comparison of the Electromagnetic Environment Simulation Acceleration Method Based on Wavelet Transform

为了减少复杂电磁环境的仿真时间,在一定的精度允许的范围内,可对地形做适当的处理,以减少射线条数,换取仿真时间的缩短。本文通过小波分解,再进行中值滤波处理,以完成地形的平滑去噪处理。且为了选取最优小波基,本文采用不同小波基,对地形高程值进行小波变换和滤波处理,比较处理后的地形仿真效果,进而找出对地形做小波变换的最优小波基。

To reduce the simulation time under the complicated electromagnetic environment, it can make some appropriate treatment to the terrain in order to reduce the number of rays and in exchange for the shortened simulation time under the certain accuracy permitted range. In this paper, it carries out by wavelet decomposition, and then the process of median filter to complete the terrain smoothing and denoising. And in order to select the best wavelet, we use different wavelets to do wavelet transform and filtering to terrain elevation values and then compare the simulation results, and finally find out the optimal wavelet.