基于分步小波变换的对流层电波传播特性和分析软件

Radio wave propagation characteristics and analysis software in troposphere based on split step wavelet method

为满足对流层无线通信系统设计和优化的需要,基于抛物型波动方程和分步小波变换,研究了对流层电波传播特性,开发了电波传播特性分析软件。首先,通过建立数值求解的计算场景,给出了一种基于分步小波变换的对流层电波传播特性分析方法;其次,基于提出的分析方法和Matlab,开发了对流层电波传播特性分析软件。数值计算表明,提出的分步小波变换方法收敛性比分步傅里叶变换方法好;对流层传播损耗与天线高度和仰角密切相关,天线仰角越小传播损耗也越小,天线高度越大传播损耗越小;蒸发波导环境下的传播损耗比标准大气环境下的传播损耗要小。此外,开发的分析软件图形用户界面友好,操作简单、灵活。

In order to meet the needs of tropospheric wireless communication system design and optimization, based on parabolic wave equation and Split Step Wavelet Method(SSWM), the tropospheric radio wave propagation characteristics were studied, and the wave propagation characteristic analysis software was developed. Fristly,a method for analyzing the tropospheric propagation characteristics based on split step wavelet method was presented by establishing a computation scene of numerical solution. Then, the tropospheric radio wave propagation characteristics analysis software was developed based on the proposed analysis method and Matlab.The numerical results show that the convergence of the proposed SSWM is better than that of Split Step Fourier Method(SSFM);tropospheric propagation loss is closely related to antenna height and elevation: the smaller the antenna elevation angle, the smaller the propagation loss;the larger the antenna height, the smaller the propagation loss;the propagation loss in an evaporation duct environment is smaller than that in the standard atmospheric environment. In addition, the developed analysis software has a user-friendly graphical user interface and is simple and flexible to operate.