中文说明：
对实际降雨信道环境的模拟，根据不同的降雨概率，得到降雨的类型，以及降雨引起的路径损耗值。对于想要仿真实际环境和信道，可以加入降雨这一干扰，作为对性能评估的一个影响因素，其中涉及到的降雨类型及对应的雨衰减率依据国标。
English Description：
Through the simulation of the actual rainfall channel environment, according to different rainfall probability, the type of rainfall and the value of path loss caused by rainfall are obtained. If you want to simulate the actual environment and channel, you can add the interference of rainfall as an influencing factor of performance evaluation, in which the type of rainfall involved and the corresponding rain attenuation rate are based on the national standard.