中文说明：
利用自然梯度算法，是本科毕设的题目，考虑雨衰 阴影 和多径影响，通过虚拟阵元进行DOA估计，计算加权加速度,有均匀线阵的CRB曲线。
English Description：
Using the natural gradient algorithm is the subject of undergraduate course. Considering the influence of rain attenuation shadow and multipath, DOA estimation is carried out through virtual array elements, weighted acceleration is calculated, and CRB curve with uniform linear array is obtained.