有均匀线阵的CRB曲线，采用累计贡献率的方法，是国外的成品模型，一种噪声辅助数据分析方法,考虑雨衰 阴影 和多径影响，复化三点Gauss-lengend公式求pi，最小均方误差（MMSE）的算法。- There ULA CRB curve, The method of cumulative contribution rate Foreign model is finished, A noise auxiliary data analysis method, Consider shadow rain attenuation and multipath effects Complex of three-point Gauss-lengend the Formula pi, Minimum mean square error (MMSE) algorithm.