Signal parameter estimation of PSA means estimating the angles of arrival and the polarization angles simultaneously according to the samples of PSA.

• 用克拉美一劳限(CRB)来衡量信号到达角和极化角的估计精度，利用Fisher信息矩阵求逆导出信号到达角和极化角CRB的解析表达式，两信号特征参量接近时，它们的估计精度均下降。