基于子空间的幅相误差自校正算法

摘要

针对实际应用中普遍存在的阵列幅相误差扰动问题，结合子空间类波达方向估计算法，提出了一种幅相误差的自校正算法。先利用均匀线阵协方差矩阵的结构特点对幅相误差进行初步校正，再通过迭代方法得到更精确的估计值，自校正方法无需任何参数初始值，实现比较简单。仿真实验验证了算法具有良好的误差校正效果，能够比较准确的估计出方位角和幅相误差值。%Aiming at the array amplitude phase errors perturbation problem widespread in practical application ,a self-calibration algorithm which combines with subspace DOA estimation algorithm for amplitude phase error is presented in this paper. Firstly, the amplitude phase error is preliminary calibrated using the structural characteristics of equality linear array covariance matrix. Then the more accurate estimation is gained through the iterative method. Self-calibration method doesn't need any initial parameter and easy to realize. The simulation shows that the algorithm has good effect on error calibration and can accurately estimate the azimuth and the value of the amplitude phase error.