基于L型阵列的幅相误差自校正算法研究

Self-Correction Algorithm of Amplitude and Phase Errors Based on the L-Shaped Array

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,基于L型阵列,提出了一种幅相误差的自校正算法。先利用均匀阵列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,能够比较准确地估计出波达方向角和幅相误差值。

Aimed at the ubiquitous problem of amplitude and phase errors in practical application, combined with DOA estimation algorithm of the subspace class and based on the L-shaped array, a kind of algorithm to correct amplitude and phase errors is proposed. Firstly amplitude and phase errors are preliminarily estimated according to the structural features of the uniform array covariance matrix; then the more accurate estimation is obtained through the iterative method. Relatively, the self-cor- rection method is easy to achieve without any initial parameters. The simulation results manifest that the algorithm has a good error correction effects and is able to accurately estimate the wave of direction angle and the value of amplitude and phase errors.