一种波达方向和幅相误差联合估计的改进方法

摘要

The problem of estimating both gain-phase errors and DOA simultaneously is studied. The coupling of DOA and the gain-phase errors of the array degrades the precision of the estimation greatly. By analyzing the coupling, a method that estimates the gain-phase errors of the array is presented. Both of the DOA and gain-phase errors can be estimated accurately with only one iteration, so that the presented method is of less computational complexity and easy to implement. The processing results of simulated data show the effectiveness of the new method.%阵列幅相误差的存在将大大影响波达方向的估计精度,反之在波达方向未知的情况下,幅相误差同样无法精确估计,两者相互耦合.在详细分析两者耦合情况的基础上,从工程应用角度出发,给出了一种改进的幅相误差校正方法.该方法能够在波达方向未知的条件下,精确估计阵列幅相误差,同时给出波达方向.由于仅需一次迭代,该方法的计算量较少,更易实现.仿真数据的处理结果证明了该方法的可行性.