基于线性变换的阵列幅相误差自校正算法

摘要

Processing the signals received on an array of sensors for localization of multiple emitters is of great interest.However,the common array gain/phase errors will severely affect the estimation performance of direction finding algorithms.In this paper,a self-calibration method of gain/phase errors based on linear trans-formation is proposed.Both the gain/phase coefficients and direction of arrival (DOA)can be estimated effec-tively by a sequence of processes including applying a group of instrumental sensors with consistent gain/phase performance,converting and deriving the matrix by using the orthogonal linear transformation as well as combi-ning the least squares method.The proposed algorithm is able to self-calibrate the array gain/phase errors with-out spectral searching and matrix decomposition,there it is low in computational load and complexity.Further-more,the computer simulation results verify the effectiveness and superiority of the algorithm.%针对天线阵列的幅相误差严重影响阵列测向算法估计性能的问题，提出了一种基于线性变换的阵列幅相误差自校正算法。该方法通过利用幅度相位特性一致的辅助阵元，进行矩阵的正交线性变换，并结合最小二乘法算法，有效地估计阵列的幅相误差系数和入射信号的波达方向。其不需要谱峰搜索，无特征分解运算，计算量小，复杂度低，可实现对阵列幅相误差的快速校正。计算机仿真实验结果验证了该算法估计性能的有效性。