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针对十字型阵列的互耦校正问题,提出一种信号源的二维角信息与互耦系数联合估计的互耦自校正算法,该方法对线阵内和线阵间的互耦同时进行校正.利用线阵内互耦矩阵及线阵间互耦矩阵的特性,构造重构矩阵,将耦合的二维角与互耦系数联合估计问题转化为级联估计问题,不需要校正源,避免了高维参数的非线性搜索.理论分析和仿真结果均表明,提出的方法可以很好地解决十字型阵列的互耦校正问题,信号的二维角和互耦系数的估计精度高,且计算量小.
Aiming at the cross-coupling correction problem of cross array, a mutual coupling self-calibration algorithm of joint estimation of two-dimensional angle information and mutual coupling coefficient of signal source is proposed. This method can correct the mutual coupling between line array and line array at the same time. Based on the characteristics of the mutual coupling matrix in a linear array and the mutual coupling matrix between linear arrays, a reconfigurable matrix is constructed, and the joint estimation of coupled two-dimensional angle and mutual coupling coefficient is transformed into a cascade estimation problem, without the need of a correction source and avoiding high Nonlinear analysis of the dimension parameters.The theoretical analysis and simulation results show that the proposed method can well solve the cross-coupling calibration problem of the cross-shaped array, the estimation accuracy of the two-dimensional angle and the mutual coupling coefficient of the signal is high, and the calculation is small .