基于子空间类法的阵列误差有源校正方法

An Array Error Calibration Technique with Signal Source Based on Subspace Approach

针对均匀线阵提出了一种对同时存在阵元位置误差、幅相误差及阵元互耦的阵列进行校正的方法。该方法通过旋转阵列天线得到多个校正方位的样本数据,达到多个信源独立分时校正的效果,然后通过对空时矩阵进行特征分解,得到实际阵列流型的估计值,并构造代价函数,最后采用迭代算法同时估计出所有阵列误差参数,从而实现误差的校正。计算机模拟仿真及实际阵列天线的校正实验均验证了该算法对误差参数估计的有效性和校正方法的实用性。

A method for calibrating the array element position error,the amplitude and phase error,and the mutual coupling uncertainties of uniform linear array（ULA）is presented.The sample data of multiple az-imuth is obtained by rotating the array antenna to achieve the effect of the independent time-division correc-tion of multiple sources.Then,according to the eigen decomposition to the space and time matrix,the flow pattern of the actual array is estimated and the cost function is constructed.Finally,the array error parame-ters are estimated using iteration algorithm.The computer simulation and experiments for the actual antenna array demonstrate the effectiveness and practicability of the algorithm.