基于旋转发射阵列的MIMO雷达阵列校正方法  

MIMO Radar Calibration Method Based on Transmitting Array Rotation

作　　者：顾帅楠 郑娜娥 秦文利[1] 李玉翔[1] GU Shuainan;ZHENG Nae;QIN Wenli;LI Yuxiang(Information Engineering University, Zhengzhou 450001, China)

机构地区：[1]信息工程大学,河南郑州450001

出　　处：《信息工程大学学报》2019年第5期547-552,共6页Journal of Information Engineering University

摘　　要：针对集中式多输入多输出(MIMO)雷达发射端和接收端同时存在位置误差和幅相误差的问题,提出一种基于旋转发射阵列的误差校正方法。首先,利用旋转发射阵列获得不同方位的回波数据,将耦合在一起的位置误差和幅相误差相分离;然后,通过解相位模糊得到虚拟阵列的位置信息,根据虚拟阵列的形成原理,分别获得收发阵列的位置误差;最后,由接收回波数据协方差矩阵最大特征值所对应的归一化的特征向量求得发射端和接收端的幅相误差估计。仿真实验验证了方法的有效性和可行性。在多种阵列误差并存的情况下,该方法复杂度低,能获得较精确结果,且适用于非均匀MIMO雷达阵列。For the sensor position errors,gain-phase errors in the transmitting and receiving arrays of collocated MIMO radar,a calibrating method based on transmitting array rotation is proposed.Firstly,the position errors and gain-phase errors are separated from each other by the data from different directions obtained by rotating transmitting arrays.Then,the position of the virtual array is calculated after phase unwrapping.According to the forming principle of the virtual array,the actual positions of the transmitting and receiving arrays are obtained.Furthermore,the gain-phase errors are estimated via the normalized eigenvector of the maximum eigenvalue.Finally,the simulation results verify the effectiveness and feasibility of the method.In the presence of multiple errors,the method can get relatively accurate results with low complexity and it is also applicable to the non-uniform MIMO radar arrays.

关 键 词：MIMO雷达 位置误差 幅相误差 解相位模糊 虚拟阵列 

分 类 号：TN958[电子电信—信号与信息处理]