双基地MIMO雷达发射阵列幅相误差的旋转阵列校正法  

Calibration technique for bistatic MIMO radar array amplitude-phase via array rotation

作　　者：党晓方[1] 杨明磊[1] 陈伯孝[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《系统工程与电子技术》2013年第12期2483-2488,共6页Systems Engineering and Electronics

基　　金：国家自然科学基金(61001209);中央高校基本科研业务费专项资金(K5051202038);长江学者和创新团队发展计划(IRT0954)资助课题

摘　　要：双基地多输入多输出(multiple-input multiple-output,MIMO)雷达可利用直达波进行幅相误差校正,但当直达波方向测量不准时,现有的校正算法性能会严重恶化。针对此问题,提出了一种新的基于子空间的旋转阵列幅相误差校正算法。该算法通过旋转发射阵列天线得到不同方位角的协方差矩阵,利用子空间算法估计通道的增益和相位误差。该算法无需已知直达波的入射角,只需已知发射阵列天线的旋转角度,即可同时完成发射通道幅相误差和直达波到达角的估计,且性能较好,计算机仿真和实测数据结果验证了算法的有效性。The bistatic multiple-input multiple-output （MIMO） radar can estimate amplitude and phase er-rors via direct wave, but the performance of the current algorithm will degrade greatly in the presence of direct wave estimate error. To deal with this problem, a new method for array amplitude-phase calibration based on subspace algorithm is proposed. After rotating array antenna with various azimuth angles, an array covariance matrix can be calcula＇ted and the gain and phase errors are obtained by subspace-based algorithms. Instead of the requirement for the priori information of the direction of arrival （DOA） of the direct wave, this new method needs the accurate angle of rotating array, then it can estimate the DOA of the direct wave and the gain and phase errors of the channel simultaneously. The performance of the proposed method is good, computer simula-tions and real data are conducted to show the validity of the proposed method.

关 键 词：双基地多输入多输出雷达 阵列幅相误差校正 子空间 阵列旋转 

分 类 号：TN911.7[电子电信—通信与信息系统]