基于降维的双基地MIMO雷达收发阵列互耦和幅相误差校正算法  

Reduced dimensional calibration method for bistatic MIMO radar with mutual coupling and gain-phase errors of transmitting and receiving arrays

作　　者：杨守国[1,2] 李勇[2] 张昆辉[2] 郭艺夺[1] YANG Shouguo ;LI Yong ;ZHANG Kunhui ;GUO Yiduo 1

机构地区：[1]空军工程大学防空反导学院,陕西西安710051 [2]西北工业大学电子信息学院,陕西西安710072

出　　处：《系统工程与电子技术》2018年第12期2668-2674,共7页Systems Engineering and Electronics

基　　金：国家自然科学基金(61501501)资助课题

摘　　要：双基地多输入多输出(multiple input multiple output,MIMO)雷达收发阵列互耦和幅相误差会严重影响高分辨波达方向(direction of arrival,DOA)和波离方向(direction of departure,DOD)估计算法的性能。针对这一问题,通过在收发阵列中分别引入若干个经过精确校正的辅助阵元,并利用子空间原理和降维思想,提出了一种双基地MIMO雷达目标二维角度及收发阵列互耦和幅相误差矩阵的联合估计算法。首先,该算法不需要收发阵列互耦和幅相误差矩阵信息,就能较为精确地估计出目标的DOA和DOD;然后,基于对目标二维角度的精确估计,还能进一步对互耦和幅相误差矩阵进行精确估计,进而对收发阵列误差实现自校正。所提算法只需进行一维谱峰搜索,不需要高维非线性优化搜索,所以运算量较小。计算机仿真结果证明了所提算法的有效性和正确性。The mutual coupling and gain-phase errors of the transmitting and receiving arrays would significantly degrade the performance of the estimation algorithms for high-resolution direction of arrival（DOA）and direction of departure（DOD）in bistatic multiple input multiple output radar.To solve this problem,ajoint estimation algorithm for two-dimensional（2D）angle of the targets and the mutual coupling and gain-phase error matrices of the transmitting and receiving arrays is proposed,which exploits the subspace theory and reduced dimension idea by applying several well-calibrated instrumental sensors in both transmitting and receiving arrays.Firstly,DOA and DOD of the targets can be estimated accurately by the algorithm without the knowledge of the mutual coupling and gain-phase error matrices.Secondly,an accurate estimation can also be achieved for the mutual coupling and gain-phase error matrices based on the accurate estimation of the 2D angle for the targets.Furthermore,the self-calibration is realized for the array errors.The proposed algorithm only needs one-dimensional spectral peak search,and does not need high-dimensional nonlinear optimized search,so it has a little calculation.The efficiency and accuracy of the proposed algorithm are verified by the computer simulation results.

关 键 词：双基地多输入多输出雷达 波达方向 波离方向 互耦 幅相误差 

分 类 号：TN957[电子电信—信号与信息处理]