双／多基地综合脉冲孔径地波雷达的互耦校正  

Calibration of mutual coupling for bi/multi-static synthetic impulse and aperture ground wave radar

作　　者：郭利强[1] 朱守平[1] 陈伯孝[1] 张守宏[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

出　　处：《电波科学学报》2008年第1期134-140,共7页Chinese Journal of Radio Science

基　　金：国防预研资助项目(No.40106020203);教育部优秀人才支持计划资助(NCET-06-0856)

摘　　要：讨论双/多基地综合脉冲孔径地波雷达的互耦校正问题。结合该雷达给出互耦数学模型,提出一种基于子空间理论、利用直达波信号进行互耦系数估计的算法,并讨论在互耦条件下的DOA(directions-of-arrival)估计;同时推导了互耦系数估计的Cramer-Rao界(CRB),由此可以得出接收站方位角对估计性能的影响。Monte-Carlo仿真结果验证了算法的有效性。该算法可获得较高的互耦系数估计精度,其估计方差接近Cramer-Rao界;经过互耦校正的MUSIC算法的DOA估计效果良好。The problem of mutual coupling calibration in the bi/multi-static synthetic impulse and aperture ground wave radar is discussed. The paper begins with the mathematical model of the mutual coupling, and then based on the subspace principle, an algorithm which uses direct wave signal to estimate mutual coupling matrix is proposed. The directions-of-arrival （DOA） estimation with mutual coupling is also presented. Moreover, the Cramer-Rao Bound （CRB） of the estimation is derived. From the CRB formula, it can be concluded that the azimuth of receiving station has great effect on mutual coupling estimation. The Monte-Carlo simulation results show the validity of the new algorithm. The algorithm could obtain a mutual coupling estimation with high accuracy, and the estimation variances are close to the Cramer-Rao Bound. The MUSIC algorithm with mutual coupling calibration achieves a favorable estimation of directions-of-arrival.

关 键 词：双/多基地雷达 综合脉冲孔径 互耦校正 DOA估计 CRAMER-RAO界 

分 类 号：TN958.93[电子电信—信号与信息处理]