非合作连续波雷达中存在强直达波和多径杂波的运动目标检测方法  

Detection of Moving Targets in Commercial Illuminator Based Radar System with Strong Direct Signal and Multipath Clutters Presented

作　　者：王俊[1] 赵洪立[1] 张守宏[1] 保铮[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：《电子学报》2005年第3期419-422,共4页Acta Electronica Sinica

基　　金：国家自然科学基金 (No .60 4 72 0 87) ;国家部委跨行业预研基金资助项目 (No .51 4 0 70 30 1 0 1DZ0 1 2 0 )

摘　　要：研究了利用非合作商用调频照射信号的收发分置连续波无源雷达系统运动目标的检测技术 .针对该系统中强直达波及多径杂波对动目标检测的干扰 ,提出了一种直达波和多径到达时间为整数采样迟延的杂波抑制方法和利用分数内插提高杂波对消性能的算法 .在杂波对消的基础上 ,通过对回波信号作长时间相干匹配滤波实现对微弱运动目标的检测 .基于实测数据及实时系统的处理结果验证了方法的有效性 .Clutter cancellation algorithm for passive coherent detection of weak moving targets in a non-cooperative bistatic radar system using commercial FM illuminating is provided. The algorithm presented a method for canceling clutter with arrival time located exactly at integral sampled intervals, and a method exploiting fractional delay interpolation for better rejection of the interference from strong direct signal and multipath reflected clutter. After direct signal and multipath clutter cancellation, the moving targets can be easily detected and tracked using cascade long-term coherent match filtering of received signal. The efficacy of the method is demonstrated by offline processing real collected data sets as well as real-time processing via a mobile experimental system.

关 键 词：非合作商用照射 无源相干检测 分数内插 杂波对消 

分 类 号：TN953[电子电信—信号与信息处理]