利用直达波导频信号的高频外辐射源雷达接收阵列校正方法  

Receiving Array Calibration Using DRM Frequency Reference Signal of Direct Wave for HF Passive Bistatic Radar

作　　者：邵启红[1,2] 万显荣 尤君[1] 程丰[1] 柯亨玉[1] 

机构地区：[1]武汉大学电子信息学院,湖北武汉430079 [2]湖北工业大学电气与电子工程学院,湖北武汉430068

出　　处：《武汉大学学报（信息科学版）》2015年第8期1069-1074,1087,共7页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目(61331012;U1333106;41106156;41074116);中央高校基本科研业务费专项资金资助项目(2012212020214)~~

摘　　要：基于数字调幅广播(DRM)的特点,提出了一种利用直达波频率导频信号的高频外辐射源接收阵列幅相一致性校正新方法。首先介绍了DRM广播的信号结构,分析了其导频信号作为校正源的可行性;考虑到高频段电磁环境和传播环境的时变非平稳特性,提出了一种基于平移不变阵元偶在时间上优选直达波校正数据的方法;最后结合地波模式和天波传播模式高频外辐射源雷达实测多通道数据,比较了该方法与其他辅助定标源方法用于接收阵列校正的效果,分析结果证实了该方法的有效性。Based on the characteristics of the digital radio mondiale （DRM）, a new method of array calibration for high-frequency passive radar （HFPBR） by using frequency reference signal of direct wave is proposed. Firstly the signal structure of DRM is introduced, while the feasibility of take fre- quency reference signal as the calibration source is demonstrated. Secondly, taking into account the e- lectromagnetic environment and time-varying non-stationary propagation characteristics, a method of choosing high quality direct wave period by the shift-invariant antenna pairs is proposed. Finally, as- sist by the known DRM transmitter position, we utilized this method deal with measured direct wave data which propagate in surface wave mode and sky wave mode, compared the result of array calibra- tion value with known single frequency signal source. The results showed that the amplitude and phase compensation method in DRM-hased HFPBR is effective.

关 键 词：外辐射源雷达 高频雷达 频率导频信号 阵列校正 

分 类 号：TN95[电子电信—信号与信息处理] P23[电子电信—信息与通信工程]