现代雷达2017，Vol.39Issue(5)：46-49,58,5.DOI:10.16592/j.cnki.1004-7859.2017.05.010
DRM外辐射源雷达多普勒扩展杂波抑制算法研究
Non-zero Doppler Shift Multipath Clutter Suppression in DRM-based Passive Bistatic Radar
摘要
Abstract
DRM digital AM broadcasting-based passive radar faces serious multipath clutter problem,which not only contains zeroDoppler-frequency-shift multipath clutter caused by static ground scattering objects,but also exists multipath clutter with doppler frequency shift caused by the moving sea surface or other scatters.The extensive cancellation algorithm (ECA) is often used to suppress multipath clutter in passive radar,but only for the zero-doppler-frequency-shift multipath clutter.In this paper,the passive radar signal model considering multipath clutter with doppler shift is presented.Combining with the characteristics of the signal waveform,an extension algorithm of ECA in carrier domain is proposed.The multipath clutter suppression mechanism of the extended ECA-C is analyzed in-depth.The method firstly analyzes the component of each carrier signal,constructs the corresponding clutter subspace,and uses the subspace orthogonal projection for suppression of both the multipath clutter with zero and non-zero doppler frequency shift.It can improve the clutter suppression ability of the system,and thus improve the capability of weak target detection.Theoretical analysis and the measured data processing results show the superiority of the proposed algorithm.关键词
DRM无源雷达/杂波抑制/海杂波/扩展相消杂波抑制算法/分载波Key words
DRM-based passive radar/clutter rejection/sea clutter/extensive cancellation algorithm/on each carrier分类
信息技术与安全科学引用本文复制引用
赵志欣,朱斯航,徐超,陈良兵..DRM外辐射源雷达多普勒扩展杂波抑制算法研究[J].现代雷达,2017,39(5):46-49,58,5.基金项目
国家自然科学基金资助项目(61461030) （61461030）
江西省自然科学基金资助项目(20161BAB203079,20151BAB213034) （20161BAB203079,20151BAB213034）
江西省教育厅自然科学基金资助项目(GJJ150097) （GJJ150097）
