摘要
在外辐射源雷达中,尤其是全球移动通信信号辐射源雷达中,不仅存在很强的直达波和多路径干扰,同时还存在着来自同频基站的同频干扰.在没有干扰样本的情况下,很难单独利用时域相消的方法抑制同频干扰.针对回波通道中含有同频干扰的问题,提出了一种外辐射源雷达同频干扰的抑制方法.首先利用低副瓣空域滤波消除远区的弱干扰,同时对近区的强干扰进行一定程度的抑制;然后利用时域干扰对消算法抑制来自主基站的直达波及多径干扰;最后利用稳健的自适应波束形成方法对剩余的干扰进行抑制.理论分析与计算机仿真实验表明,该方法具有良好的干扰抑制性能和较低的运算量.
In passive bistatic radar,especially in the global system for mobile communication based passive bistatic radar,there are not only strong direct signal and multipath,but also co-channel interference.It is difficult to suppress co-channel interference using temporal adaptive cancellation without the samples of interference.Aiming at the problem of co-channel interference signals existing in the echo channel,a method of co-channel interference cancellation for passive bistatic radar is proposed.First,low sidelobe spatial filtering is used to remove the remote weak interference,at the same time the strong interference is suppressed to a certain extent.Then,the direct signal and multipath signal coming from the main station are suppressed by using temporal adaptive cancellation.Finally,the remaining interference is further cancelled by a robust adaptive beamformer.The performance and calculation of the proposed method are verified by theoretical analysis and simulation.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2017年第6期37-42,共6页
Journal of Xidian University
基金
国家部委基金资助项目(9140A07020614DZ01)
国家自然科学基金资助项目(61401526)
关键词
外辐射源雷达
同频干扰
空域滤波
时域对消
passive bistatic radar
co-channel interference
spatial filtering
temporal cancellation
作者简介
陈刚（1992-）,男,西安电子科技大学博士研究生,E-mail：chengang.xidian@163.com.
