摘要
针对伪码引信中抗欺骗干扰的问题,提出了互相关与正交投影联合法。首先干扰作用下的伪码引信视频信号与伪码产生器产生信号进行互相关,通过门限检测法获得相关峰数目,若存在一个相关峰,不进行抗干扰处理,若存在两个相关峰,通过相关峰值检测估计干扰延时,利用该延时信息和伪码产生器产生信号获得正交投影矩阵,干扰通过正交投影被滤除。仿真分析发现该方法能有效滤除干扰,抗干扰后信号与理想回波信号基本吻合。
A cross-correlation and orthogonal projection method is presented to suppress the fraudulent jamming for pseudo noise （PN） fuze. The received videosignal is correlated with the PN signal from the signal generator. The number of correlation peaks is obtained by threshold detection. If there is only one peak, it is unnecessary to suppress jamming. If there are two peaks, the fraudulent jamming time delay is estimated by correlation peak detection. The projection matrix is obtained by the time delay information and PN signal . The jamming is suppressed by orthogonal projection. It is found by simulation that the above method can effectively suppress the jamming. The signal after suppressing is similar to the ideal videosignal.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2007年第4期509-513,共5页
Journal of Nanjing University of Science and Technology
基金
国防"十五"重点预研项目
关键词
伪码引信
欺骗干扰
互相关
正交投影
抗干扰
pseudo noise fuze
fraudulent jamming
cross-correlation
orthogonal projection
jam-ming suppressing
