基于延时变化量估计的伪码引信抗欺骗式干扰方法

The Method of Fraudulent Interference Excision Based on Time Delay Difference Estimation for PN Fuze

为抑制作用于伪码引信的欺骗式干扰,提出了基于延时变化量估计的正交投影抗干扰方法。该方法利用干扰与目标回波的延时变化量差异将其区分,通过互相关获得干扰延时估计。利用获得的干扰延时信息构造干扰正交投影矩阵,干扰通过正交投影被滤除。最后采用该方法对欺骗式干扰作用下的伪码引信进行了仿真实验,结果表明该方法能有效抑制干扰,有用信号失真很小,抗干扰后信号与理想回波信号基本吻合。

To excise the fraudulent interference imposed on PN fuze,the method of orthogonal projection based on time delay difference estimation is presented.The interference and useful echo signal are distinguished by time delay difference.The time delay of interference is got by cross-correlation.The interference orthogonal projection matrix is constructed with the estimated time delay of interference.The interference is excised by projection.At last it is validated by simulation that the fraudulent interference ca...