基于延时转发的干扰体制,设计了一种新的运用于弹道导弹自由段的有源假目标干扰方法,能够生成运动轨迹近似真实导弹的假目标。首先,建立了弹道导弹自由段运动模型,构建虚拟弹道平面,采用透视投影的方法,通过求解二次锥面与平面交线的几何问题生成逼真的假目标轨道;其次,推导了假目标弹道的时延函数,讨论了实际情况下数字射频存储器(DRFM)在转发信号时其步进间隔与步进长度的约束条件,在理想时延函数非线性的情况下,对DRFM 阶梯状时延函数进行了设计;最后,通过情景模拟与仿真试验论证了该设计的有效性。

An active decoy interference method is presented in this paper. It is applied to the coast flight of ballistic missile based on time-delay retransmission interference system and can form false target with the same trajectory as real target. Firstly, the motion model of the coast flight trajectory of ballistic missile and virtual ballistic plane are built, and the false target trajectory generation is formed by solving a geometry problem of quadric cone and plane intersection with perspective projection method; Then, the time-delay function of ballistic false target is deduced, the constraint condition of digital radio frequency memory( DRFM) step interval and step length in actual circumstances of retransmission is discussed, and the stepped delay function of DRFM is designed when the ideal delay function is nonlinearity; Finally, this design method is proved effective though simulation and analysis.

TJ972.31