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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。
Based on the jamming system with time-delay retransmission, a new active jamming method based on the free segment of ballistic missile is designed, which can generate a false target with a trajectory similar to a real missile. Firstly, the motion model of the free-space ballistic missile was established, the virtual trajectory plane was constructed, and the virtual projective trajectory was generated by solving the geometrical problem of the intersection of the quadratic cone and the plane by using perspective projection method. Secondly, Delay function, the constraints of the step interval and the step length of digital radio frequency memory (DRFM) in the real situation are discussed. Under the condition of the ideal delay function being nonlinear, the step delay function of DRFM Finally, the effectiveness of the design is demonstrated through the scenario simulation and simulation experiments.