基于频域脉压运动补偿研究

Research on Motion Compensation Based on FD PC

目标高速运动将导致脉冲包络在不同重复周期发生走动,当走动距离大于信号带宽分辨率时,脉冲间相参积累效率将大大降低。尤其是导引头本身处于高速运动中,其弹目径向速度一般会超过好几马赫,因此极有可能遇到距离走动问题。本文通过分析距离走动对MTD的影响,提出了一种在频域脉压实现运动补偿的技术。仿真验证表明,本文的方法能够在弹目径向速度未知的情况下,补偿由于导引头高速运到造成的跨距离单元问题,实现长时间脉冲间相参积累。

The high-speed movement of target will cause the pulse envelop to move at different PRI,and the efficiency of inter pulse coherent accumulation will be greatly reduced when the distance migration exceeded the bandwidth resolution.Especially when the seeker itself was in high-speed motion,its radial velocity of the seeker-target usually exceeded several Mach,so it is highly probably to encounter distance motion problem.By analyzing the influence on MTD of distance migration,a technique for motion compensation was proposed using frequency domain pulse compression.Simulation results showed that the method proposed in this article can compensate for the cross distance by the high-speed motion of the seeker when the accurate velocity between the target and the seeker was unknown.