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中文摘要：
为了减小运动目标在飞行过程中由于自身雷达截面积（RCS）起伏带来的影响，在分析目标RCS起伏特征的基础上，给出了几种常用的目标RCS起伏模型，考虑实际中具体目标的运动情况，建立了一种更符合实际目标运动的起伏模型，具体分析了长驻留信号对抗起伏目标的效果。通过分析不同起伏频率时长驻留采样的结果可以知道，与常规雷达信号相比，长驻留信号能够很好地平滑一定起伏频率范围内的快起伏目标RCS，减小因目标起伏带来的一系列影响。最后从稳跟距离的角度分析得出长驻留信号能够有效实现对快起伏目标的稳定跟踪。仿真证明：长驻留信号具有良好的抗目标起伏特性。
英文摘要：
In order to decrease the influence resulted from the fluctuation of moving targets RCS in the flight process, this paper gives several common target RCS fluctuation models based on the analysis of RCS characteris- tics, then builds a proper model considering the concrete circumstances of virtual targets, and makes a detailed a- nalysis of the effect that the long dwell signal combats fluctuating targets. Compared with the conventional radar sig- nal, the long dwell signal could smooth the RCS of fast fluctuating targets under certain fluctuant frequency range and decrease a series of influence resulted from fluctuating targets through analyzing the results of long dwell signal sampling. Finally, the long dwell signal could implement stable tracking effectively in the perspective of analyzing stable tracking range. The simulation results also show that the long dwell signal has a good property in anti - target fluctuation
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