基于一维距离像序列的进动目标参数估计

高分辨一维距离像为识别弹道目标的重要方式，但单幅距离像并不能得到目标真实尺寸，也不能得到目标的进动参数。利用弹道目标的一维距离像尺寸序列的信号模型，提出一种估计弹道目标真实尺寸、进动周期和进动角的新方法。该方法先对尺寸序列采用四参数模型进行曲线拟合，估计出包括进动周期在内的信号参数，得到包括目标真实尺寸、进动角和目标姿态角三个未知数在内的二个方程；再利用弹道目标零攻角的再入特性，得到目标姿态角，从而解出目标真实尺寸和进动角。仿真结果表明该方法的有效性。

Parameter Estimation on Procession Target Based on HRRP Sequences

High resolution range profile（HRRP） is an important means to recognize ballistic targets. However, the real size of target can not be obtained only by use of single HRRP, nor the procession parame- ter. A method is proposed to estimate the parameters of ballistic targets using HRRP size sequences model. Firstly, a curve fit algorithm is adopted to estimate the four parameters of HRRP size model, then the pro- cession period and two equations of three parameters including the real size, the procession angle, and the perspective angle are got. Secondly, the aspect angle is known under the condition of zero attack angle of re- entry property, then the real size and procession angle of target are solved. Simulation results prove the ef- fectiveness of the method.