中文摘要：

弹头目标运动特征的提取是真假目标识别的前提,其中章动参数是描述弹头运动特征的关键参数。基于全极化散射矩阵测量,提出了章动参数估计方法。给出了自由段弹头的章动特征和旋转对称弹头的极化散射特性,提出了全局搜索—反馈线性最小二乘章动参数估计方法,利用该方法可以得到章动周期、章动角和章动轴与视线夹角等参数。给出了仿真结果,验证了章动参数全极化测量方法,并分析了噪声条件下测量性能。该方法在弹道防御真假目标识别领域中有很好的应用价值。

英文摘要：

The correct extraction of warheads＇ motion characteristics is the precondition of target recognition,and the nutation parameter is one of the important motion parameters.Based on the full polarization scatter matrix measurement,a nutation parameter estimation method was proposed in this paper.The motion characteristic and polarization scatter characteristics of the rotary symmetric warhead in ballistic midcourse were given.The nutation parameter estimation method based on global searching and feedback linear least squares estimation was proposed,which could be used to obtain the nutation period,nutation angle and the angle between nutation axis and LOS.The simulation results show the feasibility of this method,and its performance under noise condition is analyzed.