多视角距离像序列弹道目标的进动参数估计  

Precession Parameter Estimation for Ballistic Targets Based on Multi-aspect Range-Profile Sequence

作　　者：贺思三[1] 赵会宁[1] 冯存前[1] 

机构地区：[1]空军工程大学防空反导学院,陕西西安710051

出　　处：《信号处理》2013年第8期1027-1035,共9页Journal of Signal Processing

摘　　要：进动参数是中段目标识别的重要特征来源。以锥形弹头为研究对象,首先分析了进动参数、目标结构参数对一维距离像目标长度的影响,建立了高分辨雷达多视角观测模型。在此基础上,提出了一种基于多视角时间-距离像对进动特征及结构特征进行联合估计的算法,并对其CRB进行了推导。该算法利用多部高分辨雷达所观测的目标投影长度变化的中心及幅度信息实现了无先验信息下进动参数与目标结构参数的高精度估计。仿真结果验证了所提算法的有效性。Precession features are important feature source for target recognition in mid-course. Aimed to the problem of precession feature extraction for conical warhead, the relationship among high range resolution profile （HRRP） length, pre-cession parameters and target＇ s structure parameters is analyzed. Also, the observation model for muhi-aspect high resolu- tion radar is introduced, and the formula which combined the target＇ s projected length with target＇ s structure parameters and procession parameters is deduced. Based on this, an algorithm which utilizes the high range resolution profile （HRRP） sequences to estimate the precession feature and the structure feature jointly is proposed. The proposed algorithm utilize the variation irfformation of target＇ s projected length obtained from HRRP sequences to estimate precession parameter, which can obtain the estimation of precession parameter and target structure parameters without any prior information. During parameters estimation, the information obtained by different radars is all used. Also, the Cramer-Rao bound （CRB） of the proposed al-gorithm is deduced. Simulation results show that the presented method is effective and the deduced CRB is correct.

关 键 词：特征提取 弹道目标 进动 高分辨距离像 

分 类 号：TN957.51[电子电信—信号与信息处理]