高分辨距离像稀疏表示的原子构造与算法研究

在稀疏成份分析的框架下,根据雷达目标在高频区的电磁散射特性,给出了高分辨一维距离像稀疏表示的原子信号构造方法。利用原子信号的结构特点,提出了计算稀疏解的快速算法,计算过程中不需存储系数矩阵,降低了对存储单元的要求。数值结果表明,该算法能从较低分辨率的测量数据中获得高分辨的一维距离像,从而较准确地估计出散射中心的相关参数。

Atom construction and algorithm research on the sparse representation of high range resolution profile

According to the scattering characteristics of radar target in high frequency, this paper studies the atom construction methods for the sparse representation of high range resolution profile within the framework of sparse component analysis. In terms of the structure of atom signals, corresponding fast algorithms are presented to compute the sparse solutions, which need not store the coefficient matrix so as to reduce the demand of memorizer. The numerical results show that the algorithms can provide high range resolution profiles from the measured data with lower resolution and precisely estimate the parameters of scatterers.