基于HH变换的非平稳运动目标的ISAR成像  

ISAR imaging of non-stationary moving target based on HH transform

作　　者：范录宏[1] 黄顺吉[1] 侯印鸣[1] 

机构地区：[1]电子科技大学电子工程学院,四川成都610054

出　　处：《电波科学学报》2006年第4期624-627,共4页Chinese Journal of Radio Science

摘　　要：ISAR时频分析法成像与传统的成像处理算法相比,将二维的距离-多普勒矩阵变成了三维的时间-距离-多普勒矩阵,在一定程度上改善了成像质量,但对于非平稳运动目标的成像效果并不非常显著。应用Hilbert-Huang变换,对非平稳运动ISAR目标进行成像处理,并与经典的Wigner-Ville分布算法所得图像进行比较。成像试验结果表明:该算法明显改进了图像质量。Compared with the traditional imaging algorithm, the ISAR time-frequency analysis, which transforms 2-dimansion range-Doppler matrix to 3-dimension time-range-Doppler matrix, may improve the imaging quality at a certain extent, but is not suitable for the case of non-stationary moving targets. A new ima- ging scheme base on Hilbert-Huang transform is presented and the ISAR image of a non-stationary moving target is processed in this paper. The simulation results show that the scheme can obviously improve the image quality against the traditional Wigner-Ville distribution algorithm.

关 键 词：逆合成孔径雷达(ISAR) 时频分析 Hilbert—Huang变换 

分 类 号：TN974[电子电信—信号与信息处理]