Refocusing Moving Ship Targets in SAR Images Based on Fast Minimum Entropy Phase Compensation

被引：19

作者：

Huang, Xiangli ^{[1
,2
]}

Ji, Kefeng ^{[1
,2
]}

Leng, Xiangguang ^{[2
]}

Dong, Ganggang ^{[3
]}

Xing, Xiangwei ^{[4
]}

机构：

[1] Natl Univ Def Technol, State Key Lab Complex Electromagnet Environm Effe, Changsha 410073, Hunan, Peoples R China

[2] Natl Univ Def Technol, Sch Elect Sci, Changsha 410073, Hunan, Peoples R China

[3] Xidian Univ, Natl Lab Radar Signal Proc, Xian 710071, Shaanxi, Peoples R China

[4] Beijing Inst Remote Sensing Informat, Beijing 100192, Peoples R China

来源：

SENSORS | 2019年 / 19卷 / 05期

基金：

中国国家自然科学基金;

关键词：

synthetic aperture radar (SAR); inverse synthetic aperture radar (ISAR); moving ship; refocusing; fast minimum entropy; GLOBAL RANGE ALIGNMENT; AUTOFOCUSING TECHNIQUE; ISAR; ALGORITHM;

D O I：

10.3390/s19051154

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Moving ship targets appear blurred and defocused in synthetic aperture radar (SAR) images due to the translation motion during the coherent processing. Motion compensation is required for refocusing moving ship targets in SAR scenes. A novel refocusing method for moving ship is developed in this paper. The method is exploiting inverse synthetic aperture radar (ISAR) technique to refocus the ship target in SAR image. Generally, most cases of refocusing are for raw echo data, not for SAR image. Taking into account the advantages of processing in SAR image, the processing data are SAR image rather than raw echo data in this paper. The ISAR processing is based on fast minimum entropy phase compensation method, an iterative approach to obtain the phase error. The proposed method has been tested using Spaceborne TerraSAR-X, Gaofeng-3 images and airborne SAR images of maritime targets.

引用

页数：18

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