Optimal Time Selection for ISAR Imaging of Ship Targets Based on Time-Frequency Analysis of Multiple Scatterers

被引：9
|
作者：
Li, Ning [1 ,2 ,3 ]
Shen, Qingyuan [1 ,2 ,3 ]
Wang, Ling [4 ]
Wang, Qing [5 ]
Guo, Zhengwei [1 ,2 ,3 ]
Zhao, Jianhui [1 ,2 ,3 ]
机构：
[1] Henan Univ, Coll Comp & Informat Engn, Kaifeng 475004, Peoples R China
[2] Henan Univ, Henan Key Lab Big Data Anal & Proc, Kaifeng 475004, Peoples R China
[3] Henan Univ, Henan Engn Res Ctr Intelligent Technol & Applicat, Kaifeng 475004, Peoples R China
[4] Nanjing Univ Aeronaut & Astronaut, Key Lab Radar Imaging & Microwave Photon, Minist Educ, Nanjing 210016, Peoples R China
[5] Air Force Res Inst, Beijing 100085, Peoples R China
来源：
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS | 2022年 / 19卷
基金：
中国国家自然科学基金;
关键词：
Marine vehicles; Time-frequency analysis; Doppler effect; Radar imaging; Imaging; Radar; Doppler radar; Doppler frequency; inverse synthetic aperture radar (ISAR); optimal time selection; ship targets; time-frequency analysis; ALGORITHM;
D O I：
10.1109/LGRS.2021.3103915
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
The equivalent rotation vector synthesized by 3-D nonuniform rotation of ship target leads to the time-varying characteristic of Doppler frequency of ship echo data, which will cause the image to be defocused in azimuth. In order to obtain high-resolution inverse synthetic aperture radar (ISAR) images of ship targets, we developed an optimal time selection algorithm based on time-frequency analysis of multiple scatterers. In this letter, we addressed the challenges of the serious cross-term interference in time-frequency analysis and measuring the stability of Doppler frequency. The time interval with a minimum variation of Doppler frequency was determined by using time-frequency analysis of multiple isolated scatterers and root mean squared error (RMSE). The effectiveness and robustness of the proposed algorithm were evaluated by both simulated and real ISAR data.
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页数：5
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