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.

引用

页数：5

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