Modulated-ISRJ rejection using online dictionary learning for synthetic aperture radar imagery

WEI Shaopeng ¹ZHANG Lei ²LU Jingyue ³LIU Hongwei⁴

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作者信息

1. College of Oceanography and Space Informatics,China University of Petroleum(East China),Qingdao 266580,China;School of Electronics Engineering,Xidian University,Xi'an 710071,China
2. School of Electronics and Communication Engineering,Shenzhen Campus of Sun Yat-sen University,Guangzhou 518107,China
3. School of Computer Science and Technology,Xidian University,Xi'an 710071,China
4. School of Electronics Engineering,Xidian University,Xi'an 710071,China
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Abstract

In electromagnetic countermeasures circumstances,synthetic aperture radar(SAR)imagery usually suffers from severe quality degradation from modulated interrupt sampling repeater jamming(MISRJ),which usually owes considerable coherence with the SAR transmission waveform together with periodical modulation patterns.This paper develops an MISRJ suppression algorithm for SAR imagery with online dictionary learning.In the algorithm,the jamming modulation temporal properties are exploited with extracting and sorting MISRJ slices using fast-time autocorrelation.Online dictionary learning is fol-lowed to separate real signals from jamming slices.Under the learned representation,time-varying MISRJs are suppressed effectively.Both simulated and real-measured SAR data are also used to confirm advantages in suppressing time-varying MISRJs over traditional methods.

Key words

synthetic aperture radar(SAR)/modulated interrupt sampling jamming(MISRJ)/online dictionary learning

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基金项目

国家自然科学基金(61771372)

国家自然科学基金(61771367)

国家自然科学基金(62101494)

National Outstanding Youth Science Fund Project(61525105)

深圳市科技计划(KQTD20190929172704911)

航空科学基金(2019200M1001)

出版年

2024

系统工程与电子技术(英文版)

中国航天科工防御技术研究院中国宇航学会中国系统工程学会中国系统仿真学会

系统工程与电子技术(英文版)

CSTPCD

影响因子：0.64

ISSN：1004-4132

参考文献量39

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