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

doi:10.23919/JSEE.2023.000076

Journal of Systems Engineering and Electronics ›› 2024, Vol. 35 ›› Issue (2): 316-329.doi: 10.23919/JSEE.2023.000076

• ELECTRONICS TECHNOLOGY • Previous Articles

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

Shaopeng WEI¹^,², Lei ZHANG³^,*(), Jingyue LU⁴, Hongwei LIU²

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

Received:2022-01-30 Accepted:2023-05-09 Online:2024-04-18 Published:2024-04-18
Contact: Lei ZHANG E-mail:zhanglei57@mail.sysu.edu.cn
About author:
WEI Shaopeng was born in 1993. He received his B.S. degree in electronic engineering from Xidian University, Xi ’an, China, in 2017, and Ph.D. degree in signal processing at the National Laboratory of Radar Signal Processing, Xidian University, in 2022. He is a lecturer in China University of Petroleum (East China). His rearch interests are radar signal processing and radar imaging.E-mail: spwei@wpc.edu.cn

ZAHNG Lei was born in 1984. He received his Ph.D. degree in signal processing from Xidian University, Xi’an, China in 2012. From 2012 to 2019, he was an associate professor with the National Laboratory of Radar Signal Processing, Xidian University. He is working as a professor with the School of Electronics and Communication Engineering, Sun Yat-Sen University, Guangzhou, China. His major research interests are radar imaging synthetic aperture radar (SAR)/inverse SAR (ISAR) and motion compensation. E-mail: zhanglei57@mail.sysu.edu.cn

LU Jingyue was born in 1994. He received his Ph.D. degree in signal processing from Xidian University, Xi’an, China, in 2021. He is currently a prospective associate professor with the School of Computer Science and Technology, Xidian University, Xi ’an, China. His research interest is radar imaging. E-mail: lujingyue@xidian.edu.cn

LIU Hongwei was born in 1971. He received his M.S. and Ph.D. degrees in electronic engineering from Xidian University, Xi ’an, China, in 1995 and 1999, respectively. From 2001 to 2002, he was a visiting scholar with the Department of Electrical and Computer Engineering, Duke University, Durham, NC, USA. He works as a professor with the National Laboratory of Radar Signal Processing, Xidian University. His research interests include radar automatic target recognition, radar signal processing, and adaptive signal processing. E-mail: hwliu@xidian.edu.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (61771372; 61771367; 62101494), the National Outstanding Youth Science Fund Project (61525105), Shenzhen Science and Technology Program (KQTD20190929172704911), and the Aeronautical Science Foundation of China (2019200M1001).

Abstract

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 followed 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

Shaopeng WEI, Lei ZHANG, Jingyue LU, Hongwei LIU. Modulated-ISRJ rejection using online dictionary learning for synthetic aperture radar imagery[J]. Journal of Systems Engineering and Electronics, 2024, 35(2): 316-329.

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Parameter	Value
${f_c}$/GHz	6
$B$/MHz	200
${T_p}$/μs	20
${F_s}$/MHz	200
Pulse repetition frequency/Hz	600

Parameter	Value
${f_c}$	Ka
$B$/MHz	100
${T_p}$/μs	$10$
${F_s}$/MHz	125
Pulse repetition frequency/Hz	600

Method	Entropy	Contrast
Method 1	8.8132	2.0085
Method 2	13.3293	0.8413
Method 3	9.5901	1.6937

Method	P1	P2	P3
Method 1	53.0151	45.7266	39.4305
Method 2	51.5026	43.3872	37.8235
Method 3	17.8297	14.1262	19.2943

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

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