Distributed inverse synthetic aperture radar imaging of ship target with complex motion

doi:10.23919/JSEE.2021.000112

Journal of Systems Engineering and Electronics ›› 2021, Vol. 32 ›› Issue (6): 1325-1337.doi: 10.23919/JSEE.2021.000112

收稿日期:2021-02-19 接受日期:2021-11-18 出版日期:2022-01-05 发布日期:2022-01-05

Distributed inverse synthetic aperture radar imaging of ship target with complex motion

Junqiu ZHANG¹(), Yong WANG^1,*(), Xiaofei LU²()

¹ School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin 150001, China
² Jiuquan Satellite Launch Center, Jiuquan 732750, China

Received:2021-02-19 Accepted:2021-11-18 Online:2022-01-05 Published:2022-01-05
Contact: Yong WANG E-mail:m18134366705@163.com;wangyong6012@hit.edu.cn;luxf08@163.com
About author:|ZHANG Junqiu was born in 1996. He received his B.S. degree in electronic information engineering in 2019 from Harbin Institute of Technology (HIT), Harbin, China. He is now pursuing his Ph.D. degree in the School of Electronics and Information Engineering, HIT. His current research interests include inverse synthetic aperture radar (ISAR) imaging and distributed ISAR. E-mail: m18134366705@163.com||WANG Yong was born in 1979. He received his B.S. and M.S. degrees in electronic engineering from Harbin Institute of Technology (HIT), Harbin, China, in 2002 and 2004, respectively. He received his Ph.D. degree in information and communication engineering from HIT in 2008. He is currently a professor with the Institute of Electronic Engineering Technology in HIT. His main research interests are time frequency analysis of nonstationary signal, radar signal processing, and their application in SAR imaging. E-mail: wangyong6012@hit.edu.cn||LU Xiaofei was born in 1981. He received his B.S. and M.S. degrees in electronic engineering from Harbin Institute of Technology (HIT), Harbin, China, in 2002 and 2004, respectively. He received his Ph.D. degree in control theory and control engineering from Tsinghua University in 2012. He is currently an engineer in Jiuquan Satellite Launch Center. His main research interests are target recognition, radar signal processing, and their practical application. E-mail: luxf08@163.com
Supported by:
This work was supported by the National Natural Science Foundation of China (61871146) and the Fundamental Research Funds for the Central Universities(FRFCU5710093720).

摘要/Abstract

Abstract:

For ship targets with complex motion, it is difficult for the traditional monostatic inverse synthetic aperture radar (ISAR) imaging to improve the cross-range resolution by increasing of accumulation time. In this paper, a distributed ISAR imaging algorithm is proposed to improve the cross-range resolution for the ship target. Multiple stations are used to observe the target in a short time, thereby the effect of incoherence caused by the complex motion of the ship can be reduced. The signal model of ship target with three-dimensional (3-D) rotation is constructed firstly. Then detailed analysis about the improvement of cross-range resolution is presented. Afterward, we propose the methods of parameters estimation to solve the problem of the overlap or gap, which will cause a loss of resolution and is necessary for subsequent processing. Besides, the compressed sensing (CS) method is applied to reconstruct the echoes with gaps. Finally, numerical simulations are presented to verify the effectiveness and the robustness of the proposed algorithm.

Key words: complex motion, distributed inverse syntheic aperture radar (ISAR), parameters estimation, compressed sensing (CS)

. [J]. Journal of Systems Engineering and Electronics, 2021, 32(6): 1325-1337.

Junqiu ZHANG, Yong WANG, Xiaofei LU. Distributed inverse synthetic aperture radar imaging of ship target with complex motion[J]. Journal of Systems Engineering and Electronics, 2021, 32(6): 1325-1337.

图/表 18

参考文献 22

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Parameter	Value
Carrier frequency/GHz	3
Bandwidth/MHz	300
Pulse width/μs	1.28
Pulse repetition frequency/kHz	2
CPI/s	0.512

Parameter	Value
Roll amplitude/(°)	1.00
Pitch amplitude/(°)	0.95
Yaw amplitude/(°)	0.85
Roll angular velocity/(rad·s^?1)	0.40
Pitch angular velocity/(rad·s^?1)	0.45
Yaw angular velocity/(rad·s^?1)	0.48

SNR/dB	$\omega {\text{′} }/({\text{rad·s} }^{ - 1})$	$\Delta {\alpha _n}{\text{′} }/{\rm{rad}}$
5	0.0155	0.0070
10	0.0139	0.0065
15	0.0125	0.0062
20	0.0114	0.0059
25	0.0110	0.0054
30	0.0108	0.0052
35	0.0102	0.0051

Distributed inverse synthetic aperture radar imaging of ship target with complex motion

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