Non-line-of-sight target localization in unknown L-shaped corridor based UWB MIMO radar

doi:10.23919/JSEE.2025.000021

Journal of Systems Engineering and Electronics ›› 2025, Vol. 36 ›› Issue (3): 681-693.doi: 10.23919/JSEE.2025.000021

• DEFENCE ELECTRONICS TECHNOLOGY • Previous Articles

Non-line-of-sight target localization in unknown L-shaped corridor based UWB MIMO radar

Chao JIA¹(), Caiping SONG²(), Lingyu WANG²(), Guolong CUI¹(), Shisheng GUO¹(), Jie GU³^,*(), Yong JIA²()

¹ School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
² School of Mechanical and Electrical Engineering, Chengdu University of Technology, Chengdu 610059, China
³ Science and Technology on Electronic Information Control Laboratory, Chengdu 610036, China

Received:2023-04-17 Online:2025-06-18 Published:2025-07-10
Contact: Jie GU E-mail:jiachao@uestc.edu.cn;songcaiping0304@163.com;272096315@qq.com;cuiguolong@uestc.edu.cn;ssguo@uestc.edu.cn;13558699175@qq.com;jiayong2014@cdut.edu.cn
About author:
JIA Chao was born in 1986. He received his B.S. degree in electronic engineering and M.S. degree in signal and information processing from the University of Electronic Science and Technology of China (UESTC), Chengdu, China, in 2010 and 2013, respectively. He is currently pursuing his Ph.D. degree with the School of Information and Communication Engineering in UESTC. His research interests include non-line-of-sight (NLOS) target detection and intelligent radar signal processing. E-mail: jiachao@uestc.edu.cn

SONG Caiping was born in 2000. She received her B.S. degree in information engineering from Chengdu University of Technology, Chengdu, China, in 2022. She is currently pursuing her M.S. degree at Chengdu University of Technology, Chengdu, China. Her research interests include radar signal processing and multipath detection. E-mail: songcaiping0304@163.com

WANG Lingyu was born in 1998. She received her B.S. degree in electronic and information engineering from Panzhihua University, Panzhihua, China, in 2020. She is currently pursuing her M.S. degree at Chengdu University of Technology, Chengdu, China. Her research interests include radar signal processing and multipath detection. E-mail: 272096315@qq.com

CUI Guolong was born in 1982. He received his B.S. degree in electronic information engineering and M.S. and Ph.D. degrees in signal and information processing from the University of Electronic Science and Technology of China (UESTC), Chengdu, China, in 2005, 2008, and 2012, respectively. From September 2013 to July 2018, he was an associate professor with UESTC, where he has been a professor since August 2018. His research interests include cognitive radar, array signal processing, multiple-input multiple-output (MIMO) radar, and non-line-of-sight (NLOS) target detection. E-mail: cuiguolong@uestc.edu.cn

GUO Shisheng was born in 1991. He received his B.S. degree in communication engineering from Nanchang Hangkong University, Nanchang, China, in 2013, and Ph.D. degree in signal and information processing from the University of Electronic Science and Technology of China (UESTC), Chengdu, China, in 2019. He is currently an associate researcher with the School of Information and Communication Engineering, UESTC. His research interests include through-the-wall radar imaging, signal analysis, and non-line-of-sight (NLOS) target detection. E-mail: ssguo@uestc.edu.cn

GU Jie was born in 1974. He received his B.S. degree in information engineering and Ph.D. degree in signal and information processing from the University of Electronic Science and Technology of China, Chengdu, China, in 1997 and 2004, respectively. He is currently a researcher with the Science and Technology on Electronic Information Control Laboratory, Chengdu, China. His current research interests include adaptive array signal processing, and cognitive radio signal processing. E-mail: 13558699175@qq.com

JIA Yong was born in 1985. He received his Ph.D. degree in signal and information processing from University of Electronic Science and Technology of China, Chengdu, China, in 2014. Currently, he is a professor with the School of Mechanical and Electrical Engineering at Chengdu University of Technology, Chengdu, China. His research interests include through-wall radar signal processing, non-line-of-sight radar detection and array signal processing. E-mail: jiayong2014@cdut.edu.cn
Supported by:
This work was supported by National Natural Science Foundation of China (U20B2070; 62001091), and Sichuan Science and Technology Program (2022YFS0531).

Abstract

Abstract:

Most of the existing non-line-of-sight (NLOS) localization methods depend on the layout information of the scene which is difficult to be obtained in advance in the practical application scenarios. To solve the problem, an NLOS target localization method in unknown L-shaped corridor based ultra-wideband (UWB) multiple-input multiple-output (MIMO) radar is proposed in this paper. Firstly, the multipath propagation model of L-shaped corridor is established. Then, the localization process is analyzed by the propagation characteristics of diffraction and reflection. Specifically, two different back-projection imaging processes are performed on the radar echo, and the positions of focus regions in the two images are extracted to generate candidate targets. Furthermore, the distances of propagation paths corresponding to each candidate target are calculated, and then the similarity between each candidate target and the target is evaluated by employing two matching factors. The locations of the targets and the width of the corridor are determined based on the matching rules. Finally, two experiments are carried out to demonstrate that the method can effectively obtain the target positions and unknown scene information even when partial paths are lost.

Key words: non-line-of-sight (NLOS) localization, unknown L-shaped corridor, multiple-input multiple-output (MIMO) radar, back-projection imaging, multipath propagation

Chao JIA, Caiping SONG, Lingyu WANG, Guolong CUI, Shisheng GUO, Jie GU, Yong JIA. Non-line-of-sight target localization in unknown L-shaped corridor based UWB MIMO radar[J]. Journal of Systems Engineering and Electronics, 2025, 36(3): 681-693.

Figures/Tables 13

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Parameter	Value
Start frequency/GHz	1.6
End frequency/GHz	2.2
Step frequency/MHz	2
Number of steps	301
Radiation power/dBm	18
Pulse repetition interval/s	0.03

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Non-line-of-sight target localization in unknown L-shaped corridor based UWB MIMO radar

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