Robust dual-channel correlation algorithm for complex weak target detection with wideband radar

doi:10.23919/JSEE.2023.000138

Journal of Systems Engineering and Electronics ›› 2023, Vol. 34 ›› Issue (5): 1130-1146.doi: 10.23919/JSEE.2023.000138

收稿日期:2023-04-18 出版日期:2023-10-18 发布日期:2023-10-30

Robust dual-channel correlation algorithm for complex weak target detection with wideband radar

Yan DAI¹(), Dan LIU¹^,*(), Chuanming LI¹(), Shaopeng WEI²(), Qingrong HU³

¹ Beijing Institute of Radio Measurement, Beijing 100854, China
² College of Oceanography and Space Informatics, China University of Petroleum (East China), Qingdao 257099, China
³ Defense Technology Academy of China Aerospace Science and Industry Corporation Limited, Beijing 100070, China

Received:2023-04-18 Online:2023-10-18 Published:2023-10-30
Contact: Dan LIU E-mail:hitdy2012@126.com;liudan_nicole@263.net;lichuanming1116@163.com;spw_xd@163.com
About author:
DAI Yan was born in 1994. She received her B.S. degree from Harbin Institute of Technology in 2016, and Ph.D. degree from Beijing Institute of Radio Measurement in 2023. Her research interests include radar signal processing and target detection. E-mail: hitdy2012@126.com

LIU Dan was born in 1974. She received her B.S. and Ph.D. degrees from Beijing Institute of Technology in 1996 and 2001. Her research interests include precision measurement radar system and target detection. E-mail: liudan_nicole@263.net

LI Chuanming was born in 1993. He received his B.S. degree from North University of China in 2015, and M.S. degree from Beijing Institute of Radio Measurement in 2021. His research interests include radar signal processing and radar imaging. E-mail: lichuanming1116@163.com

WEI Shaopeng was born in 1993. He received his B.S. degree in electronic engineering from Xidian University, Xi ’an, China, in 2017. He received his Ph.D. degree in signal processing at the National Laboratory of Radar Signal Processing, Xidian University, in 2022. He is the lecturer in China University of Petroleum (East China). His rearch interests are radar signal processing and radar imaging. E-mail: spw_xd@163.com

摘要/Abstract

Abstract:

In the scene of wideband radar, due to the spread of target scattering points, the attitude and angle of view of the target constantly change in the process of moving. It is difficult to predict, and the actual echo of multiple scattered points is not fully matched with the transmitted signal. Therefore, it is challenging for the traditional matching filter method to achieve a complete matching effect in wideband echo detection. In addition, the energy dispersion of complex target echoes is still a problem in radar target detection under broadband conditions. Therefore, this paper proposes a wideband target detection method based on dual-channel correlation processing of range-extended targets. This method fully uses the spatial distribution characteristics of target scattering points of echo signal and the matching characteristics of the dual-channel point extension function itself. The radial accumulation of wideband target echo signal in the complex domain is realized through the adaptive correlation processing of a dual-channel echo signal. The accumulation effect of high matching degree is achieved to improve the detection probability and the performance of wideband detection. Finally, electromagnetic simulation experiments and measured data verify that the proposed method has the advantages of high signal to noise ratio (SNR) gain and high detection probability under low SNR conditions.

Key words: wideband radar, target detection, dual-channel, correlation

. [J]. Journal of Systems Engineering and Electronics, 2023, 34(5): 1130-1146.

Yan DAI, Dan LIU, Chuanming LI, Shaopeng WEI, Qingrong HU. Robust dual-channel correlation algorithm for complex weak target detection with wideband radar[J]. Journal of Systems Engineering and Electronics, 2023, 34(5): 1130-1146.

图/表 30

参考文献 30

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Parameter	Symbol	Value
Carrier frequency/GHz	$ {f_0} $	10
Bandwidth/GHz	$ B $	1
Sub-pulse width/μs	$ {T_p} $	100
Sampling rate/GHz	$ {f_s} $	2
Target distance/km	$ R $	100
Antenna aperture/m	$ D $	10

Number	Signal power	Noise power	SNR	SNR gain
1	195.0	178.6	16.4	4.4
2	192.7	178.3	14.4	2.4
3	195.4	178.3	17.1	5.1
4	195.6	179.0	16.6	4.6
5	193.2	179.4	13.8	1.8
6	196.1	178.2	17.9	5.9
7	197.4	178.2	19.2	7.2
8	197.1	178.8	18.3	6.3

SNR₁	SNR_c	SNR gain
8	8.8	0.8
9	10.9	1.9
10	12.7	2.7
11	14.9	3.9
12	16.7	4.7
13	18.6	5.6
14	20.7	6.7
15	22.7	7.7

Detector	SNR/dB
Detector	5	8	11	14	17	20	22
MN detector	0	0	0	0	0	0	0
OS detector	0	0	0	0	0	0	0
RI detector	0	0	0	0	0	0	0
Dcc detector	1	1	1	1	1	1	1

Robust dual-channel correlation algorithm for complex weak target detection with wideband radar

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