A processing technique for accurate target angle estimation using wideband monopulse radars

doi:10.23919/JSEE.2024.000091

Journal of Systems Engineering and Electronics ›› 2025, Vol. 36 ›› Issue (2): 370-379.doi: 10.23919/JSEE.2024.000091

• • 上一篇

收稿日期:2024-01-16 接受日期:2024-07-02 出版日期:2025-04-18 发布日期:2025-05-20

A processing technique for accurate target angle estimation using wideband monopulse radars

Chengzeng CHEN¹^,²^,³(), Dan LIU²^,³(), Xiaojian XU¹^,*(), Yaobing LU²()

¹ School of Electronics and Information Engineering, Beihang University, Beijing 100191, China
² Beijing Institute of Radio Measurement, Beijing 100083, China
³ Pinghu Labortory, Pinghu 314200, China

Received:2024-01-16 Accepted:2024-07-02 Online:2025-04-18 Published:2025-05-20
Contact: Xiaojian XU E-mail:chenchengzeng66@163.com;liudan_nicole@263.net;xiaojianxu@buaa.edu.cn;luyaobing65@163.com
About author:
CHEN Chengzeng was born in 1987. He received his M.S. degree from Xidian University, Xi’an, China, in 2013. He is currently working toward his Ph.D. degree in Beihang University. His research interests are radar signal processing and radar imaging. E-mail: chenchengzeng66@163.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 are radar signal processing and radar imaging. E-mail: liudan_nicole@263.net

XU Xiaojian was born in 1963. He received his Ph.D. degree in electrical engineering from Nebraska-Lincoln in 2002. He is currently a professor with the Beihang University. His rearch interests are radar signal processing and radar imaging. E-mail: xiaojianxu@buaa.edu.cn

LU Yaobing was born in 1965. He received his Ph.D. degree in communication and information system from Beihang University in 2014. He is currently a researcher with the Beijing Institute of Radio Measurement. His rearch interests are radar signal processing and target detection. E-mail: luyaobing65@163.com

摘要/Abstract

Abstract:

Accurate target angle estimation is one of the challenges for wideband radars due to the fact that target occupies multiple range bins, resulting in lower energy or signal to noise ratio in a single range bin. This paper proposes a processing technique for enhanced accuracy of target angle estimates for wideband monopulse radars. Firstly, to accumulate the energy of the received echo signals from different scatterers on a target, the phase difference between different scatterers on a target is estimated using the minimum entropy phase estimation method combining with the correlation between adjacent pulses. Then, the monopulse ratio is obtained by using the signals from the accumulated sum and difference channels. The target angle is estimated by weighting the accumulated echo energy for accuracy enhancement. Experimental results based on both numerical simulation and measured data are presented to validate the effectiveness of the proposed technique.

Key words: wideband radar, target angle estimation, adjacent pulses, correlation

. [J]. Journal of Systems Engineering and Electronics, 2025, 36(2): 370-379.

Chengzeng CHEN, Dan LIU, Xiaojian XU, Yaobing LU. A processing technique for accurate target angle estimation using wideband monopulse radars[J]. Journal of Systems Engineering and Electronics, 2025, 36(2): 370-379.

图/表 13

参考文献 30

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Parameter	Value
Carrier frequency/GHz	35
Bandwidth/GHz	2
Pulse width/μs	400
Sampling rate/GHz	4
Target distance/km	300
Beam width/(°)	1
Scatterer number	4
SNR of each scatterer/dB	12
Target angle/(°)	0.4
Adjacent pulse number	4

Parameter	Value
Carrier frequency/GHz	35
Bandwidth/GHz	2
Pulse width/μs	400
Sampling rate/GHz	4
Target distance/km	300
Beam width/(°)	1
SNR of maximum scatterer/dB	12
Target angle/(°)	0.4
Minimum rotation angle/(°)	0.01

A processing technique for accurate target angle estimation using wideband monopulse radars

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