Wideband radar detector based on characteristic parameters of echoes

doi:10.21629/JSEE.2019.05.08

Journal of Systems Engineering and Electronics ›› 2019, Vol. 30 ›› Issue (5): 897-904.doi: 10.21629/JSEE.2019.05.08

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Wideband radar detector based on characteristic parameters of echoes

Jiayun CHANG(), Xiongjun FU*(), Wen JIANG(), Min XIE()

School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China

Received:2018-01-24 Online:2019-10-08 Published:2019-10-09
Contact: Xiongjun FU E-mail:824400828@qq.com;fuxiongjun@bit.edu.cn;jwen912@126.com;xiemin@bit.edu.cn
About author:CHANG Jiayun was born in 1989. She received her master degree from Beijing Institute of Technology (BIT), China, in 2016. Currently, she is pursuing her Ph.D. degree in the School of Information and Electronics, BIT. Her research interests include automatic target recognition and radar signal processing. E-mail: 824400828@qq.com|FU Xiongjun was born in 1978. He received his B.E. degree and Ph.D. degree from Beijing Institute of Technology (BIT), China, in 2000 and 2005 respectively. He is currently the vice dean of the School of Information and Electronics, Beijing Institute of Technology, and an associate professor and Ph.D. supervisor with BIT. His current research interests include radar system, radar signal processing, waveform design, and automatic target recognition. E-mail: fuxiongjun@bit.edu.cn|JIANG Wen was born in 1991. He received his master degree from Zhengzhou University, China, in 2016. Currently, He is pursuing his Ph.D. degree in the School of Information and Electronics, Beijing Institute of Technology (BIT). His research interests include radar signal processing and radar signal sorting. E-mail: jwen912@126.com|XIE Min was born in 1976. He received his Ph.D. degree from Beijing Institute of Technology (BIT), China, in 2006. Currently, his research interests include high-speed real-time signal processing, radar signal processing, and signal acquisition and storage. E-mail: xiemin@bit.edu.cn
Supported by:
the National Natural Science Foundation of China(61571043);the 111 Project of China(B14010);This work was supported by the National Natural Science Foundation of China (61571043) and the 111 Project of China (B14010)

Abstract

Abstract:

The statistical characterization of radar range cells with the target signals is much more distinct than that of the range cells with noise-only signals. Hence, the quasi-optimal detection principle based on the characteristic parameters of echo signals is adopted to develop a detector of range-spread targets in Gaussian noise. Firstly, the characteristic parameters of the return signals in the entire range profiles of radar are investigated. Secondly, the clustering analysis of the characteristic parameter matrix is discussed to extract the test statistic of echoes. Finally, the probabilities of detection and false alarm of the proposed detector are provided. Theoretical analysis shows that the proposed detector does not need the prior knowledge about the spatial distribution of the target scattering centers in practical scenarios, and it is simple and robust even in low signal-to-noise ratio (low-SNR) scenarios. Monte Carlo (MC) simulations reveal that the detection performance of the proposed detector outperforms the conventional detectors.

Key words: wideband radar, mathematical statistics, characteristic parameter, clustering analysis

Jiayun CHANG, Xiongjun FU, Wen JIANG, Min XIE. Wideband radar detector based on characteristic parameters of echoes[J]. Journal of Systems Engineering and Electronics, 2019, 30(5): 897-904.

Figures/Tables 11

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Parameter	Name	Value
Radar parameter	Signal amplitude/V	1
	Carrier frequency/GHz	10
	Bandwidth/MHz	500
	Pulse duration/${\rm{ \mathsf{ μ} s}}$	10
	Pulse repetition frequency (PRF)/Hz	200
Target parameter	Original distance to radar/m	5 000
	Radial velocity/m$\cdot$s$^{ - 1}$	0
	Target radial length/m	30
	Number of scatters	10
Sampling parameter	Width of range gate/${\rm{ \mathsf{ μ} s}}$	30.2
	Ending time/${\rm{ \mathsf{ μ} s}}$	58.53
	Starting time/${\rm{ \mathsf{ μ} s}}$	28.33
	Sampling rate/MHz	625

Detector	Multiplicative times	Plus times
EI detector	7.8e+10	1.6e+11
SDD-GLRT	4.6e+9	8.4e+9
Proposed detector	5.0e+8	3.5e+8

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Wideband radar detector based on characteristic parameters of echoes

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