大掠射角下幅相极化特征融合雷达导引头舰船检测方法

doi:10.12305/j.issn.1001-506X.2025.04.09

Abstract

Abstract:

The sea surface target signal at high grazing angle is often submerged in the strong sea clutter, which brings a severe challenge to the target detection of radar seeker. In order to improve the performance of radar detection of weak targets at high grazing angle, a target detection method of sea surface targets based on multi-feature fusion is proposed. Firstly, it is found that there are big differences between sea clutter and ship in four amplitude-phase polarization features, including the mean of unfolded phase difference, the mean and the difference of co-polarization ratio phase, and the ratio of average co-polarization amplitude, by analyzing the experimental data of radar seeker working at high grazing angle. Secondly, combined with the support vector machine (SVM) method, it is verified that the sea clutter and ship target with sea clutter are more separable in the four-dimensional feature space in comparison with the existing feature sets. Then the false alarm control is applied to the classifier, a sea surface targets detection method based on the fusion of amplitude and phase features is proposed. Finally, the experimental data are used to verify that the proposed method can effectively achieve the detection of sea surface targets at high grazing angle.

Key words: target detection, sea clutter, high grazing angle, radar seeker

CLC Number:

TN974

Jingwen HAN, Yong YANG, Jing LIAN, Wei WANG. Ship detection method of amplitude-phase polarization feature fusion for radar seeker at high grazing angle[J]. Systems Engineering and Electronics, 2025, 47(4): 1127-1135.

Figures/Tables 16

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参数	特征集
参数	本文	文献[19]	文献[21]	文献[23]
平均检测概率	0.897 8	0.137 6	0.159 4	0.366 2

拟定虚警	训练虚警	测试虚警
0.10	0.091 4	0.109 4
0.05	0.053 2	0.058 1
0.01	0.010 6	0.009 7

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[2]	Xiaoyu REN, Ruiqi LIN, Yunkai DENG, Weiming TIAN, Cheng HU. Slow weak target detection method of ground-based radar based on mode decomposition [J]. Systems Engineering and Electronics, 2025, 47(1): 70-80.
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[6]	Jing LIAN, Yong YANG, Xiaoxia XIE, Xuesong WANG. Analysis of radar seeker sea-surface echoes at a high grazing angle [J]. Systems Engineering and Electronics, 2024, 46(5): 1535-1543.
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Ship detection method of amplitude-phase polarization feature fusion for radar seeker at high grazing angle

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