广义逆高斯纹理杂波背景下的自适应失配检测器

范一飞; 陈铎; 粟嘉; 郭子薰; 陶明亮; 王伶

doi:10.11999/JEIT231440

广义逆高斯纹理杂波背景下的自适应失配检测器

doi: 10.11999/JEIT231440

范一飞^1, ,,
陈铎^{1, 2},
粟嘉¹,
郭子薰¹,
陶明亮¹,
王伶¹

1.
西北工业大学电子信息学院西安 710072
2.
中国航空工业集团公司洛阳电光设备研究所洛阳 471000

基金项目: 国家自然科学基金(62171379,62301435)，中国博士后科学基金(2023M732870)，博士后创新人才支持计划(BX20230497)，上海航天科技创新基金(SAST2023-044)

详细信息

作者简介:
范一飞：男，副研究员，博士，主要研究方向为雷达信号处理、海面微弱目标检测

陈铎：男，硕士，要研究方向为海杂波背景下的微弱目标检测

粟嘉：男，副教授，博士，主要研究方向为雷达信号处理、雷达干扰抑制

郭子薰：女，博士后，博士，主要研究方向为雷达信号处理、海面微弱目标检测

陶明亮：男，副教授，博士，主要研究方向为雷达信号处理、雷达干扰抑制

王伶：男，教授，博士，主要研究方向为阵列信号处理、抗干扰处理

通讯作者:
范一飞　fanyifei888@163.com

中图分类号: TN95
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- 被引次数: 0
出版历程
- 收稿日期: 2024-01-02
- 修回日期: 2024-04-24
- 网络出版日期: 2024-05-15

Adaptive Detectors for Mismatched Signal under Sea Clutter Background with Generalized Inverse Gaussian Texture

FAN Yifei^{1
, ,},
CHEN Duo^{1, 2},
SU Jia¹,
GUO Zixun¹,
TAO Mingliang¹,
WANG Ling¹

1.
School of Electronics and Information, Northwestern Polytechnical University, Xi’an 710072, China
2.
Luoyang Institute of Electro-Optical Equipment, Aviation Industry of China, Luoyang 471000, China

Funds: National Natural Science Foundation of China (62171379, 62301435), China Postdoctoral Science Foundation (2023M732870), Postdoctoral Innovation Talents Support Program (BX20230497), ShangHai Aerospace Science and Technology Innovation Fund (SAST2023-044)

摘要

摘要: 针对雷达对海探测过程中理论导向矢量与实际导向矢量之间不匹配导致的虚警概率升高的问题，该文在复合高斯模型(CGM)下设计自适应失配检测器。为了抑制失配信号，在零假设中引入与理论导向矢量正交的虚拟信号，从而给出存在失配信号的目标检测模型。将CGM的纹理分量建模为广义逆高斯分布，分别基于两步广义似然比(GLRT)和最大后验GLRT(MAP GLRT)准则发展类似于自适应波束形成器正交抑制检测(ABORT)的自适应失配检测器，并通过理论证明所提失配检测器对散斑协方差矩阵和目标多普勒导向矢量具有恒虚警(CFAR)特性。仿真和实测数据实验结果表明，所提失配检测器在导向矢量匹配情况下的检测性能和失配情况下的抗失配性能之间具有良好的折衷。
- 海杂波 /
- 广义逆高斯纹理复合高斯模型 /
- 失配检测 /
- 自适应波束形成器正交抑制检测
Abstract: Considering mismatched problem between theoretical steering vector and actual steering vector causes false-alarm-rate increase in the process of maritime radar detection, the adaptive mismatched detectors are studied under Compound Gaussian Model (CGM). In order to reject mismatched signal, the fictitious signal orthogonal to theoretical steering vector is introduced in the hull hypothesis, and a target detection with mismatched signal is given. The texture component of CGM is represented by generalized inverse distribution, and the Adaptive Beamformer Orthogonal Rejection Test (ABORT) are developed based on two-step Generalized Likelihood Ratio Test (GLRT) and Maximum A Posteriori GLRT (MAP GLRT) criterions respectively. Both the proposed detectors are testified to be Constant False Alarm (CFAR) characteristics for speckle covariance matrix and target doppler steering vector. Experimental results based on simulated and real measured sea clutter data indicate that the proposed mismatched detectors show preferable target detection performance under the matched steering vector condition and anti-mismatch capability under the mismatched steering vector condition.

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图 1 失配示意图

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图 2 在匹配情况下提出的检测器与对比检测器的目标检测性能

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图 3 在失配情况下提出的检测器与对比检测器的目标检测性能

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图 4 检测器虚警概率曲线

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图 5 实测海杂波数据背景下检测器性能分析

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图 6 检测器抗失配性能对比

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表 1 导向矢量匹配时上述检测器检测概率达到$90\% $时所需要的SCR(dB)

检测器类型 ANMF ABORT GIG-GLRT MAP-GLRT α-AMF A-CGGIG AM-GIGIG

信杂比 8.40 7.61 5.70 5.71 5.82 5.80 5.93

下载: 导出CSV

表 2 导向矢量匹配时上述检测器检测概率达到$90\% $时所需要的SCR(dB)

检测器类型 ANMF ABORT GIG-GLRT MAP-GLRT α-AMF A-CGGIG AM-GIGIG

信杂比 12.88 12.16 11.34 11.50 11.43 11.37 11.53

下载: 导出CSV

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