| 非高斯杂波背景中的两个距离扩展目标检测器 |
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| 引用本文： | 顾新锋,简涛,何友,郝晓琳.非高斯杂波背景中的两个距离扩展目标检测器[J].宇航学报,2012,33(5):648-654. |
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| 作者姓名： | 顾新锋 简涛 何友 郝晓琳 |
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| 作者单位： | 1. 海军航空工程学院信息融合技术研究所,烟台,264001
2. 烟台电力设计院,烟台,264001 |
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| 基金项目： | 国家自然科学基金，新世纪人才支持计划，海军航空工程学院青年科研基金 |
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| 摘 要： | 针对采用球不变随机向量(SIRV)建模的非高斯杂波背景中检测具有稀疏散射点的距离扩展目标问题,先假设目标强散射点的位置信息已知,采用广义似然比检验(GLRT)理论,提出了基于散射点位置的GLRT(SL-GLRT)检测器.然后,采用门限法估计散射点的位置信息,提出了双门限恒虚警率(DT-CFAR)检测器,推导了虚警概率与检测门限关系的解析表达式,并给出门限的确定方法.与现有方法相比,散射点位置信息已知时,SL-GLRT具有最佳的检测性能,散射点位置信息未知时,DT-CFAR具有较好的鲁棒性.
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| 关 键 词： | 非高斯杂波 距离扩展目标 恒虚警率 检测 |
Two Detectors of Range-Spread Target in Non-Gaussian Clutter |
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| GU Xin-feng
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JIAN Tao
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HE You
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HAO Xiao-lin.Two Detectors of Range-Spread Target in Non-Gaussian Clutter[J].Journal of Astronautics,2012,33(5):648-654. |
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| Authors: | GU Xin-feng JIAN Tao HE You HAO Xiao-lin |
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| Institution: | 1.Research Institute of Information Fusion,Naval Aeronautical and Astronautical University,Yantai 264001,China; 2.Yantai Electricity Design CO.LTD,Yantai 264001,China) |
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| Abstract: | For the problem of detecting range-spread target with spare scatterers in non-Gaussian clutter modeled as spherically invariant random vector(SIRV),it is assumed that the location information of scatterers is known and a generalized likelihood ratio test detector based on scatterers location(SL-GLRT) is proposed.Then the threshold method is used to estimate the location information of scatterers,and a two thresholds constant false alarm ratio detector(TD-CFAR) is proposed.The analytical expression relating false alarm probability to detection threshold is deduced,and a method for determining the threshold is given.The results show that the SL-GLRT has the best detection performance when the information of scatterers is known,and the DT-CFAR is more robust when it is unknown. |
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| Keywords: | Non-Gaussian clutter Range-spread target Constant false alarm rate Detection |
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