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电子学报  2013 

局部均匀背景中距离扩展目标的GLRT检测器及性能分析

DOI: 10.3969/j.issn.0372-2112.2013.12.008, PP. 2367-2373

Keywords: 复合高斯杂波,球不变随机向量,杂波分组,广义似然比检验

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Abstract:

在复合高斯杂波满足局部均匀的背景下,对均匀杂波分组模型进行推广,建立了广义杂波分组模型.进一步,利用广义似然比检验(GLRT)原理,提出了距离扩展目标的基于广义杂波分组的GLRT检测器(GCC-GLRT),并推导了检测器虚警概率与检测门限关系的表达式.GCC-GLRT有效地解决了基于均匀杂波分组的GLRT检测器(CC-GLRT)在非均匀杂波分组背景下不具备CFAR特性的问题.仿真结果还表明,对于稀疏散射点目标,在合适的杂波分组情况下,GCC-GLRT能有效克服采用NSDD-GLRT检测器出现的“坍塌损失”,改善检测器的检测性能.

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