摘要
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(CCGLRT)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.
When the compound-Gaussian clutters are cluttered into groups of data with one and the same value of the tex-ture ,the homogeneous clutter-clustered model is generalized ,and a generalized clutter clustered model is established .Moreover ,a generalized likelihood ratio test detector based on the generalized clutter-clustered （GCC-GLRT ） is proposed ,and the formula relat-ing false alarm probability to detection threshold is deduced .The GCC-GLRT solves the problem that the CC-GLRT is not CFAR in inhomogeneous clutter-clustered background .The simulation results show that the GCC-GLRT can overcome the collapsing loss of the NSDD-GLRT detecting spare scatterers target and improve the detection performance of the detector .
出处
《电子学报》
EI
CAS
CSCD
北大核心
2013年第12期2367-2373,共7页
Acta Electronica Sinica
基金
国家自然科学基金(No.61032001
No.61102166)
新世纪优秀人才支持计划(No.NCET-11-0872)
关键词
复合高斯杂波
球不变随机向量
杂波分组
广义似然比检验
compound-Gaussian clutter
spherically invariant random vector
clutter-clustered
generalized likelihood ratio test
