部分均匀环境中存在干扰时机载雷达广义似然比检测  

Generalized Likelihood Ratio Test for Airborne Radar with Jamming in Partially Homogeneous Environments

作　　者：刘维建[1,2] 谢文冲[2] 王永良[2] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073 [2]空军预警学院重点实验室,武汉430019

出　　处：《电子与信息学报》2013年第8期1820-1826,共7页Journal of Electronics & Information Technology

基　　金：国家杰出青年科学基金(60925005);国家自然科学基金(61102169)资助课题

摘　　要：针对部分均匀环境中存在干扰时的机载雷达检测问题,该文提出一步广义似然比(1S-GLRT)和两步GLRT(2S-GLRT)检测器。基于上述检测器,在小训练样本情况下进一步提出了降秩GLRT(RR-GLRT)和对角加载GLRT(DL-GLRT)。新检测器均能有效地抑制干扰并实现目标检测,在小训练样本情况下RR-GLRT和DL-GLRT比1S-GLRT和2S-GLRT具有更好的检测性能。1S-GLRT和2S-GLRT均具有恒虚警(CFAR)特性,RR-GLRT和DL-GLRT具有渐近CFAR特性。最后通过计算机仿真验证了所提多通道空时自适应检测器的有效性。The one-Step Generalized Likelihood Ratio Test（1S-GLRT） and two-Step GLRT（2S-GLRT） are proposed for the problem of adaptive detection for airborne radar with jamming in partially homogeneous environments.Basing on these detectors,the Reduced-Rank GLRT（RR-GLRT） and Diagonally Loaded（DL-GLRT） are introduced in the situation of low sample support.All the novel detectors can effectively suppress the jamming and detect the targets.Moreover,if the number of the training data is low,the RR-GLRT and DL-GLRT can achieve higher Probabilities of Detection（PD’s） than those of the 1S-GLRT and 2S-GLRT.Both the 1S-GLRT and 2S-GLRT possess the Constant False Alarm Rate（CFAR） property,while the RR-GLRT and DL-GLRT are asymptotically CFAR.The effectivity of the novel multichannel space-time adaptive detectors is verified with computer simulation.

关 键 词：多通道信号检测 干扰 广义似然比 部分均匀环境 对角加载 降秩 

分 类 号：TN957.51[电子电信—信号与信息处理]