一种改进的自适应恒虚警检测器  

An improved adaptive CFAR detector

作　　者：张永光 荣锋[1,2] Zhang Yongguang;Rong Feng(School of Electronics and Information Engineering,Tiangong University,Tianjin 300387,China;Tianjin Key Laboratory of Optoelectronic Detection Technology and System,Tianjin 300387,China)

机构地区：[1]天津工业大学电子与信息工程学院,天津300387 [2]天津市光电检测技术与系统重点实验室,天津300387

出　　处：《电子测量技术》2022年第11期83-89,共7页Electronic Measurement Technology

基　　金：天津市科委青年基金(15JCQNJC42100);天津市科技特派员项目(16JCTPJC48100,16JCTPJC47200)资助。

摘　　要：为了解决传统自适应恒虚警检测器在多目标环境下检测性能下降的问题,对传统基于指数变换的恒虚警检测器(VI-CFAR)的选择策略进行改进,提出了一种改进的自适应恒虚警检测器-VIHCES-CFAR。在杂波边缘环境下和多目标干扰环境下分别选择非均匀杂波估计恒虚警检测器(HCE-CFAR)和交互式恒虚警检测器(S-CFAR)进行处理,提高了多目标环境下的目标检测能力,有效避免了目标遮蔽的问题。实验结果表明,在检测概率为0.5的条件下VIHCES-CFAR的信噪比相对于SVI-CFAR低0.05 dB,在多目标环境下检测概率为99.78%,在杂波边缘环境下检测概率控制在10左右,具有稳定的抗干扰能力和良好的虚警控制能力。并通过实测数据验证了VIHCES-CFAR检测器在解决目标遮蔽问题上的有效性。In order to solve the problem of decreasing detection performance of traditional adaptive constant false alarm detector(CFAR) in multi-target environment, the selection strategy of traditional exponential transform-based CFAR(VI-CFAR) is improved. An improved adaptive constant false alarm detector VIHCES-CFAR is proposed. Heterogeneous Clutter Estimating CFAR(HCE-CFAR) and Switching CFAR(S-CFAR) are selected in Clutter edge environment and multi-object interference environment respectively, which improves the ability of target detection in multi-target environment and effectively avoids the problem of target masking. Experimental results show that the SNR of VIHCES-CFAR is 0.05 dB lower than that of SVI-CFAR at the detection probability of 0.5, and the detection probability of VIHCES-CFAR is 99.78% in the multi-target environment, and the detection probability of VIHCES-CFAR is about 10in the clutter edge environment. It has stable anti-interference ability and good false alarm control ability. The effectiveness of VIHCES-CFAR detector in solving the problem of target masking is verified by the measured data.

关 键 词：雷达目标检测 多目标环境 恒虚警处理 自适应检测 AWR1642 

分 类 号：TN957.5[电子电信—信号与信息处理]