摘要
针对机载雷达运动目标检测中转发式干扰会引起虚警、抬高检测门限并降低雷达系统的检测概率的问题,提出了一种基于最大似然估计的机载雷达运动目标检测算法.首先估计转发式干扰的空域导向矢量,然后采用最大似然方法估计出运动目标的幅度,并以此来进行检测.仿真实验表明,该算法在完成杂波抑制的同时,可有效抑制旁瓣转发式干扰对运动目标检测的影响,并能在一定程度上降低主瓣转发式干扰对运动目标检测的影响.
Repeater jamming brings a great challenge to moving target detection for airborne radar.It not only causes a false alarm but also raises the threshold of the detector,which reduces the probability of detection.A method based on maximum likelihood estimation to detect a moving target for airborne radar under repeater jamming environment is proposed.Firstly,the spatial steering vector of repeater jamming is estimated.Afterward,the maximum likelihood method is utilized to estimate the amplitude of the target, whose estimated amplitude is used to detect the moving target.Simulations show that this method is capable not only of suppressing the clutter but also of reducing the effect of repeater jamming from the sidelobe on moving target detection.Moreover,it can reduce the effect of repeater jamming from the mainlobe to a certain degree.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2014年第6期51-56,154,共7页
Journal of Xidian University
基金
国家自然科学基金资助项目(61372133
61471285
61401500)
关键词
机载雷达
运动目标检测
最大似然估计
转发式干扰
airborne radar
moving target detection
maximum likelihood estimation
repeater jamming
