脉冲多普勒雷达目标航迹自动起始方法研究
2018-07-28林晓斌张承志谢梦
林晓斌 张承志 谢梦
【摘 要】在复杂杂波背景下,雷达探测画面中往往存在大量虚假点迹,通过人工方式无法及时、有效地发现真实目标,因此现代雷达系统对目标航迹自动起始功能均有较高要求。脉冲多普勒雷达由于能够实现目标测速,成为复杂杂波环境下目标探测的有效手段。本文研究了脉冲多普勒雷达目标航迹自动起始方法,基于“点迹对”运动特性与点迹多普勒速度的比对适配,剔除虚假暂时航迹,实现真实目标航迹准确、快速起始。
【关键词】杂波背景;多普勒雷达;多普勒速度;航迹起始
中图分类号: TN958.2 文献标识码: A 文章编号: 2095-2457(2018)12-0015-002
DOI:10.19694/j.cnki.issn2095-2457.2018.12.005
Research on Target Track Automatic Initiation Method in Pulse Doppler Radar
LIN Xiao-bin1,2 ZHANG Cheng-zhi1,2 XIE Meng1,2
(1.No. 38 Research Institute of CETC, Hefei 230088, China;
2.Key laboratory of Aperture Array and Space Application, Hefei 230088, China)
【Abstract】In the complex clutter background, there are often a lot of false plots in the radar detection screen and the real target cannot be found in time and effectively by manual method. Therefore, the modern radar system has a high requirement for the target track automatic initiation. Pulse Doppler radar is an effective method for target detection in complex clutter environment, because of its ability to achieve target velocity measurement. This paper studies the target track automatic initiation method in pulse Doppler radar. Based on the matching of "plot pair" motion characteristics and the Doppler velocity of the plots, we eliminate the false temporary track and make the real target track to be initialized accurately and quickly.
【Key words】Clutter Background; Pulse Doppler Radar; Doppler Velocity; Track Initiation
0 引言
復杂背景环境下的雷达目标检测过程常常受到杂波信号的影响。杂波类型包括地物杂波、海杂波、气象杂波以及干扰箔条引起的杂波等,杂波信号强度甚至超过目标信号,从而给目标检测带来困难[1]。杂波背景下,雷达画面中往往存在数以万计的点迹,即使是熟练的雷达操作员仍无法胜任通过人工方式有效发现真实目标的工作,因此要求现代雷达系统具有目标航迹全自动起始功能,能够自动发现目标。文献[2]提出了基于一步延迟思想和多假设思想的航迹起始算法,以解决传统的基于逻辑的航迹起始方法在杂波密度大和目标数目多时,不利于实时计算的问题。文献[3]提出了基于启发式逻辑的概率假设密度滤波高效航迹起始方法,通过多约束条件缩减虚假新生目标,以提高计算效率和目标数目的估计精度。……
