基于PS-VF-TBD的地波雷达船只目标航迹起始方法

Ship track initiation method of a high-frequency surface wave radar based on PS-VF-TBD

针对地波雷达低信噪比目标信号“闪烁”导致的航迹起始困难问题,本文提出了一种基于PS-VF-TBD的航迹起始方法。该方法综合利用了地波雷达回波谱中目标信号的展宽特征和运动特性,利用PS-VF-TBD方法对运动目标能量有效积累的特点,提高对疑似目标多帧信号间的关联概率,进而提高对真实目标的搜索概率和航迹起始成功率。通过地波雷达实测数据的航迹起始结果及长时间跟踪结果与同步AIS信息的对比分析,表明本文提出的方法相对于基于DP-TBD的航迹起始方法可以给出更好的航迹起始结果,提高了远端低信噪比下“闪烁”目标的航迹起始概率,可提高目标跟踪性能,并具有区分距离-多普勒谱中邻近目标的能力。

The high-frequency surface wave radar has a low signal-to-noise ratio,making the target signal“flicker”and tracking initiation difficult.To address this problem,this paper proposes a track initiation method based on PS-VF-TBD.This method makes comprehensive use of the broadening and motion characteristics of the target sig-nal in the echo spectrum,as well as the PS-VF-TBD method that can effectively accumulate the energy of the moving target,to improve the correlation probability between multi-frame signals of suspected targets,thereby im-proving the search probability of the real target and the success rate of track initiation.The track initiation and long-time tracking performance based on the measured data and synchronous AIS information of the ground wave radar were compared and analyzed;the result reveals that the proposed method could give better track initiation results than the method based on DP-TBD,improve the track initiation probability of“flickering”targets with low signal-to-noise ratio at the far,and improve the target tracking performance.Moreover,it can distinguish adjacent targets in the range-Doppler spectrum.