高频地波雷达航迹一体化探测中的虚假目标剔除方法

摘要

The dynamic programming algorithm can be used in the integration of detection-and-tracking for high frequency surface wave radar (HFSWR).However,the false targets,which are caused by noise or clutter,are difficult to be excludedwhen an inappropriate threshold value was chosen forthe dynamic programming algorithm.In this paper,the parametersaccuracyof HFSWR is alsoconsidered,and a false tracks exclusion methodis proposed based on the continuous characteristics of moving targets.The motion displacements of a real target calculated with the range information should be close to that estimated with theDoppler frequency shift in the(Range-Doppler,RD)spectrum,and the false targetsshould be excluded when the conditions is not satisfied.The comparison of the measured HF radar and synchronousAIS data show that the false targetscaused by the noise wereeliminated effectively,and the performance of real target tracking wasimprovedsignificantly.%在高频地波雷达目标探测中,利用动态规划法可以实现目标点迹和航迹的一体化探测.但由于噪声的存在以及一体化算法中阈值设置的不合理,会导致探测结果中存在虚假的目标航迹.本文分析了地波雷达目标参数的测量精度,结合目标运动特性,提出了一种虚假目标航迹剔除方法.对于真实目标,在距离-多普勒(Range-Doppler,RD)谱上由距离维和多普勒频移估计的目标位移应接近,不满足限定条件则被判别为虚假目标.实测地波雷达数据的探测结果与同步船只自动识别系统(Automatic Identification System,AIS)数据的对比实验表明,本文提出的方法能有效排除噪声引起的虚假航迹,提高地波雷达系统目标探测的整体性能.