采用粒子滤波的先跟踪后检测算法

先跟踪后检测(TBD)算法能够有效解决低信噪比条件下弱小目标的检测与跟踪问题.与传统的先检测后跟踪方法相比,它的优点在于可完整传感器数据,随时间累积起来能获得更好的检测与跟踪性能,特别是检测与跟踪弱小目标.同时与传统的跟踪算法相比,先跟踪后检测算法提供给跟踪器的信息更多,适合于跟踪低信噪比的弱小目标.探讨了先跟踪后检测问题的两个方面:滤波和检测.为了检测目标的出现与消失,在状态向量中增加一个二元变量对应目标存在.对于非线性、非高斯的跟踪问题,使用粒子滤波器跟踪弱小目标,基于粒子滤波器的权值实现最优检测器.给出粒子滤波器的TBD算法的理论推导以及数值计算过程.仿真实验表明:基于粒子滤波器的TBD算法能够检测与跟踪低信噪比的目标.

Track-before-detect algorithm via particle filtering

Track-before-detect(TBD)algorithm effectively deals with the problem of detection and tracking of small targets with low SNR.The advantage over classical tracking is that the full information is integrated with time,this leads to a better detection and tracking performance,especially for dim small targets.In this paper,the filtering and detection aspect of TBD algorithm were discussed.To detect the presence and absence of targets,the state vector was augmented with a binary variable corresponding to the tar...