Study on multitarget tracking algorithm in passive cross location systems

When the coordinates of the target are obtained by direction-finding location through multiple passive sensors, the associated bearing measurements must be the same time detection of these sensors. But these sensors may have different sampling intervals, and the time of these sensors beginning to receive the target signal may be also different. In this case, the first problem one must solve in direction-finding location is measurement synchronization. The paper studies this problem and proposes a method to solve it. An improved least distance method is used in this paper to eliminate the false intersection points. The methods of track initiation and maintenance in multitarget tracking are also discussed in this paper. The simulation results show that passive sensors can track multiple targets at the same time using the methods discussed in this paper.