Abstract
Probability hypothesis density(PHD) filter has attracted much attention in multi-target tracking, trafc control, image processing, multi-sensor management and other fields. An overview of the emergence, the development and the present research situation of the PHD filter in target tracking is presented here. Special attention is paid to the following areas: PHD filter, its implementation method, the peak and track extraction technology, multi-sensor multitarget tracking, multi-sensor management, PHD smoother, the assessment metrics of multi-target tracking performance,and also the relevant applications. Finally, based on the progress of existing PHD filters, some key issues which need to be focused on for PHD filters in multi-target tracking are introduced.
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