A comparative study on the use of road network information in GMTI tracking

A key requisite to GMTI tracking is the use of road network to enhance the track quality and the track continuity. In this paper, we present a comparative study on the incorporation of such information in the GMTI tracking. We consider for this the particular scenario of tracking a target at road junctions or intersections. The goal of this study is to examine the performances of three tracking algorithms IMM, PMHT and DDIMM (Delayed Decision IMM) in this scenario. In this paper, we describe the GMTI tracking problem and some issues related to the integration of contextual information that need to be addressed. Furthermore, we give a brief description to the IMM, PMHT and DDIMM in the ground tracking framework. We emphasize on the particular approach of including the contextual formation in the tracking algorithms : we consider that each road segment belonging to a junction or an intersection presents a different mode for the IMM and the DDIMM and a different hypothesis for the PMHT. The road segment selection test is done either sequentially or based on some batch processing. Before conclusion, some simulations results that evaluate the performances of the three filters are presented.