Track initialization in a multistatic DAB/DVB-T network

Digital audio/video broadcasting (DAB/DVB-T) is already available in a large area of Europe. The advantage of using these signals for passive air surveillance is the disposability of a large range of illuminators sending an easily decodeable digital broadcast signal. In the considered multi-static scenario, one observer provides bistatic Time Difference of Arrival (TDoA) and Doppler measurements. The main task for target tracking is to handle ghosts that arise due to problems of association between illuminators, targets and measurements. In this paper, an approach for track initialization in a single frequency network (SFN) is discussed, which is based on clustering. Special attention will be paid to the 2D estimation performance, related to fusing TDoA measurements of two distinct illuminators. Numerical results will include performance analysis via Monte-Carlo simulations for 2D Cartesian estimation performance and an analysis of the number of reasonable estimates in a real configuration of DAB illuminators.