Abstract
The multi-target Bayes filter proposed by Mahler is a principled solution to recursive Bayesian tracking based on RFS or FISST. The $\delta$-GLMB filter is an exact closed form solution to the multi-target Bayes recursion which yields joint state and label or trajectory estimates in the presence of clutter, missed detections and association uncertainty. Due to presence of explicit data associations in the $\delta$-GLMB filter, the number of components in the posterior grows without bound in time. In this work we propose an efficient approximation to the $\delta$-GLMB filter which preserves both the PHD and cardinality distribution of the labeled posterior. This approximation also facilitates efficient multi-sensor tracking with detection-based measurements. Simulation results are presented to verify the proposed approach.
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