Location Tracking of Multiple Targets: an H∞ Approach

In this paper, an H
^∞
approach is developed for location tracking of multiple moving targets using a MIMO radar that employs $\bar N$ transmit-antennas and N receive-antennas. First, an array "manifold extender" is employed which incorporates all the location parameters of a target, that include the delay & Direction-of-Arrival (DOA), into a single extended manifold vector. Next, an algorithm based on H
^∞
adaptive filtering is proposed to track a state variable termed propagator, which can be used to construct a noise subspace equivalent. Finally, using the constantly estimated propagator, a two-step process that consists of estimating targets’ delays and updating their associated DOAs is proposed to extract the time-varying locations of all the targets. The performance of the proposed H
^∞
tracking approach is evaluated using computer simulation studies.