Direction-of-Arrival Tracking of Multiple Fast-Moving Sources in Antenna Array based Access Networks

This paper is concerned with the problem of simultaneously tracking the direction-of-arrival (DOA) of multiple fast moving sources using the vector-signal received by a small aperture antenna array of N elements. The antenna array may be located at the Node-B, eNode-B or gNode-B of an access network and is used in conjunction with a novel trajectory tracking algorithm. The proposed algorithm incorporates a “manifold extender” together with a state space model and an arrayed extended Kalman filter (EKF). These provide a spatiotemporal tracking approach of the DOAs and angular velocities of multiple fast moving sources snapshot-by-snapshot. Furthermore, two different manifold extenders are employed in the proposed algorithm and their performance is evaluated using computer simulation studies and is compared with the case where the proposed algorithm is implemented without a “manifold extender”.