Joint TDOA-DOA localization scheme for passive coherent location systems

This work presents a new approach to airborne target localization in a passive radar system. Using a joint time-difference-of-arrival (TDOA) and direction-of-arrival (DOA) localization technique, each receiver is capable of estimating both TDOA and DOA information of a far distant signal source. This method uses the Ambiguity Function to detect time delay between direct and reflected signal and the multiple signals classification (MUSIC) algorithm to estimate the incident angle of the signal reflected by airborne target. This approach can successfully localize a target that is 70km away from the receiver. Computer simulations are provided to demonstrate the effectiveness of the proposed scheme.