TOA complementing method for target localization by UWB radar systems

Detection, localization and tracking of moving persons by using UWB radars still attract the attention of researchers and final users as well. The problem of UWB sensors usage for this application consists in the fact, that a single sensor is not very often able to localize a target through complex environment with the required reliability and accuracy. Therefore, UWB sensor network has been proposed for such applications. In this paper, we are dealing with the through-the-wall localization of a moving person by using the small sensor network consisting of two UWB radar systems. For that scenario, we have introduced a new method of the cooperative localization denoted as the time of arrival completing method (TOACOM). The performance properties of this method have been analyzed and compared in a real single target through-the-wall scenario with the direct calculation method based on a single radar application and with the method of joining intersections of the ellipses. The obtained results indicate the superior performance of TOACOM in comparison with the mentioned alternative approaches.