Cooperative angle-of-arrival position localization

Cooperation among unknown-location nodes can improve network positioning coverage as well as localization accuracy particularly in the poor electronic conditions. This paper investigates the cooperative angle-of-arrival (AOA) positioning based on the Ultra Wide-band (UWB) technique. An UWB measuring system is built to estimate the AOAs, and then the weighted cooperative positioning algorithm is implemented to determine the locations of the unknown nodes. Theoretical analysis is conducted to evaluate the accuracy of the cooperative AOA localization, and the methods to select neighbors for the distributed localization are proposed as well to improve the localization performance. The results of extensive experiments have shown that the proposed cooperative AOA positioning approach is more accurate. (C) 2014 Elsevier Ltd. All rights reserved.