A TOA-Based Geolocation Algorithm Utilizing Convex Combination

In the wireless position techniques for cellular networks, the traditional geolocation algorithms have been researched because of the advantage low complexity, however the representative LLOP algorithm does not well performed in the cellular networks since it is constrained with the geometry relationship between mobile station and the base stations. For the low accuracy problem of LLOP algorithm, we have proposed a TOA-based geolocation algorithm utilizing convex combination. The method introduces convex combination theory, which the convex combination of a set of coarse position estimations can be used to generate position estimation with higher accuracy, and proposes a linearized procedure to calculate the convex combination coefficients. Simulation results verify that the proposed algorithm decreases the position error by 6.19%, 7.51% and 40.97% compared with LLS- MLE algorithm, LLOP-LS algorithm and LLOP algorithm respectively when the number of base stations is 5 and the measurement noise standard deviation is 50m.