A TSOA based localization algorithm in wireless networks

Wireless localization plays an important role in the internet of things, such as the wireless sensor network and the smart grid. Therefore this paper investigates the time-sum-of-arrival (TSOA) based localization algorithm, where a two-step weighted least-squares algorithm is analytically derived according to the elliptical geometry. Meanwhile, the comparison between the proposed algorithm and the conventional time-difference-of-arrival (TDOA) algorithm is provided in detail. The simulation shows that the TSOA based algorithm produces a better performance than the TDOA based one in the environment with large range measurements.