Joint Time Synchronization and Localization for Target Sensors Using a Single Mobile Anchor with Position Uncertainties
Fangling Yao, Yiyin Wang, Xinping Guan
Abstract
Clock synchronization is required by most time-based localization methods in wireless sensor networks (WSNs). However, synchronization is often coupled with localization. Furthermore, the accuracy of anchor positions depends on several factors, and uncertainties may exist in the observed anchor positions. Thus, we propose a joint time and location estimation of target sensors using a single mobile anchor to reduce the deployment cost for WSNs. Taking anchor position uncertainties into account, we develop an expectation maximization (EM)-type method to solve the joint estimation problem. The simulation results verify the performance of the proposed EM method is superior than conventional methods, such as least squares (LS), weighted least squares (WLS) and generalized total least squares (GTLS) estimators.
BibTeX
@inproceedings{icassp2018_jointtimesynchro,
title = {Joint Time Synchronization and Localization for Target Sensors Using a Single Mobile Anchor with Position Uncertainties},
author = {Fangling Yao and Yiyin Wang and Xinping Guan},
booktitle = {ICASSP 2018},
year = {2018}
}