Joint localization and time synchronization in wireless sensor networks with anchor uncertainties

Authors:
Jun Zheng;Yik-Chung Wu
Affiliations:
Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong;Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong
Venue:
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Year:
2009

Citing 7
Cited 0

Analysis and properties of the generalized total least squares problem AX≈B when some or all columns in A are subject to error

SIAM Journal on Matrix Analysis and Applications
Fundamentals of statistical signal processing: estimation theory

Fundamentals of statistical signal processing: estimation theory
Timing-sync protocol for sensor networks

Proceedings of the 1st international conference on Embedded networked sensor systems
Secure Localization and Time Synchronization for Wireless Sensor and Ad Hoc Networks (Advances in Information Security)

Secure Localization and Time Synchronization for Wireless Sensor and Ad Hoc Networks (Advances in Information Security)
Wireless Sensor Networks: Signal Processing and Communications

Wireless Sensor Networks: Signal Processing and Communications
Wireless sensor network localization techniques

Computer Networks: The International Journal of Computer and Telecommunications Networking
Localization in Time and Space for Sensor Networks

AINA '07 Proceedings of the 21st International Conference on Advanced Networking and Applications

Quantified Score

Hi-index	0.00

Visualization

Abstract

Although localization and synchronization share many aspects in common, they are traditionally treated separately. In this paper, we present a unified framework to jointly solve these two problems at the same time. The joint approach is attractive because it can solve both localization and synchronization using the same set of message exchanges. This is extremely important for energy saving, especially for the energy constrained wireless sensor networks. Furthermore, since the accuracy of localization and synchronization is very sensitive to the accuracy of anchor locations and timings, the joint localization and synchronization problem with inaccurate anchor is considered in this paper. A novel generalized total least squares (GTLS) based method is proposed and the Cramer-Rao lower bound (CRLB) for the joint localization and time synchronization is derived. Simulation results show that the mean square error performances of the proposed estimator can attain the CRLB.