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Variational Inference-based Positioning with Nondeterministic Measurement Accuracies and Reference Location Errors

Zhou, B, Chen, Q, Wymeersch, H, Xiao, P and Zhao, L (2016) Variational Inference-based Positioning with Nondeterministic Measurement Accuracies and Reference Location Errors IEEE Transactions on Mobile Computing.

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Abstract

Cooperative network localization plays an important role in wireless sensor network (WSN), wherein neighboring sensor nodes will help each other to calibrate their locations. However, due to the dynamic wireless propagation environment and different surroundings, the measurement accuracy at different network nodes is different and varies over time. In this paper, the uncertainties in both measurement accuracy and reference node locations are considered to account for the impact of different surrounding environments and the initial node location errors on the cooperative network localization. A mean-field variational inference-based positioning (VIP) algorithm is proposed for cooperative network localization. The mechanism of the proposed VIP algorithm, the convergence properties, implementation complexity, and the parallel implementation structure are presented to show that the VIP algorithm provides an effective mechanism to incorporate and share the localization information among all network nodes for an improved localization performance. Finally, a concise Cramer-Rao lower bound (CRLB) is derived to reveal the principle of localization error propagation. It is disclosed that the localization error propagation principle is similar to the Ohm’s Law in circuit theory, which provides a new insight into the impact of the measurement accuracy, the reference node location errors and the number of reference nodes on the cooperative network localization performance.

Item Type: Article
Subjects : Electronic Engineering
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
NameEmailORCID
Zhou, BUNSPECIFIEDUNSPECIFIED
Chen, QUNSPECIFIEDUNSPECIFIED
Wymeersch, HUNSPECIFIEDUNSPECIFIED
Xiao, PUNSPECIFIEDUNSPECIFIED
Zhao, LUNSPECIFIEDUNSPECIFIED
Date : 15 December 2016
Identification Number : 10.1109/TMC.2016.2640294
Copyright Disclaimer : © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Depositing User : Symplectic Elements
Date Deposited : 16 Dec 2016 14:52
Last Modified : 31 Oct 2017 19:01
URI: http://epubs.surrey.ac.uk/id/eprint/813125

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