Reliable clock estimation using linear weighted fusion based on pairwise broadcast synchronization

Journal Article · Mon Oct 06 04:00:00 EDT 2014 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4897771· OSTI ID:22307936

Shi, Xin; Zhao, Xiangmo; Hui, Fei; Ma, Junyan; Yang, Lan ^[1]

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1. School of Information Engineering, Chang'an University, Xi'an City (China)

Clock synchronization in wireless sensor networks (WSNs) has been studied extensively in recent years and many protocols are put forward based on the point of statistical signal processing, which is an effective way to optimize accuracy. However, the accuracy derived from the statistical data can be improved mainly by sufficient packets exchange, which will consume the limited power resources greatly. In this paper, a reliable clock estimation using linear weighted fusion based on pairwise broadcast synchronization is proposed to optimize sync accuracy without expending additional sync packets. As a contribution, a linear weighted fusion scheme for multiple clock deviations is constructed with the collaborative sensing of clock timestamp. And the fusion weight is defined by the covariance of sync errors for different clock deviations. Extensive simulation results show that the proposed approach can achieve better performance in terms of sync overhead and sync accuracy.

• OSTI ID: 22307936
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1618; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCURACY
COMPUTERIZED SIMULATION
DATA PROCESSING
ERRORS
PERFORMANCE
SENSORS
SYNCHRONIZATION