Estimation of Frequency Offset for Time Synchronization With Immediate Clock Adjustment in Multihop Wireless Sensor Networks
| Autor: | Ping Wang, Min Li, Lun Shao, Heng Wang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0209 industrial biotechnology
Computer Networks and Communications Computer science Real-time computing 020206 networking & telecommunications 02 engineering and technology Clock skew Clock synchronization Synchronization Computer Science Applications Spread spectrum Key distribution in wireless sensor networks 020901 industrial engineering & automation Hardware and Architecture Signal Processing Computer Science::Networking and Internet Architecture 0202 electrical engineering electronic engineering information engineering Data synchronization Self-clocking signal Wireless sensor network Information Systems |
| Zdroj: | IEEE Internet of Things Journal. 4:2239-2246 |
| ISSN: | 2327-4662 |
| DOI: | 10.1109/jiot.2017.2756824 |
| Popis: | The clock synchronization problem for wireless sensor networks (WSNs) is inherently related to parameter estimation. Nowadays, extensive studies on time synchronization have been conducted by adopting statistical signal processing methods. However, most estimation schemes do not readjust clock offset during the process of synchronization parameter estimation, and it would lead to unsatisfactory clock accuracy during synchronization. Thus, the applications of these methods are greatly limited in WSNs. This paper analyzes time synchronization of sensor nodes with immediate clock adjustment at every cycle under multihop scenario, and presents an estimator of clock skew under the Gaussian linear delay model and the corresponding algorithms for finding the estimator in detail. Simulation results verify that the proposed estimator is efficient. |
| Databáze: | OpenAIRE |
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