Journal
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
Volume 62, Issue 10, Pages 5445-5450Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAC.2017.2697683
Keywords
Convergence; consensus; time synchronization; wireless sensor network
Funding
- National Natural Science Foundation of China [61573105, 61273110]
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Recently, it was pointed out that many popular consensus-based time synchronization algorithms, such as Average TimeSynch (ATS), are all divergent in a network with arbitrarily small random communication delays under any interconnection topology. This note proposes a least-squares estimation-based time synchronization (LSTS for short) algorithm. This algorithm modifies the ATS algorithm in relative drift estimator, low-pass filter, and consensus protocol. By analyzing the mathematic model of the algorithm, it is proved that LSTS ensures asymptotic convergence of the drift estimation and boundedness of the global time synchronization error under random bounded communication delays if the network topology satisfies some connectedness conditions.
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