Ping Wang

TL;DR: This paper investigates the clock synchronization schemes of active node and overhearing node with immediate clock readjustment and proposes the maximum-likelihood estimators of the clock skew and the corresponding Cramer–Rao lower bounds, derived assuming Gaussian delays.

TL;DR: This paper investigates the synchronization scheme of having inactive nodes overhearing the pairwise sender-receiver time synchronization based on acknowledgement with clock correction at every synchronization, and derives the maximum likelihood estimators of clock skew and the corresponding approximate Cramer-Rao lower bounds for active and overhearing nodes.

TL;DR: This letter analyzes the synchronization of inactive nodes overhearing the pairwise synchronization on the basis of ACK mechanism, and presents a linear estimation algorithm of clock frequency offset with the nodes' clock adjusted at every synchronization.

TL;DR: 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.

TL;DR: This letter investigates the time synchronization scheme of listening nodes overhearing the neighboring two-way timing packet exchange based on periodical ACK mechanism and presents an efficient clock skew estimation algorithm with clock correction upon every synchronization.