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Joint motion estimation and clock synchronization for a wireless network of mobile nodes

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2 Author(s)
Rajan, R.T. ; ASTRON, Dwingeloo, Netherlands ; van der Veen, A.-J.

Localization and synchronization are critical challenges for a wireless network, which are conventionally solved independently. Recently, various estimators have been proposed to jointly synchronize and localize a node in a static network based on two way communication. In this paper, we present a novel and generic model based on two way communication between nodes, which are in relative motion with respect to each other. Furthermore, for the entire network we propose a closed form Extended Global Least Squares (EGLS) solution to solve for all the unknown clock skews, clock offsets, initial pairwise distances and relative radial velocities using a single clock reference within the network. A new Cramer Rao Bound (CRB) is derived and the proposed fusion center based Extended Global Least Squares (EGLS) solution is shown to be asymptotically optimal.

Published in:

Acoustics, Speech and Signal Processing (ICASSP), 2012 IEEE International Conference on

Date of Conference:

25-30 March 2012