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Bayesian Joint Synchronization and Localization Based on Asymmetric Time-stamp Exchange

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Document pages: 7 pages

Abstract: In this work, we study the joint synchronization and localization (sync&loc)of Mobile Nodes (MNs) in ultra dense networks. In particular, we deploy anasymmetric timestamp exchange mechanism between MNs and Access Nodes (ANs),that, traditionally, provides us with information about the MNs clock offsetand skew. However, information about the distance between an AN and a MN isalso intrinsic to the propagation delay experienced by exchanged time-stamps.In addition, we utilize Angle of Arrival (AoA) estimation to determine theincoming direction of time-stamp exchange packets, which gives furtherinformation about the MNs location. Finally, we employ Bayesian RecursiveFiltering (BRF) to combine the aforementioned pieces of information and jointlyestimate the position and clock parameters of MNs. The simulation resultsindicate that the Root Mean Square Errors (RMSEs) of position and clock offsetestimation are kept below 1 meter and 1 ns, respectively.

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