Analysis of synchronization in mobile sensor networks using time-varying poles
Abstract
Time Synchronization is an important feature in mobile sensor networks since it leads
to more efficient data fusion, more efficient power saving schemes and more efficient access of
the communication medium. The objective of time synchronization in a network is to provide a
common time scale for the local clocks of all the nodes in the network. In this thesis, the problem
of time synchronization in mobile sensor networks is modeled as an interconnection of Linear
Time-Varying (LTV) systems operating over a graph. It is well known that in the case of Linear
Time-Invariant Systems operating over a graph, the eigenvalues of the graph Laplacian provide
useful information regarding the convergence of the network. This paper explores the use of
time-varying analogs, i.e. LTV poles obtained using a factorization approach, in analyzing LTV
systems interacting over a graph. The influence of simultaneous power transmit control and
synchronization is also studied, and it is observed that in some regions of the parameter space,
power transmit control can speed up synchronization, while in other regions of the parameter
space, it can slow down synchronization.
Description
Thesis (M.S.)--Wichita State University, College of Engineering, Dept. of Electrical Engineering and Computer Science