期刊名称：International Journal of Distributed Sensor Networks
印刷版ISSN：1550-1329
电子版ISSN：1550-1477
出版年度：2013
卷号：2013
DOI：10.1155/2013/794805
出版社：Hindawi Publishing Corporation
摘要：This paper considers the problem of estimating the clock bias and the position of an unknown source
using time of arrival (TOA) measurements obtained at a sensor array to achieve time synchronization and
source localization. The study starts with deriving the localization mean square error (MSE) for the case
where we pretend that the source clock bias is absent and apply TOA positioning to find the source position.
An upper bound on the clock bias, over which we shall obtain a higher localization MSE than that from
jointly identifying the clock bias with the source position, is established. Motivated by the MSE analysis, this
paper proceeds to develop a new efficient solution for joint synchronization and source localization. The new
method is in closed-form, computationally attractive, and more importantly; it is shown analytically to attain
the CRLB accuracy under small Gaussian TOA measurement noise. Computer simulations are conducted to
corroborate the theoretical development and illustrate the good performance of the proposed algorithm.
