Theoretical Estimators and Lower-Bounds for Receiver-to-Receiver Time Synchronization in Multi-Hop Wireless Networks
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Date
2012-10
Authors
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Journal ISSN
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Publisher
IEEE/IET
Abstract
Maximum likelihood estimators (MLE) for time synchronization parameters of receiver-to-receiver protocols are derived. The MLE are first provided for a single-hop model,
then generalized to a multi-hop model. The appropriate Cramer-
Rao lower bounds (CRLB) for the estimators are then derived,
which serves as a theoretical lower bound to any unbiased
estimator. The proposed estimators are compared with their
respective CRLB through simulation in multi-hop scenarios of
up-to eight hops. The results show fast convergence of the
estimation precision to the CRLB and demonstrate a high
precision, where the mean square error (MSE) does not exceed
10
Description
Keywords
Time synchronization, Estimators, Maximum likelihood.