Title :
Theoretical estimators and lower-bounds for receiver-to-receiver time synchronization in multi-hop wireless networks
Author :
Djenouri, Djamel
Author_Institution :
CERIST Res. Center, Algiers, Algeria
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 10-6 for the skew, and 10-5 for the offset.
Keywords :
maximum likelihood estimation; mean square error methods; radio networks; CRLB; Cramer-Rao lower bounds; MLE; MSE; maximum likelihood estimators; mean square error; multihop wireless networks; receiver-to-receiver protocols; single-hop model; time synchronization parameters;
Conference_Titel :
Wireless Communications and Applications (ICWCA 2012), IET International Conference on
Conference_Location :
Kuala Lumpur
Electronic_ISBN :
978-1-84919-550-8
DOI :
10.1049/cp.2012.2084