Title :
Comments on "Timing Estimation and Resynchronization for Amplify-and-Forward Communication Systems
Author :
Mehrpouyan, Hani ; Blostein, Steven D.
Author_Institution :
Dept. of Signals & Syst., Chalmers Univ. of Technol., Gothenburg, Sweden
Abstract :
This comment first shows that the Cramér-Rao lower bound (CRLB) derivations in the above paper are not exact. In addition, contrary to the claims in the above paper, the assumptions of perfect timing offset estimation and matched-filtering at the relays affect the generality of the analytical results and cannot be justified.
Keywords :
amplify and forward communication; matched filters; synchronisation; CRLB derivations; Cramer-Rao lower bound; amplify-and-forward communication systems; matched-filtering; timing offset estimation; timing resynchronization; Communication systems; Cramer-Rao bounds; Estimation; Relays; Synchronization; Amplify-and-forward; Cramér–Rao lower bound; cooperative communications; synchronization; timing offset estimation;
Journal_Title :
Signal Processing, IEEE Transactions on
DOI :
10.1109/TSP.2011.2143708
