Çelik, YasinOdabaşıoğlu, NiyaziUysal, Murat13.07.20192019-07-1613.07.20192019-07-1620139781467355629https://dx.doi.org/10.1109/SIU.2013.6531189https://hdl.handle.net/20.500.12451/26682013 21st Signal Processing and Communications Applications Conference, SIU 2013 -- 24 April 2013 through 26 April 2013 -- Haspolat -- 98109In this paper, we investigate joint channel gain and time offset estimation for two different data aided methods in cooperative communication with amplify-And-forward (AF) relaying. First one is the Cascaded Estimation (CE) method which channel gain, and time offset consisting of both source-to-relay, and relay-to-destination links are estimated at the destination terminal, second one is Disintegrated Estimation (DE) method which channel gain, and time offset are estimated seperately at the relay for source-to-relay link, and at the destination for relayto- destination link. Both of the proposed joint estimators are based on Expectation-Maximization (EM) algorithm and, produce a low-complexity solution of itaretive maximum likelihood (ML) estimation. It was observed by the bit error rate (BER) curves, the proposed methods provide good performances with lowcomplexity. © 2013 IEEE.trinfo:eu-repo/semantics/openAccessConference Object10.1109/SIU.2013.6531189N/AN/A