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DMT Analysis of Asynchronous OFDM Decode-and-Forward Cooperative Networks

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2 Author(s)
Torbatian, M. ; Dept. of Electr. & Comput. Eng., Univ. of Waterloo, Waterloo, ON, Canada ; Damen, M.O.

The outage behavior of decode-and-forward (DF) relaying protocol over an asynchronous cooperative network is examined when orthogonal frequency division multiplexing (OFDM) is used to combat synchronization error among the transmitting nodes. We consider non-orthogonal selection DF (NSDF) and orthogonal selection DF (OSDF) protocols, respectively, over a single relay and a two relay cooperative network and analyze the diversity multiplexing gain tradeoff (DMT) in both scenarios. It is proved that asynchronous protocols provide diversity gains greater than or equal to the one of synchronous counterparts in the limit of code word length and throughout the range of multiplexing gain.

Published in:

Global Telecommunications Conference, 2009. GLOBECOM 2009. IEEE

Date of Conference:

Nov. 30 2009-Dec. 4 2009