Title :
DMT Analysis of Asynchronous OFDM Decode-and-Forward Cooperative Networks
Author :
Torbatian, Mehdi ; Damen, Mohamed Oussama
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Waterloo, Waterloo, ON, Canada
Abstract :
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.
Keywords :
frequency division multiplexing; protocols; synchronisation; DMT analysis; OFDM; asynchronous cooperative network; decode-and-forward cooperative networks; decode-and-forward relaying protocol; diversity multiplexing gain tradeoff; nonorthogonal selection DF protocol; orthogonal frequency division multiplexing; synchronization error; Computer errors; Decoding; Diversity methods; Frame relay; Frequency synchronization; Local oscillators; OFDM modulation; Propagation delay; Protocols; Timing;
Conference_Titel :
Global Telecommunications Conference, 2009. GLOBECOM 2009. IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-4148-8
DOI :
10.1109/GLOCOM.2009.5426100
