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Cooperative Strategies and Achievable Rates for Two User OFDMA Channels

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2 Author(s)
Bakim, S. ; Dept. of Electr. & Electron. Eng., Isik Univ., Istanbul, Turkey ; Kaya, O.

We propose three encoding strategies for a two user cooperative Orthogonal Frequency Division Multiple Access (OFDMA) system, based on block Markov superposition encoding (BMSE). We obtain the expressions for the resulting achievable rate regions for all three encoding strategies. We show that, by allowing for re-partitioning and re-encoding of the cooperative messages across subchannels, it is possible to better exploit the diversity created by OFDMA, and higher rates can be achieved. We demonstrate potential rate gains attained by cooperative OFDMA, through simulations.

Published in:

Wireless Communications, IEEE Transactions on  (Volume:10 ,  Issue: 12 )

Date of Publication:

December 2011

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