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Resource allocation for downlink two-user OFDMA systems with wireless network coding

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2 Author(s)
Tarasak, P. ; Inst. for Infocomm Res., Agency for Sci. Technol. & Res. (A*STAR), Singapore, Singapore ; Sumei Sun

We first address a sum-rate maximization problem under a sum-power constraint. By introducing the concept of virtual user, we solve the problem by using the Lagrange dual method. We then look into a sum-power minimization problem under sum-rate constraints. The Lagrange dual method and an exhaustive search method are proposed, which achieve similar performance, but the former has a lower complexity. Our simulation shows about 3-dB power saving of our scheme over an OFDMA system without network coding.

Published in:

Signal Processing Advances in Wireless Communications (SPAWC), 2011 IEEE 12th International Workshop on

Date of Conference:

26-29 June 2011