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http://dx.doi.org/10.5909/JBE.2010.15.6.783

Subcarrier Allocation for Multiuser in Two-Way OFDMA Relay Networks using Decode-and-Forward Relaying  

Shin, Han-Mok (Department of Electrical Engineering and INMC, Seoul National Univ.)
Lee, Jae-Hong (Department of Electrical Engineering and INMC, Seoul National Univ.)
Publication Information
Journal of Broadcast Engineering / v.15, no.6, 2010 , pp. 783-790 More about this Journal
Abstract
A two-way relay network provide improved spectral efficiency compared with a conventional one-way relay network by using either superposition coding or network coding. OFDMA network provides imptoved performance by adaptive resource allocation. In this paper, we propose a adaptive subcarrier allocation for a multiuser two-way OFDMA relay network. In the proposed algorithm, subcarriers are allocated to the user-pairs and relays to maximize the achievable sum-rate over all user-pairs while satisfying the minimum rate requirement for each user-pair. Simulation results show that the proposed algorithm provides improved performance compared with the static and greedy algorithms.
Keywords
subcarrier allocation; two-way relaying; OFDMA; decode-and-forward;
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