Adaptive resource allocation for multi-destination relay systems based on OFDM modulation

Authors:
Nan Zhou;Xu Zhu;Yi Huang;Hai Lin
Affiliations:
Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, United Kingdom;Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, United Kingdom;Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, United Kingdom;Department of Electrical and Information Systems, Osaka Prefecture University, Osaka, Japan
Venue:
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Year:
2009

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Abstract

We propose the optimal resource allocation for wireless multi-destination relay systems with orthogonal frequency division multiplexing (OFDM) modulation, which includes sub-channel allocation (SA), subchannel pairing (SP), and joint source-relay power allocation (PA). Our work is different in that we consider a practical downlink OFDM based coperative network, where the relay is used to help the source (base station) to communicate with multiple destinations (users) rather than a single destination as assumed in the previous work. Simulation results demonstrate that the proposed optimal resource allocation outperforms other resource allocation schemes in terms of the system capacity. This work can be extended to multi-relay multidestination uplink/downlink OFDM relay systems.