Liu Min, Xu Da-zhuan. Adaptive Bandwidth and Sub-carrier Allocation for OFDMA Downlinks[J]. Journal of Electronics & Information Technology, 2009, 31(4): 907-910. doi: 10.3724/SP.J.1146.2007.01786
Citation:
Liu Min, Xu Da-zhuan. Adaptive Bandwidth and Sub-carrier Allocation for OFDMA Downlinks[J]. Journal of Electronics & Information Technology, 2009, 31(4): 907-910. doi: 10.3724/SP.J.1146.2007.01786
Liu Min, Xu Da-zhuan. Adaptive Bandwidth and Sub-carrier Allocation for OFDMA Downlinks[J]. Journal of Electronics & Information Technology, 2009, 31(4): 907-910. doi: 10.3724/SP.J.1146.2007.01786
Citation:
Liu Min, Xu Da-zhuan. Adaptive Bandwidth and Sub-carrier Allocation for OFDMA Downlinks[J]. Journal of Electronics & Information Technology, 2009, 31(4): 907-910. doi: 10.3724/SP.J.1146.2007.01786
This paper addresses adaptive resource allocation for OFDMA downlinks. A sub-optimal two-step sub-carrier allocation scheme is proposed to minimize the outage probability for a total transmit power budget. A characteristic of bandwidth and sub-carrier allocation is analyzed, and a two-step sub-carrier allocation scheme is proposed, which distributes bandwidth and sub-carriers among users based on available resource, QoS requirements and channel state information. Simulation results demonstrate that the proposed algorithms can achieve low outage probability while meet the total power budget.
IEEE standard for local and metropolitan area networks[s],Part 16, Amendment 2 and Corrigendum 1. 2006.[2]Berezdivin R, Breinig R, and Topp R. Next-generationwireless communications: concepts and technologies[J]. IEEECommunication Magazine, 2002, 43(4): 108-116.[3]Zhang Y and Letaief K B. Multiuser adaptive subcarrierand-bit allocation with adaptive cell selection for OFDMsystems[J].IEEE Trans. on Wireless Communications.2004,3(5):1566-1575[4]Wang J, Wang Y, and Yang X, et al.. Adaptive subcarrier andbit allocation for multiuser OFDM networks[C]. 2006 AsiaPacific Conference on Communications, Busan, South Korea,31 Aug.-1 Sept. 2006: 5.[5]Kivanc D. Resource Allocation for MulticarrierCommunications[D]. [Ph.D. dissertation], Washington:University of Washington, 2005.[6]Hamouda S, Godlewski P, and Tabbane S. Improved reusepartitioning and power control for downlink multi-cellOFDMA system[C]. The 2006 workshop on Broadbandwireless access for ubiquitous networking, Alghero, Italy,2006: 1189-1193.[7]Kwon H, Lee W, and Lee B. Low-overhead resourceallocation with load balancing in multi-cell OFDMAsystems[C]. 2005 IEEE 61st Vehicular TechnologyConference - VTC 2005-Spring Stockholm: Paving the Pathfor a Wireless Future. Stockholm, Sweden, May 30-June 12005: 3063-3067.[8]Ermolova N and Makarevitch B. Low complexity adaptivepower and subcarrier allocation for OFDMA[J].IEEE Trans.on Wireless Communications.2007, 6(2):433-437