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Volume 30 Issue 7
Jan.  2011
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Han Feng, Liu Ying-zhuang, Zhu Guang-xi, Lu Xiao-feng . An Adaptive Scheme with Guaranteed QoS for Multiuser MIMO/OFDM Downlink[J]. Journal of Electronics & Information Technology, 2008, 30(7): 1540-1543. doi: 10.3724/SP.J.1146.2006.01939
Citation: Han Feng, Liu Ying-zhuang, Zhu Guang-xi, Lu Xiao-feng . An Adaptive Scheme with Guaranteed QoS for Multiuser MIMO/OFDM Downlink[J]. Journal of Electronics & Information Technology, 2008, 30(7): 1540-1543. doi: 10.3724/SP.J.1146.2006.01939

An Adaptive Scheme with Guaranteed QoS for Multiuser MIMO/OFDM Downlink

doi: 10.3724/SP.J.1146.2006.01939
  • Received Date: 2006-12-07
  • Rev Recd Date: 2007-06-04
  • Publish Date: 2008-07-19
  • This paper investigates adaptive resource allocation scheme to maximize the sum-rate under the QoS constraint for multiuser MIMO/OFDM downlink. Specifically, the basestation exploits spatial division multiple access (SDMA) to support several users in each subcarrier, and linear precoding to reduce inferences among users. An adaptive power and bit allocation scheme with guaranteed QoS is provided. And two low-complexity suboptimal bit fill and bit removal algorithms which could be used in practical systems are proposed. Simulation results show that these two algorithms achieve nearly the same performance as the optimal one.
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  • Tse D N. Optimal power allocation over parallel Gaussianbroadcast channels. IEEE International Symposium onInformation Theory Proceedings, Ulm, Germany, 1997: 27.[2]Weingarten H, Steinberg Y, and Shamai S S. The capacityregion of the gaussian multiple-Input multiple-outputbroadcast channel[J].IEEE Trans. on Information Theory.2006,52(9):3936-3964[3]Spencer Q H, Swindlehurst A L, and Haardt M. Zero-forcingmethods for downlink spatial multiplexing in multiuserMIMO channels[J].IEEE Trans. on Signal Processing.2004,52(2):461-471[4]Yoo T and Goldsmith A. On the optimality of multiantennabroadcast scheduling using zero-forcing beamforming[J].IEEEJournal on Selected Areas in Communications.2006, 24(3):528-541[5]Wong C Y, Cheng R S, and Lataief K B, et al.. MultiuserOFDM with adaptive subcarrier, bit, and power allocation[J].IEEE Journal on Selected Areas in Communications.1999,17(10):1747-1758[6]Chemaly R, Letaief K B, and Zeghlache D. Adaptive resourceallocation for multiuser MIMO/OFDM networks based onpartial channel state information. IEEE GlobalTelecommunications Conference, Missouri, USA, 2005, vol.6:3922-3926.[7]卢小峰, 朱光喜, 伍仁勇. 基于多用户MIMO/OFDM 系统的空间子信道分配算法. 通信学报, 2006, 27(9): 34-39.[8]Pan C K, Cai Y, and Xu Y. Adaptive subcarrier and powerallocation for multiuser MIMO-OFDM systems. IEEEInternational Conference on Communications, Soul, Korea,2005: 2631-2635.[9]Chung S T and Goldsmith A J. Degrees of freedom inadaptive modulation: a unified view[J].IEEE Trans. onCommunications.2001, 49(9):1561-1571
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