Dynamic Resource Allocation for Downlink Multiuser MIMO-OFDMA/SDMA Systems

Zhong  Chong-Xian; Yang  Lu-Xi

doi:10.3724/SP.J.1146.2007.01848

Volume 30 Issue 12

Jan. 2011

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Article Navigation > Journal of Electronics & Information Technology > 2008 > 30(12): 2972-2975

Zhong Chong-Xian, Yang Lu-Xi. Dynamic Resource Allocation for Downlink Multiuser MIMO-OFDMA/SDMA Systems[J]. Journal of Electronics & Information Technology, 2008, 30(12): 2972-2975. doi: 10.3724/SP.J.1146.2007.01848

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Zhong Chong-Xian, Yang Lu-Xi. Dynamic Resource Allocation for Downlink Multiuser MIMO-OFDMA/SDMA Systems[J]. Journal of Electronics & Information Technology, 2008, 30(12): 2972-2975. doi: 10.3724/SP.J.1146.2007.01848

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Dynamic Resource Allocation for Downlink Multiuser MIMO-OFDMA/SDMA Systems

doi: 10.3724/SP.J.1146.2007.01848

Received Date: 2007-11-29
Rev Recd Date: 2008-04-22
Publish Date: 2008-12-19

Abstract

Abstract

Dynamic resource allocation algorithms are investigated for downlink multiuser Multiple Input Multiple Output Orthogonal Frequency Division Multiple Access and Space Division Multiple Access (MIMO-OFDMA/SDMA) systems. Firstly, a mathematical formulation is provided with the goal of maximizing throughput under various constraints. Secondly, since the optimal solution is difficult to obtain, the optimization procedure is divided into two steps. In the first step, a metric is derived to measure the spatial compatibility of users with multiple antennas, and then a scheduling algorithm is developed based on the proposed metric. In the second step, two suboptimal algorithms are developed to assign resources for the scheduled users. Simulation results demonstrate that proposed algorithms outperform random scheduling scheme. When combined with power reuse strategy, proposed algorithms obtain performances close to the optimal scheme based on user selection.
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References

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