| 空分和频分混合接入方式下的无线资源调度算法 |
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| 引用本文： | 李蕾,牛志升.空分和频分混合接入方式下的无线资源调度算法[J].清华大学学报(自然科学版)网络.预览,2007(4). |
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| 作者姓名： | 李蕾 牛志升 |
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| 作者单位： | 清华大学电子工程系 北京100084 |
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| 摘 要： | 为进一步引入分集增益以提高无线资源频谱利用率,针对多用户多输入多输出正交频分复用(MIMO-OFDM)系统下行传输,提出联合OFDM和多用户空间复用MIMO混合接入方式下的用户调度和功率分配算法。采用这种混合接入方式不仅能够通过频率信道和空间信道的调度产生多用户分集增益,也能有效避免空分复用(SDMA)中频率复用产生的共信道干扰问题。在资源分配上,基于广义处理机共享(GPS)优化模型提出基于信道状态的并行加权公平队列(Cap-WFQ)调度和功率分配算法,算法在保证多媒体用户的最小数据率要求的同时优化系统吞吐量。
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| 关 键 词： | 正交频分复用(OFDM) 无线资源管理 调度 多输入多输出(MIMO) |
Radio resource allocation algorithm for combined frequency and spatial multiple access schemes |
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| Authors: | LI Lei NIU Zhisheng |
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| Abstract: | A scheduling and power allocation algorithm was developed in a combined orthogonal frequency division multiplexing (OFDM) access and spatial multiplexing multiuser multiple input multiple output (MIMO) access environment to introduce diversity gains to fully utilize radio resources. This combined access scheme provides multiuser access with diversity in both frequency channel scheduling and spatial channel scheduling, with elimination of the co-channel interference introduced by spatial division multiple access (SDMA). A generalized processor sharing type optimization is used to implement a channel-aware parallel WFQ for the scheme. The algorithm can optimize total throughput while guaranteeing the minimum data rate requirement for multimedia users. |
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| Keywords: | orthogonal frequency division multiplexing (OFDM) radio resource management scheduling multiple input multiple output (MIMO) |
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