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分布式OFDMA系统下行资源分配算法 被引量:5

Resource Allocation for Distributed OFDMA Downlink Systems
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摘要 针对正交频分复用(OFDM)分布式天线系统(DAS)的下行链路,在发送端采用最大比发送(MRT)并且单天线功率受限、所有发射天线的总功率受限,考虑用户最低速率要求时,文中提出一种最大化和速率容量的次优资源分配策略。仿真结果表明,动态天线选择策略下DAS比集中式天线系统(CAS)获得更大的和速率容量,并且更容易达到最低速率的要求。 A sub-optimal resource allocation strategy for orthogonal frequency division multiplexing (OFDM) distributed antenna system (DAS) is proposed in this paper. Taking maximum ratio transmission (MRT) into consideration, the algorithm aims to maximize the rate-sum capacity under the individual and total power constraints of the distributed antennas and the per-user minimum rate requirements. Simulation results show that, by using the proposed multi-antenna strategy, DAS obtains higher rate-sum capacities than co-located antenna system (CAS) and offers better fairness.
出处 《通信技术》 2009年第3期45-47,共3页 Communications Technology
基金 国家高技术研究发展计划("863"计划)基金资助项目(No.2007AA01Z207) 新世纪人才基金资助项目 东南大学移动通信重点实验室研究课题基金资助项目(2008A06)
关键词 正交频分复用 分布式天线系统 集中式天线系统 最大比发送 资源分配 orthogonal frequency division multiplexing (OFDM) distributed antenna system (DAS) co-located antenna system (CAS) maximum ratio transmission (MRT) resource allocation
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参考文献4

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同被引文献41

  • 1李征,王瑜,吴伟陵.DWCS与DACS系统反向性能比较[J].电子测量技术,2005,28(2):68-69. 被引量:1
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  • 3赵宇明,王赞基,郭静波,于歆杰.考虑功率谱限制的电力线通信比特分配算法[J].中国电机工程学报,2006,26(5):143-148. 被引量:33
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