| OFDMA分布式天线系统下的比例公平资源分配算法 |
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| 引用本文： | 刘慎发,吴伟陵.OFDMA分布式天线系统下的比例公平资源分配算法[J].北京邮电大学学报,2007,30(4):125-128. |
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| 作者姓名： | 刘慎发 吴伟陵 |
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| 作者单位： | 北京邮电大学,信息工程学院,北京,100876;北京邮电大学,信息工程学院,北京,100876 |
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| 摘 要： | 提出了一种正交频分多址（OFDMA）分布式天线系统下的子载波和功率分配算法，该算法在满足用户比例速率要求、天线独立功率限制要求下，使系统的总等效容量最大化. 通过把多维天线下的资源分配问题分解为独立单天线下的子优化问题，有效地降低了算法复杂度. 仿真结果表明，该分配算法能较好地满足比例公平的速率要求；相对于集中式天线系统和固定FDMA分配方式，均有较大的容量提升.
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| 关 键 词： | 分布式天线系统 正交频分多址 比例公平资源分配 天线独立功率限制 |
| 文章编号： | 1007-5321（2007）04-0125-04 |
| 收稿时间： | 2006-10-13 |
| 修稿时间： | 2006-10-12 |
A Proportional Resource Allocation Algorithm for OFDMA Distributed Antenna System |
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| LIU Shen-fa,WU Wei-ling.A Proportional Resource Allocation Algorithm for OFDMA Distributed Antenna System[J].Journal of Beijing University of Posts and Telecommunications,2007,30(4):125-128. |
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| Authors: | LIU Shen-fa WU Wei-ling |
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| Affiliation: | (School of Information Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China) |
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| Abstract: | A sub-carrier and power allocation algorithm is proposed for orthogonal frequency division multiple access(OFDMA) distributed antenna system.It can maximize the effective sum-capacity,and fulfill the proportional rate requirement and per antenna power constraint.Through decomposition,the multi antenna resource allocation problem is divided into several sub-problems on each independent antenna,thus the complexity will be reduced effectively.Simulation shows that the proposed algorithm can fulfill the proportional rate requirement well,and remarkable capacity gain is observed when compared with the centralized antenna system and a fixed FDMA allocation algorithm. |
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| Keywords: | distributed antenna system orthogonal frequency division multiple access proportional resource allocation per antenna power constraint |
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