北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2007, Vol. 30 ›› Issue (4): 125-128.doi: 10.13190/jbupt.200704.125.089

• 研究报告 • 上一篇    下一篇

OFDMA分布式天线系统下的比例公平资源分配算法

刘慎发,吴伟陵   

  1. (北京邮电大学 信息工程学院, 北京 100876)
  • 收稿日期:2006-10-13 修回日期:2006-12-04 出版日期:2007-08-30 发布日期:2007-08-30
  • 通讯作者: 刘慎发

A Proportional Resource Allocation Algorithm for OFDMA Distributed Antenna System

LIU Shen-fa,WU Wei-ling   

  1. (School of Information Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China)
  • Received:2006-10-13 Revised:2006-12-04 Online:2007-08-30 Published:2007-08-30
  • Contact: LIU Shen-fa

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.

关键词: 分布式天线系统, 正交频分多址, 比例公平资源分配, 天线功率限制

Abstract:

A sub-carrier and power allocation algorithm is proposed for OFDMA distributed antenna system, which 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 is reduced greatly. Simulation result shows that the proposed algorithm can fulfill the proportional rate requirement well, and remarkable capacity gain is observed compared with the centralized antenna system and a fixed FDMA allocation algorithm.

Key words: distributed antenna system, orthogonal frequency division multiple access, proportional resource allocation, antenna power constraint

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