| 正交频分复用系统中带比例公平的功率分配算法 |
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| 引用本文： | 王骞,徐景,卜智勇.正交频分复用系统中带比例公平的功率分配算法[J].武汉大学学报(理学版),2006,52(3):361-365. |
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| 作者姓名： | 王骞 徐景 卜智勇 |
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| 作者单位： | 中国科学院,微系统与信息技术研究所,上海,200050 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 针对传统多用户正交频分复用（OFDM）系统中比特和功率分配算法计算复杂度较高、实时性不强、无法保证用户间公平性等问题，提出了一种下行OFDM传输中高效率的线性比特和功率分配算法．该算法能在保证每个用户误比特率（BER）和数据速率要求下，按比例分配用户容量，使总发射功率最小．计算机仿真结果表明，该算法和传统资源分配算法相比，复杂度较小，系统容量在用户间分配得更加公平和合理．
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| 关 键 词： | 正交频分复用 比特和功率分配 比例公平 |
| 文章编号： | 1671-8836(2006)03-0361-05 |
| 修稿时间： | 2005年9月15日 |
Proportional-Fair Power Allocation Algorithm for OFDM Systems |
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| WANG Qian,XU Jing,BU Zhiyong.Proportional-Fair Power Allocation Algorithm for OFDM Systems[J].JOurnal of Wuhan University:Natural Science Edition,2006,52(3):361-365. |
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| Authors: | WANG Qian XU Jing BU Zhiyong |
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| Abstract: | Conventional bit and power allocation algorithms in multiuser OFDM systems have many problems,including high computational complexity, time consuming,and they did not consider the proportional fairness among users.In this paper,we investigate efficient and linear bit and power allocation algorithms in downlink OFDM transmission.This algorithm ensures the proportional fairness among users to minimize the total transmit power while satisfying the rate requirement and BER constraint of each user.Comparison with computer simulation indicates that our approach results in a more efficient assignment of transmit power and with proportional constraints the capacity is distributed more fairly and rationally(among) users. |
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| Keywords: | OFDM(orthogonal frequency division multiplexing) bit and power allocation proportional fairness |
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