English

应用科学学报 ›› 2012, Vol. 30 ›› Issue (1): 39-44.doi: 10.3969/j.issn.0255-8297.2012.01.007

• 通信工程 • 上一篇    下一篇

多用户OFDM双向中继权衡公平性和总速率资源优化

唐伦1, 刘进1, 李国军2, 陈前斌1, 王光宇1   

  1. 1. 重庆邮电大学移动通信重点实验室，重庆400065
    2. 重庆通信学院通信指挥系，重庆400035
  • 收稿日期:2011-04-26 修回日期:2011-08-30 出版日期:2012-02-09 发布日期:2012-01-30
  • 作者简介:唐伦，博士，副教授，研究方向：新一代无线通信技术，E-mail: tangl@cqupt.edu.cn；陈前斌，教授，博导，研究方向：下一代网路、个人通信，E-mail：chenqb@cqupt.edu.cn
  • 基金资助:

    国家科技重大专项基金(No.2011ZX03003-003-02)； 国家自然科学基金(No.60972070, No.61171111)； 重庆市自然科学基金(No.CSTC2009BA2090)；重庆市教委项目基金(No.KJ100514)；重庆邮电大学博士启动基金(No.A2011-2)；重庆市科委重点实验室专项经费；重庆邮电大学自然科学基金(No.A2011-10)资助

Resource Optimization for Fairness and Sum Rate Tradeoff in Multiuser OFDM-Based Two-Way Relaying

TANG Lun1, LIU Jin1, LI Guo-jun2, CHEN Qian-bin1, WANG Guang-yu1   

  1. 1. Key Laboratory of Mobile Communication Technology, Chongqing University of Posts
    and Telecommunications, Chongqing 400065, China
    2. Department of Communication Commanding, Chongqing Communication Institute, Chongqing 400035, China
  • Received:2011-04-26 Revised:2011-08-30 Online:2012-02-09 Published:2012-01-30

PDF

1395

被引次数

6

摘要：

摘要： 在OFDM协作双向中继网络中，当多个用户对借助AF（amplify and forward）双向中继相互通信时，用
户对之间的公平性与系统总速率不能同时兼顾. 该文提出一种用户对速率成比例性公平，并与系统总速率折中的
次优资源分配策略. 该策略以最大化双向中继系统总速率为目标，在总功率及用户对的速率成比例约束下分两步
进行. 首先在每个子载波等功率假设条件下进行用户对速率成比例公平的子载波优化，使系统总速率得以提升. 然
后在保证公平性前提下采用一种迭代的功率分配方法将总功率分配到各个子载波，使系统总速率再次得到提升.
仿真结果表明，所提出的策略在保证用户对速率成一定比例的前提下有效地提高了系统总速率.

关键词: 正交频分复用, 双向中继, 比例公平, 子载波优化, 功率优化

Abstract:

Abstract: In OFDM-based cooperative two-way relay networks, sum rate and fairness among user pairs cannot
be achieved simultaneously when these user-pairs exchange their information respectively via an amplify-andforward two-way relay. This paper proposes a novel suboptimal resource allocation scheme to trade off the
proportional fairness and the system sum rate. This scheme is divided into two steps to maximize the sum rate
of the system subject to the constraints of total power and proportionality among user-pair data rate. First,
sub-carrier optimization is processed with equal power among every subcarrier to achieve proportional fairness
and improve the system sum rate. To further improve the sum rate while maintaining fairness, the total power
is allocated to every sub-carrier with an iterative power allocation algorithm. Simulation demonstrates that
the proposed scheme of resource allocation can achieve good tradeoff between proportional fairness and system sum rate.
Keywords:

Key words: OFDM, two-way relaying, proportional fairness, sub-carrier optimization, power optimization

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