English

应用科学学报 ›› 2005, Vol. 23 ›› Issue (4): 355-358.

• 论文 • 上一篇    下一篇

基于最小速率的MIMO多接入信道容量和最优功率分配策略

潘成康, 蔡跃明, 徐友云   

  1. 解放军理工大学通信工程学院, 江苏南京 210007
  • 收稿日期:2004-03-31 修回日期:2004-06-10 出版日期:2005-07-31 发布日期:2005-07-31
  • 作者简介:潘成康(1978-),男,江苏泗洪人,博士生,E-mail:panck7855@163.com;蔡跃明(1961-),男,福建永泰人,教授,博导,E-mail:caiym@vip.sina.com;徐友云(1966-),男,浙江兰溪人,教授,博导,E-mail:yyxu@vip.sina.com
  • 基金资助:
    国家自然科学基金资助项目(60372080);江苏省自然科学基金资助项目(BK200414)

Minimum-Rate Capacity and Optimal Power Allocation for MIMO Fading Multiaccess Channels

PAN Cheng-kang, CAI Yue-ming, XU You-yun   

  1. Institute of Communications Engineering, PLA University of Science and Technology, Nanjing 210007, China
  • Received:2004-03-31 Revised:2004-06-10 Online:2005-07-31 Published:2005-07-31

PDF

64

被引次数

1

摘要： 分析了平均功率受限条件下,基于最小速率约束的MIMO多接入信道容量域,并给出了最优功率分配策略.策略分为两个步骤:第一步分配给每个用户所有信道状态下,保证最小速率的最小功率;第二步采用多级注水分配剩余功率最大化遍历容量.分析表明顺序译码是获取容量的有效手段,数值结果显示出,策略在满足最小速率约束要求下获得了显著的容量增益,取得了很好的性能折衷.

关键词: 多接入信道, 最小速率容量, 功率分配, 多输入多输出

Abstract: The capacity region with average power constraints of MIMO fading multi-access channels based on minimum rate requirements is analyzed and the optimal power allocation strategy is suggested.The strategy is a two-step process, the allocation of the minimum power required to achieve the minimum rates and the optimal allocation of the excess power to maximize the ergodic rates.It is shown the minimum-rate capacity can be achieved by successive decoding.The numerical results show that, the strategy provides notable capacity gain and good tradeoff in performance.

Key words: multi-access channel, MIMO, minimum-rate capacity, power allocation

中图分类号: