北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2009, Vol. 32 ›› Issue (5): 15-19.doi: 10.13190/jbupt.200905.15.lizh

• 论文 • 上一篇    下一篇

MU-MIMO下行链路模式自适应有限反馈机会传输

李钊;杨家玮;姚俊良;陈婷   

  1. (西安电子科技大学 综合业务网国家重点实验室, 西安 710071)
  • 收稿日期:2009-02-19 修回日期:2009-08-01 出版日期:2009-10-28 发布日期:2009-10-28
  • 通讯作者: 李钊

Mode Adaptive Opportunistic Transmission in MU-MIMO Downlink with Limited Feedback

LI Zhao,YANG Jia-wei,YAO Jun-liang,CHEN Ting   

  1. (State Key Laboratory of Integrated Service Networks, Xidian University, Xi'an 710071, China)
  • Received:2009-02-19 Revised:2009-08-01 Online:2009-10-28 Published:2009-10-28
  • Contact: Zhao LI

摘要:

针对多用户多输入多输出(MU-MIMO)下行链路,提出一种基于模式自适应的有限反馈机会
传输策略. 该策略引入门限机制,在每个时隙仅信道质量满足预设门限要求的移动台(MS)选
择适当的传输模式,包括波束成形(BF)和空分复用(SM),并根据传输模式自适应反馈信道信
息. 基站(BS)根据获得的信道信息从候选用户中选择一个进行通信. 最后对所提策略进行理论分析,并通过MonteCarlo仿真证明,该策略能以少量的反馈开销获得高容量,同时保证低的中断概率.

关键词: 多用户, 多输入多输出系统, 自适应, 有限反馈, 波束成形, 空分复用

Abstract:

A mode adaptive opportunistic transmission scheme in multiuser multi-input multioutput(MU-MIMO) downlink with limited feedback is introduced. In each time slot only eligible mobile station (MS) whose channel quality exce
eds a preset threshold would select transmission mode, including eamforming (BF) and spatial multiplexing (SM) and adaptively feed channel information. With feedback information, base station (BS) schedules one user out of candidate MS. Analysis is employed in evaluating the proposed scheme. Monte-Carlo simulation shows that the scheme can achieve high capacity as well as low outage probability with limited feedback cost.

Key words: multiuser, multi-input multi-output systems, adaptive, limited feedback, beamforming, spatial multiplexing