Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (10): 30-33.

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Effects of Imperfect Channel State Information on Performance of Multiuser-MIMO System

Liu Xue-fang  Fu Feng-lin  Lu Zhao-yang   

  1. State Key Laboratory of Integrated Service Networks, Xidian University, Xi＇an 710071, Shaanxi, China
  • Received:2008-10-20 Revised:2008-12-19 Online:2009-10-25 Published:2009-10-25
  • Contact: 刘雪芳（1977-），女，讲师，在职博士生，主要从事多天线系统、宽带通信研究． E-mail:snowflier-liu@163．com
  • About author:刘雪芳（1977-），女，讲师，在职博士生，主要从事多天线系统、宽带通信研究．
  • Supported by:

    高等学校学科创新引智计划资助项目（B08038）

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Abstract:

In this paper, the impacts of such imperfect channel state information as the feedback delay and the channel estimation error on the performance of closed-loop multiuser-MIMO system based on antenna selection are analyzed, and the analytical expressions of both the outage capacity and the bit error rate are deduced. Moreover, the effect of muhiuser diversity on the system performance is revealed. Theoretical analyses show that the system performance degrades due to the feedback delay and the estimation error. Numerical simulations indicate that the theoretical analyses are valid and reasonable.

Key words: feedback delay, channel estimation error, multiuser-MIMO system, outage capacity, muhiuser diversity, bit error rate