7th International Conference on Communications and Networking in China

Research Article

MIMO System Capacity with Imperfect Feedback Channel

  • @INPROCEEDINGS{10.1109/ChinaCom.2012.6417515,
        author={Wen Zhou and Caihong Kai and Xutao Li},
        title={MIMO System Capacity with Imperfect Feedback Channel},
        proceedings={7th International Conference on Communications and Networking in China},
        publisher={IEEE},
        proceedings_a={CHINACOM},
        year={2012},
        month={10},
        keywords={mimo feedback snr closed-loop capacity},
        doi={10.1109/ChinaCom.2012.6417515}
    }
    
  • Wen Zhou
    Caihong Kai
    Xutao Li
    Year: 2012
    MIMO System Capacity with Imperfect Feedback Channel
    CHINACOM
    IEEE
    DOI: 10.1109/ChinaCom.2012.6417515
Wen Zhou1,*, Caihong Kai2, Xutao Li1
  • 1: Shantou University
  • 2: Hefei University of Technology
*Contact email: wenzhou@ustc.edu

Abstract

The capacity for multiple-input multiple-output (MIMO) with imperfect feedback channel is investigated. The expression of closed-loop MIMO capacity with imperfect feedback has been derived. A system capacity indicator, the feedback signal to noise ratio (SNR), that is used to measure the capacity gain of the closed-loop capacity over that of the open-loop capacity, has been proposed and investigated. Based on the derived closed form expression for the closed-loop MIMO capacity, the lower threshold of feedback SNR is derived and subsequently examined by numerical method. Numerical results show that the lower threshold of feedback SNR is increased with increasing antenna numbers and increasing MIMO system SNR.