5th International ICST Conference on Wireless Internet

Research Article

Limited feedback scheme based on zero-forcing precoding for multiuser MIMO-OFDM downlink systems

Download813 downloads
  • @INPROCEEDINGS{10.4108/ICST.WICON2010.8548,
        author={Zhiyong Chen and Wenbo Wang and Mugen Peng and Fengming Cao},
        title={Limited feedback scheme based on zero-forcing precoding for multiuser MIMO-OFDM downlink systems},
        proceedings={5th International ICST Conference on Wireless Internet},
        publisher={IEEE},
        proceedings_a={WICON},
        year={2010},
        month={4},
        keywords={Zero-forcing precoding CQI CDI MMSE MU-MIMO},
        doi={10.4108/ICST.WICON2010.8548}
    }
    
  • Zhiyong Chen
    Wenbo Wang
    Mugen Peng
    Fengming Cao
    Year: 2010
    Limited feedback scheme based on zero-forcing precoding for multiuser MIMO-OFDM downlink systems
    WICON
    IEEE
    DOI: 10.4108/ICST.WICON2010.8548
Zhiyong Chen1,*, Wenbo Wang1, Mugen Peng1, Fengming Cao2
  • 1: Key Laboratory of Universal Wireless Communications for Ministry of Education, Beijing University of Posts and Telecommunications, China
  • 2: Telecom Research Lab, Toshiba Research Europe Ltd, 32 Queen Square, Bristol, UK, BS1 4ND
*Contact email: zhiyong2084@gmail.com

Abstract

Conventional zero-forcing precoding was well investigated, but it hadn't considered the channel quality indicator (CQI) mismatch for practical system with limited feedback. This paper studies a novel zero-forcing precoding with channel quality indicator (CQI) estimation and adjusting, channel directional information(CDI) quantization, user scheduling and link adaptation and then proposes a CQI estimation algorithm for multiuser multiple input multiple output antenna (MU-MIMO) downlink systems with limited feedback. Simulation with 3GPP long term evolution system demonstrates that the scheme with proposed method can significantly improve system performance, compared with conventional zero-forcing precoding and single user MIMO systems.