5th International ICST Conference on Communications and Networking in China

Research Article

A probabilistic-constrained leakage-based beamforming for downlink multiple stream MU-MIMO system

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  • @INPROCEEDINGS{10.4108/chinacom.2010.62,
        author={Huiqin Du and Pei-Jung Chung},
        title={A probabilistic-constrained leakage-based beamforming for downlink multiple stream MU-MIMO system},
        proceedings={5th International ICST Conference on Communications and Networking in China},
        publisher={IEEE},
        proceedings_a={CHINACOM},
        year={2011},
        month={1},
        keywords={Array signal processing Hip Interference MIMO Probabilistic logic Robustness Signal to noise ratio},
        doi={10.4108/chinacom.2010.62}
    }
    
  • Huiqin Du
    Pei-Jung Chung
    Year: 2011
    A probabilistic-constrained leakage-based beamforming for downlink multiple stream MU-MIMO system
    CHINACOM
    ICST
    DOI: 10.4108/chinacom.2010.62
Huiqin Du1,*, Pei-Jung Chung1,*
  • 1: School of Engineering, The University of Edinburgh, UK
*Contact email: H.Du@ed.ac.uk, P.Chung@ed.ac.uk

Abstract

Multi-user multiple-input and multiple-output (MU-MIMO) wireless system has the potential to provide a substantial gain by using transmit beamforming. The main challenge for transmit beamforming design is to suppress the interference from other users/data with imperfect channel state information at transmitter (CSIT). We propose a probabilistic-constrained beamforming design that combines the SLNR criteria with Alamouti coding for the multiple-stream-per-user MU-MIMO system. The proposed beamformer maximizes the average system performance and exterminates inter-data-interference while guaranteeing a low outage probability of serious leakage power performance. Simulation results show that the proposed beamformer achieves the highest signal-to-interference-and-noise ratio (SINR) reliability and provides the strongest robustness against channel imperfections, among the state-of-art transmit beamformers.