5th International ICST Conference on Communications and Networking in China

Research Article

User grouping based on large scale channel information in multi-cell downlink cooperative multi-antenna systems

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  • @INPROCEEDINGS{10.4108/chinacom.2010.1,
        author={Can Sun and Chenyang Yang and Yonghui Li and Branka Vucetic},
        title={User grouping based on large scale channel information in multi-cell downlink cooperative multi-antenna systems},
        proceedings={5th International ICST Conference on Communications and Networking in China},
        publisher={IEEE},
        proceedings_a={CHINACOM},
        year={2011},
        month={1},
        keywords={Antennas Downlink Interference Niobium Signal to noise ratio Simulation Throughput},
        doi={10.4108/chinacom.2010.1}
    }
    
  • Can Sun
    Chenyang Yang
    Yonghui Li
    Branka Vucetic
    Year: 2011
    User grouping based on large scale channel information in multi-cell downlink cooperative multi-antenna systems
    CHINACOM
    ICST
    DOI: 10.4108/chinacom.2010.1
Can Sun1,*, Chenyang Yang1,*, Yonghui Li2,*, Branka Vucetic2,*
  • 1: Beihang University, Beijing, China
  • 2: University of Sydney, Sydney, Australia
*Contact email: saga@ee.buaa.edu.cn, cyyang@buaa.edu.cn, lyh@ee.usyd.edu.au, branka@ee.usyd.edu.au

Abstract

In this paper, we study low feedback user grouping in downlink cooperative transmission multi-antenna systems. Users in the same group are served on the same frequency and time resource by multiple cooperative BSs using the zero-forcing precoder. We first derive the user's average received signal to interference and noise ratio (SINR). It shows that each user's SINR is an increasing function of the large scale signal to interference ratio (SIR) of users in neighbor cells, which can be obtained using the large scale channel information. We then propose a novel fair user grouping algorithm based on the large scale SIR. Simulation results show that our algorithm achieves better cell edge throughput compared with existing methods with minor reduction of cell throughput.