中国邮电高校学报(英文)

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Adaptive minimum bit feedback for sum-rate analysis in multi-user distributed antenna systems

张晓亮1,纪红1,李曦2   

  1. 1. 北京邮电大学
    2.
  • 收稿日期:2012-07-06 修回日期:2012-12-06 出版日期:2013-04-30 发布日期:2013-04-26
  • 通讯作者: 张晓亮 E-mail:sddavidzhang@163.com
  • 基金资助:

    This paper was supported by the National Natural Science Foundation of China (61271182), the National Science Foundation for Young Scientists of China (61001115), and the Ministry of Industry and Information Technology of the People’s Republic of China (2011ZX03001-007-03).

Adaptive minimum bit feedback for sum-rate analysis in multi-user distributed antenna systems

  • Received:2012-07-06 Revised:2012-12-06 Online:2013-04-30 Published:2013-04-26
  • Contact: Xiao-Liang ZHANG E-mail:sddavidzhang@163.com
  • Supported by:

    This paper was supported by the National Natural Science Foundation of China (61271182), the National Science Foundation for Young Scientists of China (61001115), and the Ministry of Industry and Information Technology of the People’s Republic of China (2011ZX03001-007-03).

摘要:

The paper mainly studies the sum-rate performance of limited feedback (LFB) block-diagonalization (BD) in multi-user distributed antenna system (DAS). As the channel state information (CSI) fed back to base station (BS) is limited, multi-user interference (MUI) is caused inevitably because of the quantization error. Considering the influence of the MUI to the capacity of DAS, we propose a parameter of effective sum-rate ratio (ESRR) to denote the capacity offset under the condition of the BS can get perfect CSI and limited CSI first, then we confirm that the approximated ESRR is very close to actual ESRR got through simulations. After that, based on the approximated ESRR, an adaptive minimum bit feedback scheme which can effectively reduce the overhead of feedback channel and the complexity of the system is proposed. Simulation results show the effectiveness of the proposed scheme.

关键词:

BD, DAS, ESRR, minimum bit feedback

Abstract:

The paper mainly studies the sum-rate performance of limited feedback (LFB) block-diagonalization (BD) in multi-user distributed antenna system (DAS). As the channel state information (CSI) fed back to base station (BS) is limited, multi-user interference (MUI) is caused inevitably because of the quantization error. Considering the influence of the MUI to the capacity of DAS, we propose a parameter of effective sum-rate ratio (ESRR) to denote the capacity offset under the condition of the BS can get perfect CSI and limited CSI first, then we confirm that the approximated ESRR is very close to actual ESRR got through simulations. After that, based on the approximated ESRR, an adaptive minimum bit feedback scheme which can effectively reduce the overhead of feedback channel and the complexity of the system is proposed. Simulation results show the effectiveness of the proposed scheme.

Key words:

BD, DAS, ESRR, minimum bit feedback