多用户MIMO系统低复杂度收发联合波束成形方案
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南京邮电大学通信与信息工程学院,南京邮电大学通信与信息工程学院,南京邮电大学通信与信息工程学院

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国家博士后研究基金


Joint beamforming scheme with low complexity for multiuser MIMO system
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College of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications,College of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications,College of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications

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the national post-doctoral research funding (20090451239).

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    摘要:

    本文基于多用户多输入多输出(MIMO)有限反馈系统提出了一种收发联合波束成形方案。该方案在发送端采用每个用户酉速率控制(PU2RC)波束成形技术,在接收端采用基于信干噪比(SINR)最大化的天线合并算法。天线合并算法利用用户信干噪比(SINR)的广义Rayleigh熵特性寻找最佳的天线合并矢量。仿真结果表明,该方案能充分利用信道信息,不仅改善了传统PU2RC系统的和速率性能,相对于已有的迫零(ZF)联合波束成形方案,对信道状态信息的量化误差的敏感性更低,用户选择算法的复杂度更低,且低速率反馈条件下和速率性能更优。

    Abstract:

    In this paper, a joint beamforming scheme is presented for multiuser multiple input multiple output (MIMO) system with limited feedback. The proposed scheme uses Per-User Unitary Rate Control (PU2RC) at the transmitter and the SINR-maximization-based antenna combining algorithm at the receiver, searching optimal receive combiner by using a generalized Rayleigh-Ritz method. Simulation results show the scheme makes full use of channel information, improves the performance of the conventional PU2RC system, and outperforms the zero forcing (ZF) joint beamforming schemes in terms of the sensitivity to the channel state information (CSI) quantization error, the complexity of user selection, and the sum rate in the case of low feedback rates conditions.

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卢敏,酆广增,孟庆民.多用户MIMO系统低复杂度收发联合波束成形方案[J].数据采集与处理,2012,27(4):

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历史
  • 收稿日期:2011-07-13
  • 最后修改日期:2011-10-10
  • 录用日期:2011-10-25
  • 在线发布日期: 2012-08-21