An Algorithm of Robust Beamforming in the Downlink Multiuser MIMO System

SUN Xin; ZHANG qin; MA Peng-fei

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An Algorithm of Robust Beamforming in the Downlink Multiuser MIMO System

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- An Algorithm of Robust Beamforming in the Downlink Multiuser MIMO System
- Acta Electronica Sinica Vol. 37, Issue 3, Pages: 444-448(2009)
- 作者机构：
  
  1. 北京交通大学电子信息工程学院,北京,100044
  2. 中国电子科技集团公司第54研究所,河北,石家庄,050081
  3. 北京交通大学电子信息工程学院北京,100044
  4. 中国电子科技集团公司第54研究所河北石家庄,050081
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN929.5
- Published：2009
- 稿件说明：
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SUN Xin, ZHANG qin, MA Peng-fei. An Algorithm of Robust Beamforming in the Downlink Multiuser MIMO System[J]. Acta Electronica Sinica, 2009, 37(3): 444-448.
DOI：

SUN Xin, ZHANG qin, MA Peng-fei. An Algorithm of Robust Beamforming in the Downlink Multiuser MIMO System[J]. Acta Electronica Sinica, 2009, 37(3): 444-448. DOI：

摘要

提出了一种下行多用户MIMO系统中的鲁棒性线性处理算法.该算法利用了信道均值和天线相关矩阵等信道统计信息

在总发射功率不大于目标值的约束条件下

能够使所有用户的均方误差(total mean square error

TMSE)在随机信道上的平均值最小.该算法不明显依赖瞬时信道信息(channel state information

CSI)

当信道估计得到的CSI不准确时

它能够有效降低由CSI偏差带来的性能损失.仿真结果表明提出的算法能够有效地降低由于不准确CSI带来的误码率和平均MSE的损失.

Abstract

An algorithm of robust linear processing for the downlink multiuser MIMO system with imperfect known CSI is proposed.This algorithm uses stable channel statistics information about the channel mean and antenna correlation

to minimize the average value of the all user’s total mean squared error over stochastic channel under the transmitter sum power constraint.This algorithm does not exactly depend on instantaneous channel information

when CSI obtained by channel estimation is not perfect

the performance loss due to the CSI mismatch can be efficiently reduced.Simulation results demonstrate that the proposed algorithm effectively ameliorate the BER and average MSE due to the CSI mismatch.

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