| 基于最小均方误差的多用户MIMO系统下行链路预编码 |
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| 引用本文： | 李新民,白宝明.基于最小均方误差的多用户MIMO系统下行链路预编码[J].重庆邮电学院学报(自然科学版),2010(1). |
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| 作者姓名： | 李新民 白宝明 |
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| 作者单位： | 西安科技大学;西安电子科技大学综合业务网国家重点实验室; |
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| 基金项目： | 国家自然基金委-广东省联合基本重点项目(U0635003) |
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| 摘 要： | 针对多输入多输出(multple input multiple output,MIMO)系统下行链路的迫零预编码方法在块对角化的基础上追求最大化系统和容量,而并未考虑接收信号的均方误差,从接收信号具有最小均方误差的角度设计了多用户MIMO系统的下行链路预编码的方案,称为块对角化最小均方误差方案。理论分析和仿真结果表明,该方案相较于迫零算法具有较小的接收信号均方误差及较好的误码率性能,并且保持了迫零算法绝大部分的系统和容量,它在系统误码率与和容量方面提供了一种较好的折中。
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| 关 键 词： | 多输入多输出 迫零 最小均方误差 |
Precoding based on minimum mean square error for multi-user MIMO downlinks |
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| LI Xin-min,BAI Bao-ming.Precoding based on minimum mean square error for multi-user MIMO downlinks[J].Journal of Chongqing University of Posts and Telecommunications(Natural Sciences Edition),2010(1). |
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| Authors: | LI Xin-min BAI Bao-ming |
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| Institution: | 1.Xi'an University of Science and Technology;Xi'an 710054;P.R.China;2.State Key Lab of Integrated Service Networks;Xidian University;Xi'an 710071;P.R.China |
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| Abstract: | Different from traditional zero forcing(ZF) algorithm for MIMO downlinks based on block diagonalization(BD) to maximize system sum rate without considering mean square error of received signal,a new method of precoding for multi-user MIMO downlinks,which is called BD-MMSE,is proposed via minimum mean square error(MMSE) criterion.Theoretical analysis and simulation results show that BD-MMSE is a good tradeoff between system sum capacity and BER performance.Compared with ZF algorithm,BD-MMSE has less mean squ... |
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