北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2005, Vol. 28 ›› Issue (6): 79-83.doi: 10.13190/jbupt.200506.79.wangyf

• 研究报告 • 上一篇    下一篇

零空间约束加强的多用户MIMO检测技术

王亚峰1,张峻峰2,章健1,杨大成1   

  1. 1北京邮电大学 电信工程学院, 北京 100876; 2中兴通讯股份有限公司 移动事业部, 深圳 518057
  • 出版日期:2005-12-28 发布日期:2005-12-28

Detection Algorithm Based on an Enhanced Null Space Constraint for MultiUser MIMO Systems

WANG Yafeng1,ZHANG Junfeng2,ZHANG Jian1,YANG Dacheng1   

  1. 1 Shcool of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China;2 Mobile Division, ZTE Corporation, Shenzhen 518057, China
  • Online:2005-12-28 Published:2005-12-28

摘要:

提出了1种用于多用户多天线系统(MIMO)下行链路的空分多址发送预滤波技术,通过在目前已有的基于块对角化的联合TxRx MMSE算法的基础上,增加新的约束条件,使等效信道由块对角化矩阵变为完全对角化矩阵,就可以在发送端同时将多用户干扰(MUI)和用户内部各路数据流之间的干扰完全消除. 对于完全对角化的1种常见的算法是信道反转,通过性能分析和仿真,可以看出所提算法比信道反转算法有更好的性能.

关键词: 空分多址, 多用户干扰, 块对角化, 完全对角化

Abstract:

A Transmit Preprocessing Technique for Downlink Spatial Multiplexing in Multi-user MIMO Channels was proposed. Through adding additional constraint to the joint TxRx MMSE optimization scheme the equivalent channel could be changed from block diagonalization to complete diagonalization. MUI (multi-user interference) and per user multi stream interference could be canceled simultaneously. The modified algorithm is much more feasible and has the advantage of simplifying the receivers. A general complete diagonalization is the channel inversion algorithm. Performance analysis and comparison prove the complete diagonalization algorithm proposed has better performance than channel inversion algorithm.

Key words: spatial division multiple access, multi-user interference, block diagonalization, complete diagonalization

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