上海交通大学学报

上海交通大学学报（自然版） ›› 2012, Vol. 46 ›› Issue (11): 1821-1825.

• 无线电电子学、电信技术 • 上一篇    下一篇

协作多点系统的本地预编码改进算法

 郑凤, 张婷婷   

  1. (北京邮电大学 网络体系构建与融合实验室， 北京 100876)  
  • 收稿日期:2012-01-09 出版日期:2012-11-30 发布日期:2012-11-30
  • 基金资助:

    国家科技重大专项项目（2011ZX0300100703）,中央高校基本科研业务费专项资金资助项目（G470527）

Improved Local Precoding Scheme for Coordinated Multi-Point Transmission Systems

 ZHENG  Feng, ZHANG  Ting-Ting   

  1. (Laboratory of Network System Architecture and Convergence, Beijing University of Posts and Telecommunications, Beijing 100876, China)
  • Received:2012-01-09 Online:2012-11-30 Published:2012-11-30

摘要： 摘要： 
为了提高LTEAdvanced系统小区边缘用户的吞吐量，在现有协作多点（CoMP）传输方案基础上提出了一种CoMP系统的本地预编码改进算法，以解决传统本地预编码算法在高秩（秩不小于2）信道下的层间干扰问题.该方法在发射端有选择地引入层交换与相位校正操作，并按照接收端信干噪比最大的准则确定交换及校正策略.仿真结果表明，改进算法能有效提高小区边缘用户的谱效率，进而增大小区边缘用户的吞吐量.
关键词： 
协作多点传输； 本地预编码； 层交换； 相位校正； 谱效率
中图分类号：  TN 911.72
文献标志码：  A    

Abstract: To improve the throughput of terminals at cell edge in LTE-Advanced systems, an improved local precoding scheme was proposed for coordinated multipoint (CoMP) transmission systems based on the existing methods, which can solve the problem of inter-layer interference when traditional local precoding is applied in high rank channel, i.e. the rank is larger than 1. The proposed scheme introduces layers swapping and phase correction selectively to the transmitting end, which is determined by maximizing the signal-to-interference plus noise at the receiving end. The simulation results show that the proposed scheme can improve the spectral efficiency of users at cell edge, and then improve their throughput.  

Key words: coordinated multi-point (CoMP) transmission, local precoding, layers swapping, phase correction, spectral efficiency