计算机应用 ›› 2013, Vol. 33 ›› Issue (11): 3042-3044.

• 网络与通信 • 上一篇    下一篇

利用多级线性预测改善有限反馈系统反馈量

曾仕伦,徐家品   

  1. 四川大学 电子信息学院,成都 610064
  • 收稿日期:2013-05-14 修回日期:2013-07-18 出版日期:2013-11-01 发布日期:2013-12-04
  • 通讯作者: 曾仕伦
  • 作者简介:曾仕伦(1988-),男,四川眉山人,硕士研究生,主要研究方向:多媒体通信与信息系统、第四代移动通信;徐家品(1957-),男,四川成都人,教授,主要研究方向:多媒体通信与信息系统、第四代移动通信。

Improving amount of feedback in limited feedback systems with multi-level linear prediction

ZENG Shilun,XU Jiapin   

  1. College of Electronics and Information Engineering, Sichuan University, Chengdu Sichuan 610064, China
  • Received:2013-05-14 Revised:2013-07-18 Online:2013-12-04 Published:2013-11-01
  • Contact: ZENG Shilun

摘要: 以先进的长期演进技术(LTE-Advanced)为背景,针对多输入多输出(MIMO)系统中基于码本的有限反馈技术进行了研究,提出了一种基于多级线性预测的有限反馈新方法。利用信道的时间相关性,对信道值进行多级线性预测,以预测误差为基础,通过最小化均方误差来设计量化码本,将码本中对应的码字序号用于系统反馈。仿真结果表明:采用多级线性预测能有效地降低系统预测误差,等效地,减小了系统的反馈开销,最大降低幅度能达到15%。

关键词: 多输入多输出, 有限反馈, 反馈量, 多级线性预测, 矢量量化

Abstract: In this paper, the limited feedback techniques based on the codebook for Multiple-Input Multiple-Output (MIMO) system in the Long Term Evolution-Advanced (LTE-Advanced) applications were investigated. A new limited feedback technique based on multi-level linear prediction was proposed. This method utilized the time correlation of the channel to predict the value of the channel based on multi-level linear prediction. By minimizing the mean square error to design a quantization code book in the basis of the prediction error, code number in the code book was used for system feedback. The simulation results show that multi-level linear prediction can effectively reduce the system prediction error, equivalently, reducing feedback overhead of the system and the maximum reduction rate of 15% to the amount of system feedback that can be reached.

Key words: Multiple-Input Multiple-Output (MIMO), limited feedback, amount of feedback, multi-level linear prediction, vector quantization

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