Journal of Systems Engineering and Electronics ›› 2009, Vol. 31 ›› Issue (1): 18-20,82.

• 电子技术 • 上一篇    下一篇

基于叠加训练序列的MIMO信道估计及其性能分析

肖海林1, 欧阳缮1, 聂在平2, 陈紫强1   

  1. 1. 桂林电子科技大学信息与通信学院, 广西, 桂林, 541004;
    2. 电子科技大学电子工程学院, 四川, 成都, 610054
  • 收稿日期:2007-09-10 修回日期:2008-09-02 出版日期:2009-01-20 发布日期:2010-01-03
  • 作者简介:肖海林(1976- ),男,副教授,博士,主要研究方向为新一代无线通信天线分集技术、信道建模、信道估计以及信道编码.E-mail:xhl_xiaohailin@163.com
  • 基金资助:
    国家“973”高技术计划基金(2008CB317109);国家“863”高技术计划基金(2002AA123032);国家自然科学基金(60572054);桂林电子科技大学博士启动基金(Z20706);广西信息与通讯技术重点实验室(10903)资助课题

MIMO channel estimation and performance analysis using superimpose training sequences

XIAO Hai-lin1, OUYANG Shan1, NIE Zai-ping2, CHEN Zi-qiang1   

  1. 1. Coll. of Information and Communication, Guilin Univ. of Electronic and Technology, Guilin 541004, China;
    2. Coll. of Electronic Engineering, Univ. of Electronic Science and Technology of China, Chengdu 610054, China
  • Received:2007-09-10 Revised:2008-09-02 Online:2009-01-20 Published:2010-01-03

摘要: 提出一种基于叠加训练序列的MIMO信道估计模型,该模型信道估计方法不占用额外的信号带宽并具有较高的估计精度。通过最小二乘(LS)方法,推导出模型信道估计误差的均方差、信道容量的下限以及更加紧凑的Cramer-Rao界。数值模拟结果表明,相同条件下,采用叠加的训练序列要比直接采用训练序列对系统容量的改善5 dB左右。此外,模型所采用的算法结构简单,计算量小,有很大的实际应用前景。

Abstract: An MIMO channel estimation model using superimposed training sequences is proposed,which doesn’t take any extra signal spectral and has high accuracy.Through exploiting the least square method,a closed-form solution for the estimation of variance and the lower bound of channel capacity,as well as a rather compact Cramer-Rao bound are derived.Simulation results show that the system has higher performance by using superimposed training sequences than that using training sequences,which is improved about 5 dB.Moreover,the algorithm has a simple structure and low computation complexity,which is very promising in the reality wireless communication.

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