电子学报 ›› 2014, Vol. 42 ›› Issue (9): 1781-1785.DOI: 10.3969/j.issn.0372-2112.2014.09.18

• 学术论文 • 上一篇    下一篇

MIMO-OFDM系统训练序列构造及其同步方法

罗仁泽, 杨娇, 李芮, 牛娜, 党煜蒲, 付元华, 曹鹏   

  1. 西南石油大学电气信息学院, 四川成都 610500
  • 收稿日期:2013-05-02 修回日期:2014-03-10 出版日期:2014-09-25 发布日期:2014-09-25
  • 作者简介:罗仁泽 男,1973年9月出生于四川省内江市,博士,教授,博士生导师.主要从事通信信号处理技术研究.已在国内外核心刊物及国际学术会议发表学术论文96篇,其中EI、ISTP检索35篇;独立出版学术专著1部. E-mail:lrzsmith@126.com;杨 娇 女,1990年12月出生于新疆伊宁市,现就读于西南石油大学电气信息学院研究生.研究方向:OFDM系统及MIMO-OFDM系统同步技术. E-mail:yangjiao113@126.com
  • 基金资助:

    国家自然科学基金(No.61072073,No.61310306022);四川省千人计划引进人才基金;西南石油大学油气号检测与信息处理青年科研创新培育团对基金(No.2013XJZT007)

The Construct of Training Sequence and Synchronization for MIMO-OFDM System

LUO Ren-ze, YANG Jiao, LI Rui, NIU Na, DANG Yu-pu, FU Yuan-hua, CAO Peng   

  1. School of Electrical Engineering and Information, Southwest Petroleum University, Chengdu, Sichuan 610500, China
  • Received:2013-05-02 Revised:2014-03-10 Online:2014-09-25 Published:2014-09-25

摘要:

针对MIMO-OFDM系统对同步错误率和载波频偏特别敏感问题,本文提出了MIMO-OFDM系统训练序列构造及其同步方法.该同步方法设计的训练序列由两个结构不同的序列构成:第一个序列利用重复性构成,第二个序列利用反对称性构成,其构造训练序列中的β因子影响系统定时同步性能.在接收端,利用训练序列和本地数据信号进行互相关获取定时同步,在获取精确地定时同步后进行小数频偏估计和整数频偏估计,其整数频偏估计范围可达到1/4带宽.通过理论分析和仿真表明:本文提出的同步新方法比常规方法有更好的同步性能,并且降低了系统计算复杂度.

关键词: MIMO-OFDM系统, 训练序列, 时间同步, 频率同步

Abstract:

To reduce synchronization error and sensitivity to carrier frequency offset of MIMO-OFDM system,this paper proposes that construction of training sequence and synchronization method for MIMO-OFDM system.The training sequences of the synchronization method consist of two sequences of different structures:the first one is repetitive and the second one is antisymmetric.The factor β in the training sequences affects timing synchronization performance of the system.The timing synchronization is caught At the receiver by cross-correlating the training sequence and the local signal.The fractional frequency offset and integer frequency offset are estimated after catching precise timing synchronization,with the range of the integer frequency offset estimation being one-quarter of the bandwidth.Theoretical analysis and simulation show that the proposed synchronization has better synchronization performance than the conventional methods and reduces the computational complexity.

Key words: MIMO-OFDM system, training sequence, timing synchronization, frequency synchronization

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