中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2012, Vol. 31 ›› Issue (4): 910-913.DOI: 10.3969/j.issn.1674-0696.2012.04.41

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适用于OFDM 系统的符号定时盲同步技术

许炜阳   

  1. 重庆大学通信工程学院,重庆400044
  • 收稿日期:2012-05-28 修回日期:2012-06-04 出版日期:2012-08-15 发布日期:2015-03-12
  • 作者简介:许炜阳( 1982—) ,男,重庆人,讲师,博士,主要从事无线传输技术、同步、信号检测与估计等研究。E-mail:weiyangxu@cqu.edu.cn.
  • 基金资助:
    重庆市自然科学基金资助项目( CSTCJJA40027) ;

A Blind Symbol Timing Offset Estimation Scheme for OFDM Systems

Xu Wei-yang   

  1. College of Communication Engineering,Chongqing University,Chongqing 400044,China
  • Received:2012-05-28 Revised:2012-06-04 Online:2012-08-15 Published:2015-03-12

摘要: 针对已有算法只适用于恒定包络调制星座图的限制,提出了一种适用于任意星座图映射的OFDM系统的符号 定时盲同步方法。通过最大化接收信号的非高斯性,接收机可以将DFT窗口的起始点锁定在安全区域内以完成符 号定时同步。利用滑动窗口进一步提高算法精度。仿真结果证明了算法的有效性。

关键词: 正交频分复用, 符号定时, 盲同步, 非高斯性, 峰度, 恒定包络调制星座图

Abstract: In the light of limitation of relying on constant modulus constellation in the existing method,a blind symbol timing synchronization technique applicable for arbitrary constellations is proposed. Through maximizing the non-Gaussianity of the signal in the receiver end,this scheme could lock the start point of the DFT window into the safe region,thus the synchronization is obtained. With the exploitation of sliding window,the estimation accuracy can be further improved. The simulation result proves the efficiency of the proposed method.

Key words: orthogonal frequency division multiplexing( OFDM) ;symbol timing offset;blind synchronization;non-Gaussianity, kurtosis;constant modulus constellation

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