[1]赵曙光,陈荣,赵敏..基于IEEE 802.11a标准的简单时间同步算法[J].郑州大学学报(工学版),2006,27(03):98-100103.[doi:10.3969/j.issn.1671-6833.2006.03.023]
　Zhao Shuguang,CHEN Rong,Zhao Min.Simple time synchronization algorithm based on IEEE 802.11a standard[J].Journal of Zhengzhou University (Engineering Science),2006,27(03):98-100103.[doi:10.3969/j.issn.1671-6833.2006.03.023]

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基于IEEE 802.11a标准的简单时间同步算法()

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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:

27卷

期数:

2006年03期

页码:

98-100103

栏目:

出版日期:

1900-01-01

文章信息/Info

Title:

Simple time synchronization algorithm based on IEEE 802.11a standard

作者:

赵曙光; 陈荣; 赵敏.

中国电子科技集团公司第28研究所,江苏,南京,210007, 中国电子科技集团公司第28研究所,江苏,南京,210007, 中国电子科技集团公司第28研究所,江苏,南京,210007

Author(s):

Zhao Shuguang; CHEN Rong; Zhao Min

关键词:

OFDM;  训练序列;  时间同步

Keywords:

OFDM;  training sequences;  Time synchronization

DOI:

10.3969/j.issn.1671-6833.2006.03.023

文献标志码:

A

摘要:

时间同步是0FDM系统的关键技术之一,基于IEEE 802.11a标准的训练序列结构,通过改进相关函数和判决条件,提出了一种简单的相关时间同步算法.自相关函数改进之后,明显减小了自相关函数值的波动范围,为最佳判决门限的选择提供了可能.同时,通过增加判决宽度,使得相关算法在大频偏时也能取得良好的效果.仿真结果显示,帧检测概率为90%,频偏为200 kHz时,提出的算法与传统相关算法相比,SNR提高了8 dB.

Abstract:

Time synchronization is one of the key technologies of 0FDM system, based on the training sequence structure of IEEE 802.11a standard, a simple correlation time synchronization algorithm is proposed by improving the correlation function and decision conditions. After the improvement of the autocorrelation function, the fluctuation range of the autocorrelation function value is significantly reduced, which provides a possibility for the selection of the best decision threshold. At the same time, by increasing the judgment width, the relevant algorithm can also achieve good results when the frequency offset is large. The simulation results show that when the frame detection probability is 90% and the frequency offset is 200 kHz, the SNR of the proposed algorithm is improved by 8 dB compared with the traditional correlation algorithm.

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