Timing and Frequency Synchronization Algorithm with Superimposed Weak Power Sequence for OFDM Systems

LUO Ren-ze; GE Yong-hua; DANG Yu-pu; YI Dan; ZHANG Jie; NIU Na

doi:10.3969/j.issn.0372-2112.2012.02.033

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Timing and Frequency Synchronization Algorithm with Superimposed Weak Power Sequence for OFDM Systems

更新时间：2025-07-16

- Timing and Frequency Synchronization Algorithm with Superimposed Weak Power Sequence for OFDM Systems
- Acta Electronica Sinica Vol. 40, Issue 2, Pages: 412-416(2012)
- 作者机构：
  
  1. 西南石油大学电气信息学院,四川,成都,610500
  2. 重庆邮电大学光纤通信重点实验室,重庆,400065
  3. 西南石油大学电气信息学院四川成都,610500
  4. 重庆邮电大学光纤通信重点实验室重庆,400065
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0372-2112.2012.02.033
  CLC： TN919.3
- Published：2012
- 稿件说明：
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LUO Ren-ze, GE Yong-hua, DANG Yu-pu, et al. Timing and Frequency Synchronization Algorithm with Superimposed Weak Power Sequence for OFDM Systems[J]. Acta Electronica Sinica, 2012, 40(2): 412-416.
DOI：

LUO Ren-ze, GE Yong-hua, DANG Yu-pu, et al. Timing and Frequency Synchronization Algorithm with Superimposed Weak Power Sequence for OFDM Systems[J]. Acta Electronica Sinica, 2012, 40(2): 412-416. DOI： 10.3969/j.issn.0372-2112.2012.02.033.

摘要

本文提出一种使用叠加的、弱能量序列进行时间同步和频偏估计的方法

其中所构造的训练序列具有低/零自相关性及弱能量性能

该序列被叠加在信息符号上并仅分配发射机总能量的4.1%;传统利用循环前缀信息估计频偏范围只局限于0.5内

该法使频偏估计范围可达到1

在利用本地序列与接收信号的相关性后可使整个频偏估计范围达到1/4带宽.理论和仿真表明

该法具有比常规算法更优的时间估计精度和频偏估计范围.

Abstract

A novel timing and frequency synchronization method by superimposed sequence with lower power was proposed for OFDM systems.The training sequence

which was constructed and had low/zero autocorrelation and weak energy performance

was superimposed with total energy accounted for only a transmitter total power 4.1 percent on the information symbol.The novel frequency offset estimation range using guard interval is enlarged from 0.5 to 1

while the total frequency offset estimation range is 1/4 bandwidth.Theory and simulation show that the performances of the proposed algorithm are much better than those of the conventional schemes in accuracy and the mean square error.

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