Superimposed training sequence timing synchronization method for ACO-OFDM systems

Ge Yonghua1; Luo Renze1; Dang Yipu2; Yi Dan2

doi:10.13756/j.gtxyj.2011.06.014

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Superimposed training sequence timing synchronization method for ACO-OFDM systems

- Superimposed training sequence timing synchronization method for ACO-OFDM systems
- Study on Optical communication Issue 6, Pages: 38-40(2011)
- 作者机构：
  
  1. 重庆邮电大学光纤通信重点实验室光互联网研究所
  2. 西南石油大学电气信息学院
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2011.06.014
  CLC： TN919.3
- Published：2011，
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[1]戈勇华,罗仁泽,党煜蒲,易丹.ACO-OFDM系统叠加训练序列时间同步方法[J].光通信研究,2011(06):38-40+47.

Ge Yonghua1, Luo Renze1, Dang Yipu2, et al. Superimposed training sequence timing synchronization method for ACO-OFDM systems. [J]. (6):38-40(2011)
[1]戈勇华,罗仁泽,党煜蒲,易丹.ACO-OFDM系统叠加训练序列时间同步方法[J].光通信研究,2011(06):38-40+47. DOI： 10.13756/j.gtxyj.2011.06.014.

Ge Yonghua1, Luo Renze1, Dang Yipu2, et al. Superimposed training sequence timing synchronization method for ACO-OFDM systems. [J]. (6):38-40(2011) DOI： 10.13756/j.gtxyj.2011.06.014.

摘要

针对插入序列降低频带利用率的问题

提出了叠加序列的时间同步方法。通过将复数序列构造具有共轭对称结构

IF-FT（快速傅里叶逆变换）后得到实数具有镜像反函数特性的序列线性叠加在OFDM（正交频分复用）符号上

解决了传统插入序列独占发射功率的缺陷。仿真表明

与传统方法相比

该方法在低信噪比下具有更高的同步准确率

同时提高了系统频谱利用率。

Abstract

As the conventional insertion sequence lowers the bandwidth efficiency

a superimposed training sequence timing synchronization method is proposed.Using the complex sequence in the time domain

a conjugate symmetrical structure is constructed and the sequence linearity with mirror inverse function features of the real numbers obtained after IFFT is linearly superimposes on OFDM symbols so as to remove the drawback that the traditional insertion sequence monopolizes the transmitting power.Simulation results indicate that compared with the conventional ones

this method has higher synchronization accuracy rate and improves the system spectrum efficiency in low SNR.

关键词

非均匀限幅光正交频分复用叠加训练序列时间同步

Keywords

asymmetrically clipped optical-orthogonal frequency division multiplexingsuperimposed training sequencetiming synchronization

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