一种新型OOFDM 符号同步技术

doi:10.3969/j.issn.1007-2861.2013.02.005

上海大学学报(自然科学版) ›› 2013, Vol. 19 ›› Issue (2): 132-137.doi: 10.3969/j.issn.1007-2861.2013.02.005

一种新型OOFDM 符号同步技术

倪宝景, 李迎春, 韩景龙, 姜鹏, 傅磊

上海大学特种光纤与光接入网省部共建重点实验室, 上海200072

收稿日期:2012-11-28 出版日期:2013-04-30 发布日期:2013-04-30
通讯作者: 李迎春(1962—), 男, 研究员, 研究方向为光纤通信. E-mail:liyingchun@shu.edu.cn
基金资助:
上海市科委基金资助项目(11510500500, 11511502500)

A New Technique of Symbol Synchronization for OOFDM

NI Bao-jing, LI Ying-chun, HAN Jing-long, JIANG Peng, FU Lei

Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200072, China

Received:2012-11-28 Online:2013-04-30 Published:2013-04-30

摘要/Abstract

摘要： 提出了一种简单、低复杂度、鲁棒性强的光正交频分复用(optical orthogonal frequency division multiplexing, OOFDM) 符号同步技术, 并予以实验验证. 算法的主要思想是在OFDM 符号的第0 子载波上加载编码的直流(direct current, DC)信号, 达到在接收端进行OFDM 帧同步和符号同步的目的. 由于该技术利用了本就闲置的第0 子载波, 不会额外损耗系统的带宽, 因此, 适用于OFDM 无源光网络(OFDM-passive optical network, OFDM-PON)系统. 在20 km标准单模光纤通信系统中, 运用该同步算法实现了2.667 Gbit/s的实时数据传输. 该技术还提供了在物理层增加网络安全机制的功能, 实现了点到点和点到多点的OOFDM 网络的符号同步.

关键词: 同步算法, 光正交频分复用, 正交频分复用-无源光网络

Abstract: A simple, low cost and robust scheme for optical orthogonal frequency division multiplexing (OOFDM) symbol synchronization is proposed and experimentally tested. The main idea is to load a direct current (DC) signal on a special subcarrier to achieve OFDM symbol synchronization at the receiver.
This techniqueis applicable to OFDM-PON (OFDM-passive optical network) system without additional bandwidth as the first zero subcarrier does not have any signal loaded originally. Using the proposed scheme, a real-time optical OFDM signal transmission at 2.667 Gbit/s over 20 km standard single-mode fiber is achieved. This scheme also offers an additional network security mechanism on the physical layer. Most importantly, it provides online real-time symbol synchronization for point-to-point and point-to-multipoint OOFDM network.

Key words: OFDM-passive optical network (OFDM-PON), optical orthogonal frequency division multiplexing (OOFDM), synchronization algorithm

中图分类号:

TN 915.63

倪宝景, 李迎春, 韩景龙, 姜鹏, 傅磊. 一种新型OOFDM 符号同步技术[J]. 上海大学学报(自然科学版), 2013, 19(2): 132-137.

NI Bao-jing, LI Ying-chun, HAN Jing-long, JIANG Peng, FU Lei. A New Technique of Symbol Synchronization for OOFDM[J]. Journal of Shanghai University（Natural Science Edition）, 2013, 19(2): 132-137.

参考文献

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[8] Yu X F, Lv T J, Gao H, et al. Hybrid subcarrier exclusivity and sharing scheme with optimized bit loading in uplink multi-cell OFDMA system [C]//Wireless Communications and Networking Conference. 2011: 28-31.

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一种新型OOFDM 符号同步技术

A New Technique of Symbol Synchronization for OOFDM

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