基于级联变系数训练序列和预增强技术的直接检测光OFDM系统实验研究

doi:10.3969/j.issn.1000-436X.2013.12.017

通信学报 ›› 2013, Vol. 34 ›› Issue (12): 149-157.doi: 10.3969/j.issn.1000-436X.2013.12.017

基于级联变系数训练序列和预增强技术的直接检测光OFDM系统实验研究

吴巍^1,²,肖江南^1,²,陈明^1,²,余建军^1,²,陈林^1,²

¹ 湖南大学信息科学与工程学院，湖南长沙 410082
² 湖南大学微纳光电器件及应用教育部重点实验室，湖南长沙 410082

出版日期:2013-12-25 发布日期:2017-07-05
基金资助:
国家自然科学基金资助项目;国家高技术研究发展计划(“863”计划)基金资助项目;湖南省自然科学基金资助项目

Experimental research on a direct-detection optical OFDM system based on cascaded variable coefficient training sequences and pre-emphasis technique

Wei WU^1,²,Jiang-nan XIAO^1,²,Ming CHEN^1,²,Jian-jun YU^1,²,Lin CHEN^1,²

¹ School of Information Science and Engineering, Hunan University, Changsha 410082, China
² Key Laboratory of Micro/Nano Optoelectronic Devices of Ministry of Education, Hunan University, Chan ha 410082, China

Online:2013-12-25 Published:2017-07-05
Supported by:
The National Natural Science Foundation of China;The High Technology Research and Development Program of China(863 Program);The Natural Science Foundation of Hunan Province

摘要/Abstract

摘要：

分析了直接检测光OFDM(DDO-OFDM)传输系统中由数模转换器和光纤链路中的光纤色散所致的OFDM信号高频衰减现象，以及经光纤传输后在光电检测时存在的子载波间互拍干扰现象。提出使用级联变系数训练序列和预增强结构的光 OFDM(O-OFDM)信号来降低传输系统所受到的影响。理论分析和实验验证表明，级联变系数训练序列和预增强结构的基带OFDM信号在DDO-OFDM传输系统中，接收灵敏度比常规的交叉型训练序列结构的OFDM信号要高。说明基于级联变系数训练序列和预增强结构的O-OFDM信号的传输性能在抵抗子载波间互拍干扰(SSMI)和频率选择性衰减(FF)方面要优于常规的交叉型训练序列结构的O-OFDM信号。

关键词: 光正交频分复用, 变系数训练序列, 预增强, 子载波间互拍干扰, 频率选择性衰减, 光传输

Abstract:

Frequency selective fading (FF)caused by digital to analog converter and optical fibe dispersion in optical fiber link was analysed,and signal-signal mixing interference (SSMI) when the orthogonal frequency division multiplex-ing (OFDM) signal was detected by PIN after transmitting over the fiber in direct-detection optical OFDM system.The cascaded variable coefficient training sequences and pre-emphasized configuration of O-OFDM signal were proposed to decrease the influence of the SSMI and FF.The theoretical analysis and experimental results show that the receiving sen-sitivity of the cascaded variable coefficient training sequences and pre-emphasized configuration of OFDM signal is higher than the interleaved configuration of training ed that the fiber transmission performance of the cascaded variable coefficient training sequences and pre-emphasized configuration of O-OFDM signal is better than the interleaved configuration of training sequence of OFDM signal in ro-bust tolerance against SSMI and FF.

Key words: optical orthogonal frequency division multiplexing(O-OFDM), variable coefficient training sequence, pre-emphasis technique, subcarrier-subcarrier mixing interference(SSMI), frequency selective fading(FF), optical trans-mission

吴巍,肖江南,陈明,余建军,陈林. 基于级联变系数训练序列和预增强技术的直接检测光OFDM系统实验研究[J]. 通信学报, 2013, 34(12): 149-157.

Wei WU,Jiang-nan XIAO,Ming CHEN,Jian-jun YU,Lin CHEN. Experimental research on a direct-detection optical OFDM system based on cascaded variable coefficient training sequences and pre-emphasis technique[J]. Journal on Communications, 2013, 34(12): 149-157.

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基于级联变系数训练序列和预增强技术的直接检测光OFDM系统实验研究

Experimental research on a direct-detection optical OFDM system based on cascaded variable coefficient training sequences and pre-emphasis technique

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