计算机应用 ›› 2012, Vol. 32 ›› Issue (05): 1217-1220.

• 网络与通信 • 上一篇    下一篇

基于相位调制器的光载OFDM信号产生和传输系统

景琴琴,文鸿,徐亮,彭生奇   

  1. 湖南工业大学 计算机与通信学院,湖南 株洲 412008
  • 收稿日期:2011-10-24 修回日期:2011-12-10 发布日期:2012-05-01 出版日期:2012-05-01
  • 通讯作者: 文鸿
  • 作者简介:景琴琴(1985-),女,甘肃平凉人,硕士研究生,主要研究方向:新一代宽带光纤无线通信;
    文鸿(1981-),男,湖南邵阳人,副教授,博士,主要研究方向:新一代宽带无线网络;
    徐亮(1985-),男,陕西渭南人,硕士研究生,主要研究方向:无线自组网;
    彭生奇(1988-),男,湖南常德人,硕士研究生,主要研究方向:无线传感网。
  • 基金资助:

    湖南省自然科学基金资助项目(11JJ3002);湖南省教育厅项目(11C0424,11C0403);湖南省研究生科研创新项目(CX2011B393)

Generation and transmission system of optical millimeter-wave carrying OFDM signal based on phase modulator

JING Qin-qin,WEN Hong,XU Liang,PENG Sheng-qi   

  1. School of Computer and Communication, Hunan University of Technology,Zhuzhou Hunan 412008,China
  • Received:2011-10-24 Revised:2011-12-10 Online:2012-05-01 Published:2012-05-01
  • Contact: WEN Hong

摘要: 光正交频分复用(OOFDM)是目前宽带通信领域的研究热点,它和光纤无线通信(ROF)系统相结合可以更好地克服色散,提高ROF系统的性能。提出一种基于相位调制器的光载OFDM信号产生和传输系统。在中心站采用相位调制器结合光滤波器产生载波抑制-双边带(DSB-SC)光载毫米波,将OFDM信号调制到一个边带上进行传输。建立了光载OFDM信号的产生模型,分析了光纤色散导致的相位影响,并通过仿真实验验证了系统的可行性。结果表明,经95km光纤传输后,系统的眼图仍清晰张开。

关键词: 光通信, 正交频分复用, 相位调制器, 光纤色散

Abstract: OOFDM (Orthogonal Frequency Division Multiplexing) is a focus in research of broadband communications now. The combination of OFDM with ROF (Radio Over Fiber) system can overcome optical dispersion and improve the performance of ROF system。 A generation and transmission system of optical millimeter-wave carrying OFDM signal based on phase modulator was proposed. In the center station, Double SideBand with Suppressed Carrier (DSB-SC) optical millimeter wave signal was generated utilizing phase modulator along with optical filter, while OFDM signal was modulated only onto one of the two optical carriers and transported along optical fiber. The paper set a model about optical carrier OFDM generation and analyzed fiber dispersion influence on phase, and proved the feasibility of the system through the simulation test. The result show the system's eye chart is very clear over 95km optical fiber.

Key words: Optical communication, Orthogonal Frequency Division Multiplexing, Phase modulator, Fiber Dispersion

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