激光技术2011，Vol.35Issue(1)：112-116,121,6.DOI:10.3969/j.issn.1001-3806.2011.01.031
光纤OFDM系统中的色散补偿技术研究
Research on dispersion compensation for OFDM signal fiber transmission
摘要
Abstract
In order to reduce the impact of fiber chromatic dispersion on the transmission performance of an orthogonal frequency division multiplexing ( OFDM ) system, a channel estimator was introduced into the system.The influence of fiber chromatic dispersion on OFDM signals transmission in optical fiber was theoretically investigated.And the performance of an OFDM system with a channel estimator based on combined pilots and the least square estimation was demonstrated in the experiment.The amplitude response and phase response for the OFDM system showed that the optical OFDM signal modulated by a direct modulator can transmit 200km in the single-mode dispersion fiber.The bit error rate was less than 10-6 and the power penalty was smaller than 2dB.The results show that fiber chromatic dispersion plays a stronger impact on high frequency subcarrier than low frequency subcarrier.The proposed method can effectively compensate the phase shift and amplitude attenuation caused by fiber chromatic dispersion.关键词
光通信/正交频分复用/色散补偿/信道估计Key words
optical communication/ orthogonal frequency division multiplexing/ dispersion compensation/ channel estimation分类
信息技术与安全科学引用本文复制引用
范哲,温广倩,周慧,肖江南,陈林..光纤OFDM系统中的色散补偿技术研究[J].激光技术,2011,35(1):112-116,121,6.基金项目
国家八六三高技术研究发展计划资助项目(2007AA01Z263) （2007AA01Z263）
湖南省自然科学基金资助项目(06JJ50108) （06JJ50108）
教育部光通信和光波技术重点实验室(北京邮电大学)开放基金资助项目 （北京邮电大学）
