采用带载波抑制的倍频方案实现用于光纤无线链路的光直接检测正交频分复用（OFDM）信号生成

Optical direct-detection OFDM signal generation for radio-over-fiber link using frequency doubling scheme with carrier suppression.

作者信息

Lin Chun-Ting, Lin Yu-Min, Chen Jason Jyehong, Dai Sheng-Peng, Shih Po Tsung, Peng Peng-Chun, Chi Sien

机构信息

Department of photonics and institute of electro-optical engineering, National Chiao-Tung University Hsinchu 300, Taiwan.

出版信息

Opt Express. 2008 Apr 28;16(9):6056-63. doi: 10.1364/oe.16.006056.

DOI:10.1364/oe.16.006056

PMID:18545307

Abstract

This investigation demonstrates the generation of OFDM-RoF signal using frequency doubling technique for the first time, to the author's best knowledge. The 4-Gb/s OFDM signal using 16-QAM format modulated on each subcarrier at a center frequency of 19GHz is experimentally demonstrated. Benchmarked against the OOK format, the 16-QAM OFDM format has the higher spectral efficiency with a sensitivity penalty of less than 2.6 dB. After transmission over 50-km single mode fiber, the power penalties of RF OOK and OFDM signals are less than 0.5 dB.

摘要

据作者所知，本研究首次展示了利用倍频技术产生正交频分复用-射频光纤（OFDM-RoF）信号。实验证明了在19GHz中心频率下，每个子载波采用16正交幅度调制（16-QAM）格式的4Gb/s OFDM信号。与开关键控（OOK）格式相比，16-QAM OFDM格式具有更高的频谱效率，灵敏度损失小于2.6dB。在50公里单模光纤上传输后，射频OOK和OFDM信号的功率损失小于0.5dB。