Lin Chun-Ting, Lin Yu-Min, Chen Jason Jyehong, Dai Sheng-Peng, Shih Po Tsung, Peng Peng-Chun, Chi Sien
Department of photonics and institute of electro-optical engineering, National Chiao-Tung University Hsinchu 300, Taiwan.
Opt Express. 2008 Apr 28;16(9):6056-63. doi: 10.1364/oe.16.006056.
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.
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。
