Bidirectional ROF Links Using Optically Up-Converted DPSK for Downstream and Remodulated OOK for Upstream
Bidirectional ROF Links Using Optically Up-Converted DPSK for Downstream and Remodulated OOK for Upstream
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DOI：
10.1109/lpt.2007.894961
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发表时间：
2007-05
影响因子：
2.6
通讯作者：
Z. Jia;Jianjun Yu;D. Boivin;M. Haris;G. Chang
中科院分区：
文献类型：
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作者：
Z. Jia;Jianjun Yu;D. Boivin;M. Haris;G. Chang
我们提出了一种新的光纤无线电系统，通过在中心站使用光差分相移键控调制格式进行下游，在基站（BS）上使用下行载波的开关键控调制格式进行上游，从而提供全双工服务。采用光载波抑制调制方案同时产生和上转换40 ghz光毫米波。由于上行链路和下行链路使用相同的光载波，因此在BS上不需要额外的光源，从而大大降低了成本，简化了整个系统。仿真和实验结果表明，在40 km单模光纤（SMF-28）上成功传输双向2.5 gb /s数据，功率损失小于2 db
We propose a novel radio-over-fiber system to provide full-duplex services by using optical differential phase-shift keying modulation format at the central station for downstream and on-off keying remodulation of the downlink carrier at the base station (BS) for upstream. The optical carrier suppression modulation scheme is employed to simultaneously generate and up-convert 40-GHz optical millimeter wave. As the same optical carrier is used for both uplink and downlink, no additional light source is required at the BS, which greatly reduces the cost and simplifies the overall system. Simulations and experimental results show that the bidirectional 2.5-Gb/s data is successfully transmitted over 40-km single-mode fiber (SMF-28) with less than 2-dB power penalty