摘要
设计和仿真实现了在单信道中同时传输多种无线业务的光载无线系统,使用外调制器获得双边带调制方式的光毫米波信号,利用光纤布拉格光栅进行左右边带和载波的分离,通过选择边带和载波进行强度调制不同速率业务的信号来获得不同的系统方案。仿真结果显示,各个信号在光纤中传输50 km后,最大功率代价小于1 dB。证明了单信道多业务光载无线系统可以提高单一信道带宽的利用率,增加系统的灵活性。
A single channel multi-services Radio Over Fiber （ROF） system is designed and simulated. The systems produce double sideband optical millimeter-wave signal by using external modulator, and separate the two sidebands and optical carrier by using FBG. The system can realize different schemes by choosing sidebands or optical carrier to carry the different rates of signals with intensity modulator. The simulation result shows that the maxi- mum power pena｜ty of each signal is less than I dB after transmit for 50 km in fiber. It is demonstrated that the sing｜e channel multi-services ROF system can enhance the utilization ratio of single channel, and increase the flexibility and configurability of the system.
出处
《电视技术》
北大核心
2012年第5期77-79,共3页
Video Engineering
基金
重庆市自然科学基金项目(CSTC2010BB2414)
关键词
光载无线系统
外调制
单信道
多业务接入
radio-over-fiber system
external modulation
single channel
multi-services
