摘要
文章提出一种使用单一信道加载不同传输速率业务的光载无线系统方案。使用外调制器实现双边带调制,利用光栅滤波器分离左右边带和载波,经过强度调制对左右边带分别加载速率为1.25和1.5Gbit/s的两种业务。仿真结果显示,信号经过50km的光纤传输后,系统传输性能良好。该方案提高了单一信道的带宽利用率,增强了系统的灵活性。
This paper presents a novel Radio-over-Fiber（ROF） system scheme for carrying services with different transmission rates in a single channel.Double sideband modulation is realized by using external modulators and the sidebands and carrier are separated by grating filters.The two sidebands carry two kinds of services with different rates of 1.25 and 1.5 Gbit/s respectively in intensity modulation.Simulation results show that the system performances are good after the signals are transmitted for 50 km in an optical fiber.This scheme can improve the bandwidth utilization ratio of single channels and enhance the system flexibility.
出处
《光通信研究》
北大核心
2011年第6期60-62,共3页
Study on Optical Communications
基金
重庆市自然科学基金资助项目(CSTC2010BB2414)
关键词
光载无线系统
外调制
多业务
radio-over-fiber system
external modulation
multi-service
