一种改进的基于相位调制器产生毫米波的单边带调制ROF系统  

A Modified SSB Full-duplex ROF System Optical Millimeter Wave Generation Utilizing Optical Phase Modulator

作　　者：贾楠[1] 李晶[1] 陈新桥[1] 

机构地区：[1]中国传媒大学信息工程学院,北京100024

出　　处：《中国传媒大学学报（自然科学版）》2008年第2期29-34,共6页Journal of Communication University of China：Science and Technology

基　　金：中国传媒大学亚洲传媒基金(AM0521)

摘　　要：本文利用单边带调制技术和光相位调制器,设计了一种改进的毫米波光纤传输系统。在中心站采用光相位调制器并结合滤波的方法产生频差为毫米波的载波抑制双边带光信号,利用滤波器将上、下边带光信号分离,分别用作下行链路和上行链路的光载波,上、下行的数据信号均采用单边带调制技术调制到光载波上。分析了系统光纤传输色散,进行了系统的数据传输仿真实验。分析和仿真结果表明,该系统能有效的降低光纤色散对毫米波信号的衰落。同时该系统具有中心站和基站的配置简单,性能稳定,节省了频带资源等优点。A modified ROF system optical millimeter- wave generation utilizing optical phase modulator and single sideband modulation is proposed. In the central station, Carrier suppression double sideband optical signal with millimeter - wave is generated by using an optical phase modulator along with filtering technique. The modulated up and down optical signals is separated by using filters which is used as carrier for modulating the up and down link data. The chronic of fiber is analyzed and the simulation experiments have been down. The simulation experiments show that center ＆ base station don＇ t need any coherent laser source or microwave source with this method. By using single band modulation in both center ＆ base stations the fiber dispersion effect will be reduced greatly; frequency bands were saved a lot at the same time.

关 键 词：光纤无线电 相位调制器 光外差 单边带调制 光纤色散 

分 类 号：TN929.11[电子电信—通信与信息系统]