基于光生编码超宽带信号的多用户通信系统  

Multi-User Communication System Based on Photonic Generation of Coded Ultrawideband Signal

作　　者：刘双[1] 钱祖平[1] 王荣[1] 蒲涛[1] 

机构地区：[1]中国人民解放军理工大学通信工程学院,江苏南京210007

出　　处：《光学学报》2014年第7期41-45,共5页Acta Optica Sinica

基　　金：国家自然科学基金(61032005;61371121;61177065);国家973计划(2012CB315603)

摘　　要：提出并验证了一种基于光学方法产生编码超宽带(UWB)信号的多用户通信系统,在发射端通过光纤直接传输用光学方法生成的UWB信号,在接收端对编码UWB信号进行相关运算,同时完成用户信息和数据信息的判决。系统具有简单扩容、易于接收、远距传输、可调谐性等优点。设计制作的多信道光纤光栅滤波器和色散光纤组合成的鉴频器是系统的核心器件。传输的信号用不同的码片组合来区分各个用户,系统只需调节激光波长来实现用户切换,产生了不同用户的光生编码UWB信号,并恢复出不同用户的信息,实现了多用户通信全过程。A multi-user communication system based on photonic generation of coded ultrawideband （UWB） signal is proposed and demonstrated. The optical fiber is used for the transmission of the coded UWB signal generated by an optical method at the transmitter. The receiver calculates the cross correlation of the coded UWB signals and the signature codes to get the user information and data information. The proposed system has advantages such as simple expansion, easy receiving, long distance transmission, and tunability. The core component in the system is the optical frequency discriminator combined by multi-channel fiber Bragg grating （FBG） filter and dispersion fiber. Different chip-combinations in the signals represent different users. It needs only to tune the wavelength of the lasers for user-switching in this system. The coded UWB signals for different users are experimentally generated, and the user information and data information are recovered correctly. The proposed system realizes the whole communication process.

关 键 词：光通信 微波光子学 编码超宽带信号 光纤布拉格光栅 多用户通信 

分 类 号：TN929.11[电子电信—通信与信息系统]