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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 optical method to generate UWB signals is proposed and validated. The UWB signals generated by optical method are directly transmitted through the optical fiber at the transmitting end and the UWB signals are correlated at the receiving end. Meanwhile, Complete the user information and data information of the decision. System has a simple expansion, easy to receive, remote transmission, tunability and so on. Design and manufacture of multi-channel fiber grating filter and dispersion fiber made up of the frequency discriminator is the core of the system components. The transmitted signal uses different chip combination to distinguish each user, the system only needs to adjust the laser wavelength to realize the user switchover, produces the UWB signal of different user’s photogenerated and restores the information of different users, has realized the multi-user communication entire process .