【摘要】 文章对两种双频率波段的光纤无线通信(Radio-Over-Fiber,ROF)系统模型进行了仿真分析。首先基于文献实验,实现了使用一个马赫-曾德调制器直接调制双频率波段的ROF系统模型,然后改为使用两个马赫-曾德调制器分别调制两个波段的系统模型。结果表明,在误码率BER=10-9,光纤长度为55 km的情况下,对于40 GHz频段,改进后的系统比改进前的系统性能提高5 dBm;从敏感度曲线上也可以看出,改进后的系统性能更稳定。更多还原

【Abstract】 In this paper,two kinds of double-frequency Radio over Fiber(RoF) system models are simulated.On the basis of experiments,a RoF system model,whose double-frequency waveband is directly modulated by a Mach-Zehnder modulator,is realized.Then,it is improved into a system model,whose two wavebands are modulated with two Mach-Zehnder modulators respectively.The results show that when BER=10-9 and the fiber length is 55 km,the improved system is 5 dBm better at the 40 GHz frequency band and more stable in terms of sensitivity than the former.更多还原