基于ROF系统六倍频毫米波生成技术的研究  

Research of Six-frequency Multiplication Technology Based on ROF System

作　　者：蒋祥鹏 武向农[1] 徐冠[1] 

机构地区：[1]上海师范大学信息与机电工程学院,上海200234

出　　处：《科技通报》2016年第2期154-157,162,共5页Bulletin of Science and Technology

基　　金：上海市自然科学基金项目(13ZR1430400);上海市教育委员会科研创新项目资助(14YZ070)

摘　　要：在ROF传输系统中,基于相位调制器PM提出了一种六倍频毫米波的产生方法。在中心基站将10 GHz的射频信号通过相位偏置器作用在两个并联的相位调制器中,使两个相位调制的初始相位差为,通过对两个相位调制器的调相指数M的调节,能够产生一阶边带和二阶边带均被抑制的毫米波信号。中心载波是通过高斯滤波器的带阻性质滤除,在接收端通过PIN的拍频作用就得到了六倍频60 GHz毫米波信号。基于此六倍频毫米波产生模块搭建2.5 Gbit/s的双向ROF传输系统,对该毫米波的在系统中的传输特性做出了理论分析和仿真验证。从测得误码率曲线可以得到:上行和下行链路信号在光纤中传输30 km后功率损耗均小于1.5 d Bm,这证明了该六倍频毫米波信号能够很好地克服光纤色散的影响,从而验证了方案的可行性。In the ROF transmission system, the article puts forward a method for generating a six-octave millimeter wave on the basis of phase modulators PM. At the center Base Station, the method is putting 10 GHz of RF signal through the phase offset effect into two parallel phase modulators, then it makes phase difference between the initial phase of two phase modulation to be . By changing the Index M of phase modulation of two phase modulators, it can generate a millimeter wave which the first side band and the second side are suppressed. With Gaussian filter, we can filter out rejection properties of center carrier, then obtain a six-octave millimeter wave through beat frequency from PIN. On the basis of six-octave millimeter wave generation module, we build a 2.5 Gbit/ s bidirectional ROF transmission system. In this system, we make a theoretical analysis and simulation about transmission characteristic of this system. According to the measured BER curves, some results can be obtained: the power losses in the 30km optical fiber of the uplink and downlink signal transmission are both less than 1.5dBm, which proves that the six-octave millimeter wave can well overcome the impact of fiber chromatic dispersion, and proves the feasibility of the program.

关 键 词：光相位调制器 六倍频 双向ROF系统 误码率 

分 类 号：TN919.3[电子电信—通信与信息系统]