Research On The Key Technology Of Millimeter Wave Radio Over Fiber Transmission

With the improvement of information process for human society, on the one hand the multimedia broadband services needed for people are in demand increasingly; on the other hand the currently congested microwave band of wireless communications can't meet the needs to such various businesses. Therefore, extending the frequency band is in great demand for wireless communications to solve the contradiction between them, among which millimeter-wave frequencies can satisfy the needs of high-speed data transmission for wireless communications and optical fiber is of a variety of frequency resources and great anti-interference ability, and the integration of millimeter-wave and optical fiber transmission technologies is becoming the research focus. The Radio Over Fiber (ROF) system fully combining the advantages of optical fiber with wireless communications system can not only improve capacity, coverage and mobility, but also can provide more business for fixed and mobile terminal users.The generation and transmission technology of millimeter-wave and base station simplified technology are the key technologies for millimeter-wave ROF system, and this paper mainly focus on these two aspects to spread around:Firstly, the features and applications of millimeter-wave and ROF communications are briefly introduced. Secondly, millimeter-wave generation and transmission technologies are depicted in detail with the illustrated principles of these technologies, the advantages and disadvantages of these technologies are compared and the applicable scope of these technologies respectively. Further, we focus on the design and analysis of several millimeter-wave generation schemes including phase modulation millimeter wave generation technique, parallel modulation structure millimeter wave generation technology and integrated optical modulation technology. The feasibility of these solutions is verifed through combining theory and simulation, ROF downlink system is constructed, numerical analysis on effect of dispersion on integrated optical modulation technology is fulfilled. Lastly, the base station simplified technology is innovatively studied to propose a 60GHz-ROF full-duplex communication system based on the parallel modulation structure millimeter-wave generation technique and the integrated optical modulation technology. Comparing with the existing technology scheme on transmission performance through simulation and performance testing, the result has shown that the system gets an obvius advantage in transmission power, transmission distance, dispersion tolerance and system cost.