Analysis and Performance Enhancement of Radio Over Fiber Link System

Abstract

Radio over fiber is an objectively ideal technology for the integration of wired and wireless networks as it combines best attributes of two common communication methodologies. It offers mobility to the end-users in terms of to be free from the restrictions of a physical link to a network which is a negative of conventional fiber optic networks. It also offers abundant bandwidth which satisfies customer needs for the use of bandwidth hungry applications, where the bandwidth provided by wireless networks could be a substantial bottleneck [63]. ROF link based systems offer advantages like rapid and cost effective deployment of micro or pico cellular architectures in their wireless networks and its usability in dynamic environments due to its centralized processing and adaptive radio environment. It also chains propagation of several RF subcarriers simultaneously due to abundant bandwidth of optical fiber networks. Lower cost ROF elements with enhanced working performance are due to the recent maturity in microwave photonic technology. In addition, further reduction in deployment cost of such systems also possible due to use of existing dim or partly used optical fibers already deployed in urban areas along with its roads and railway tracks. It in turn helps to bring down CAPEX of such systems [63], [64]. newlineSeveral identified research priorities should be attended in order to improve capabilities, robustness and cost effectiveness of such RoF based networks. The requirement of applications such as rich multimedia, HDTV data and etc; with low power and low cost are fundamental reasons behind the integration of wireless and wired domains using RoF based system. It is because it offers high data rate transmission with low power consumption at lower cost. The integration aims to make the networks more transparent, dynamic, faster and greener [63]. Literature survey noticed that ever-increasing need of huge bandwidth for bandwidth hungry applications like live streaming of data, transfer of high definition photos-videos,