A REVIEW ON RADIO OVER FIBER SYSTEMS FOR LONG DISTANCE COMMUNICATION

الملخص

It is well-known that the Wireless Communication cannot provide long distances, Because the radio signals have a limited bandwidth and are susceptible to atmospheric noise and distortion. Recently, optical fiber communication played a significant role in the communication systems, where it is stated as one of the best transmission technique in the modern telecommunication systems since it transmits the signal for longer distances with lower loss and higher quality. As result, to provide the recipient of the radio signals with a high quality for long distances, the traditional cables are replaced by optical fiber link and an advanced optical fiber technology known as Radio over Fiber (RoF) can be utilized faithfully. RoF is a technology that modulates the light signal by radio signal and transmit it across a fiber optic link to extend the transmission and wireless access. Currently, this technology has become matured technology in terms of coverage, security and reliability. The RoF system has been implemented for the enhanced performance radio system having larger bandwidth for mobile communications. In addition, these systems have various advantages over traditional systems including higher bandwidth, easy Installation and Maintenance, lower attenuation, dynamic resource allocation, immunity against the RF interference and can transfer high frequency signals that support 5G and beyond 5G network technologies. This paper provides a comprehensive review on the currently existing RoF systems for long distance communication to provide the reader with the techniques used for delivering the radio signals for the longest distance with minimum Bit-Error-rate (BER) and highest Quality Factor (QF)