Radio-over-Fiber (RoF) technology has been developed since the late 20th century and has been used efficiently in a range of applications for communication system. RoF system refers to the radio signals which are modulated with optical signal and transmitted over optical fiber link from Central Office (CO) to the Remote Nodes (RNs). In this work, several RoF systems have been designed and simulated. These systems were compared with each other to check for better performance. These systems are presented as follows: The first system is RoF with Quadrature Phase Shift Keying (QPSK),...