Evaluation of the Digital Data Performance Transmission of a Two-User Fiber-Radio System with NOMA Wireless Access Scheme

This paper presents a set of simulations to evaluate the digital data transmission performance of a two-user Fiber-Radio system that shares the same optical and wireless link. For this purpose, at the optical stage, the Optisystem software 21.1.0 is used to simulate the transmission of two digital signals at a bit rate of 2.4 Gbps through a 100 m single-mode standard fiber (SM-SF). To implement the use of a single optical link for two users, the Wavelength Division Multiplexing (WDM) technique is used. Subsequently, the wireless stage is evaluated in MATLAB R2023a by using the NOMA scheme, and the wireless transmission and data recovery are shown and explained in detail. In the wireless stage, four factors that affect the transmitted signal are considered: noise, two types of fading, and Co-channel interference. Performance of the wireless system is evaluated using statistical tests. The simulation set has potential applications in the performance evaluation of Fiber-Radio systems for outdoor environments due to their satisfactory operation at distances of up to 500 m from the transmitting station. Furthermore, the proposed system could be applied to cellular telephony, the Internet of Things (IoT), and sensor signal transmissions for industrial or agricultural uses.