Design and Analysis of Radio Over Fiber for Fronthaul Connection of High-Speed C-RAN

• Published in: 2023 8th International Scientific Conference on Applying New Technology in Green Buildings (ATiGB) pp. 298 - 303
• Main Authors: Dao, Vu Anh, Thuy, Tran Thi Thanh, Vu, Tran Hoang, Quyen, Nguyen Xuan, Hung, Nguyen Tan, Dung, Truong Cao
• Format: Conference Proceeding
• Language: English
• Published: IEEE 10.11.2023
• Subjects: Bit error rate; bit error rate (BER); Cloud radio access network (C-RAN); Differential phase shift keying; eye diagram; Numerical simulation; Optical fiber networks; Optical fibers; Optical transmitters; quality factor (Q-factor); radio over fiber (RoF); Radio transmitters
• DOI: 10.1109/ATiGB59969.2023.10364512

Radio over Fiber (RoF) is an exotic technology for next-generation wireless networks, including fifth-generation Cloud-Radio Access Networks (C-RAN). In this paper, we propose a fronthaul interface, demonstrated through numerical simulations, for two wireless signal channels in the VHF frequency band using DPSK and CPFSK modulation schemes without needing to use forward error correction coding over a standard single-mode optical fiber span of 20 km. The proposed method is capable of efficiently supporting a high bandwidth of the optical fiber link up to 2.8 Gbps while maintaining a bit error rate (BER) less than 10 −9 . Performance analysises have been demonstrated by the numerical simulation for the proposed digital RoF technique. Notably, the performance evaluation of two channels with two advanced digital modulation methods is reported through the analysis of quality parameters, including eye diagrams and signal-to-noise ratio. It is indicated that digital optical links can support long-distance transmission of over 20 km with low-level power laser transmitters without the need for the dispersion compensation process, meeting the requirements of wideband C-RAN systems.