Li C, Huang X et al (2020) A WDM PAM4 FSOвЂ“UWOC integrated system with a channel capacity of 100 Gb/s. Konstantinou D, Bressner T et al (2020) 5G RAN architecture based on analog radio-over-fiber front haul over UDWDM-PON and phased array fed reflector antennas. Kanno A, Dat PT et al (2018b) High-speed and uninterrupted communication for high-speed trains by ultrafast WDM fiberвЂ“wireless backhaul system. Kanno A, Dat PT et al (2018a) Millimeter-wave radio-over-fiber network for linear cell systems. Hussein A et al (2019) Design analysis and performance evaluation of the WDM integration with CO-OFDM system for radio over fiber system. Gujral J, Singh M (2013) Performance analysis of 4-channel WDM system with and without EDFA. Д«ergano NS, Kerfoot F et al (1993) Margin measurements in optical amplifier systems. Д«eas J, Castanon G, Aldaya I, Aragon-Zavala A, Campuzano G (2013) Millimeter-wave frequency radio over fiber systems: a survey. ДЄlishahi F et al (2019) Optical mitigation of interchannel crosstalk for multiple spectrally verlapped 20-GBd QPSK/16-QAM WDM channels using nonlinear wave mixing. The proposed method is simulated and analyzed using the Optisystem 13 tool.ДЄli A, Farhood A (2019) Design and performance analysis of the WDM schemes for radio over fiber system with different fiber propagation losses. The results show that the proposed scheme at 100В GHz performs far better than the similar systems operating at 60В GHz. The perceived values of BER at 70В km of optical fiber length are 3.153eв€’9, 1.48eв€’8, 2.42eв€’10 and 2.1546eв€’9 and Q factor are 5.81В dB, 5.54В dB, 6.22В dB and 5.87В dB for the four channels respectively. The system performance is evaluated using various performance indices like eye diagram, Q factor, SNR, and BER. The proposed system uses a WDM scheme to multiplex the fourВ channels, and the data is transmitted over a single-mode optical fiber of length from 30 to 70В km. The proposed system consists of 4-channels WDM-RoF using a data rate of 10В Gbps and aВ carrier of 100В GHz. The paper reports the design and analysis of a system to achieve a high data rate with a minimum BER for long haul communication. At long distances, if the data rate increases, BER will also increase. The 5G communication demands a high data rate with a minimum BER. It has an extensive range of applications that require wide bandwidth and high-speed data rates. The present decade is an era of the 5G and beyond communication.

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