A 1.792 Tbps RoF-based PDM-DQPSK DWDM system for high-capacity long-haul 5 G and beyond optical network

Abstract

This article proposes a high-capacity, cost-effective, and reliable transceiver system for 5 G and beyond optical communication. The system uses differential quadrature phase-shift keying (DQPSK), carrier-suppressed non-return-to-zero (CSNRZ) modulation, duobinary coding, radio over fiber (RoF), and dense wavelength division multiplexing (DWDM) techniques to improve the system's efficiency. The RoF technology has been implemented using a 3.5 GHz radio frequency in compliance with 3GPP, IEEE, and ITU standards for 5 G communication. The performance of the proposed system has been analyzed using numerical methods in terms of constellation diagram, eye diagram, bit error rate (BER), optical signal-to-noise ratio (OSNR) requirement, and receiver sensitivity. 1.792 Tbps maximum data rate has been achieved in the simulation analysis using the 64-channel DWDM technique. Erbium-doped fiber amplifier (EDFA) compensates for signal attenuation, and dispersion compensating fiber (DCF) compensates for dispersion in a multi-span transmission link. The maximum transmission distance has been extended up to 1600 km at a BER of 10−12. The proposed system shall support high transfer rates and reliable connectivity requirements of 5 G and beyond networks.