An optical access scheme with 1.25Gbit/s NRZ downstream signals over 6GHz subcarrier for next generation mobile systems application

Abstract

In order to solve the problem of network frequency resource congestion from the central office (CS) to the base station (BS) in sixth generation (6G) mobile communication systems, we design a passive optical network (PON) access scheme. 1.25Gbit/s non-return-to-zero (NRZ) downstream signals over 6GHz subcarrier are successfully transmitted in the 20km single-mode fiber (SMF) and allocated to 4 optical network units (ONUs). The radio frequency (RF) spectrums, optical spectrums, eye-diagrams and bit error rate (BER) before and after transmission of NRZ signals in the system were measured and analysed. The results show that, this scheme can provide high-speed, stable and secure data communication.

Detection of high spectral efficiency 16/32QAM-OFDMA downlink signals using self mixing method and its application in PON

“…Recently, due to the emergence of many novel application scenarios such as virtual/augmented reality (VR/AR), artificial intelligence (AI), big data and cloud computing, there is an urgent need for higher-capacity access networks to meet people 's demand for communication bandwidth. High speed transmission, large bandwidth and flexible access has become the target direction of telecommunication's access system development [1,2]. The traditional passive optical network (PON) systems, such as Ethernet PON (EPON) and Gigabit PON (GPON) include the use of time division multiplexing (TDM) or wavelength division multiplexing (WDM) techniques, have certain limitations in bandwidth management, flexibility and scalability, and cannot meet the requirements of future network operators and end users [3,4].…”