Design analysis and performance evaluation of the WDM integration with CO-OFDM system for radio over fiber System

Abstract

<span>The optical communication and wireless networks can be integrated to increase the capacity and mobility with decrease the costs in the access networks. Optical communication is considered a Fiber optic communication that can be used for wired and wireless communication. The problems of Fiber optic communication have a solution represented by Radio over fiber (RoF) which can control many base stations (BSs) that connect to a central station (CS) with an optical fiber. The Coherent optical OFDM (CO-OFDM) have concerned a great interest due to the high spectral efficiency and strength to the fiber dispersion, also it can be considered as a promising candidate when used in long haul optical fiber transmission systems. The integration of the wavelength division multiplexing system (WDM) with (CO-OFDM) system for increasing the system performance as well as achieving high data rates. The simulation of WDM-ROF and (WDM-CO-OFDM) with an optisystem simulator to analyze the RF spectrum, spectrum signal visualizers, and constellation diagrams. The proposed of integration of WDM and RoF-OFDM system is to achieve 100 km fiber length using 4QAM sequence bit, and the received power with electrical and optical amplifications by using 10 Gbps data signal.</span>

An efficient 110 x 8 GHz WDM RoF System design for 5G & advance wireless networks

“…Wavelength Division Multiplexing (WDM) helps the link achieve high transmission capacity with high data rate with relatively low cost and flexibility to scale the network [12]. Using WDM, the system can also be made bidirectional for transmission between transmitter and receiver over a single optical fiber.…”

“…OFDM can be labeled as a multicarrier modulation that data information is managed by various low-level carriers. OFDM's two main advantages can be realized, namely its durability in channel dispersion and its simplicity of channel and phase alignment in a flexible environment [12]. A 25 Gb/s 60 GHz OFDM RoF system based on mm-wave generation using Fabry-Perot Laser Diode (FPLD) as described and modeled in [22] shows the impact of signal interference is very low.…”

“…RoF comprises of Base Station(s) (BS) [9], Central Station(s) (CS) and optical fiber. CS comprises of transmitters, receivers, modulators and other optical devices, CS is responsible for the downlink and uplink transmission of Radio Frequency (RF) signals to the BS via optical fibers and antenna which transmits them to the end users (receiver) [10][11][12]. The transmission is made via RF signal or intermediate frequency signals.…”

Design and Performance Investigation of Intensity Modulation/Direct Detection Scheme for C- and O-band Point-to-Multipoint Optical Networks

“…Over the last years, the request for high-capacity networks has increased to support multiple deployment of broadband connectivity [1][2][3]. This is a growing landscape, that is now being addressed by the realization of fresher technologies such as fifth generation (5G) and beyond, which present access to user in higher than gigabit speeds [4][5][6][7][8].…”

Highly Accurate Technique for CO-OFDM Channel Estimation Technique Using Extreme Learning Machine (ELM)

“…Over the past few decades, global network traffic has grown explosively due to the demands for higher bandwidth and faster connections of various multimedia and data services (e.g. big data, cloud computing, streaming video, Internet of Things, machine-to-machine communication, and remote surgery), [1]. Conventional cable-based transmission approaches cannot meet the enormous data transmission requirements.…”