Performance Investigation of a High Data Rate Mode Division Multiplexed-Free Space Optics Link Under Harsh Weather Conditions

Abstract

The requirement of high data rate information transmission is rising exponentially for supporting different services including social networking, web streaming, and biomedical sensor data transmission. Such services required high channel bandwidth with secure information transmission and immunity to electromagnetic interference. Radio over free space optics (RoFSO) is witnessed as a promising technological solution to provide high data rate transmission over free space channel. We report on the design of a 2×10 Gb/s-10 GHz RoFSO transmission system using the mode division multiplexing technique and evaluate its transmission performance over varying levels of dust weather conditions. The comparison of non-return to zero (NRZ) and return to zero (RZ) binary digital optical modulation techniques is carried out in the proposed system. It is found that the proposed system using NRZ modulation serves 14.5 km transmission range; however, in the case of RZ modulation, it was restricted to 10 km for a target bit error rate (BER) of 10−6, thus resulting in a noticeable link enhancement of 4.5 km. Also, we demonstrate NRZ-based MDM-RoFSO link performance and availability in dust weather conditions using the BER, maximum reachable link range, and eye diagram as key performance parameters. We obtain a reliable transmission of 20 Gb/s-20 GHz data through HG00 and HG01 channels over a link range of 2500–108 m depending on the external dust weather condition. Furthermore, since this investigation shows the feasibility of RoFSO for small size cells, which is an essential feature of 5G mobile network, the proposed system can thus be implemented as a backhaul/fronthaul link for high-band (above 6 GHz) 5G services and for providing secure transmission of biomedical sensor data.

Optimizing High Data Rate Up to 2.5 Tbps Transmission using 64-Channel DWDM System with DCF and NRZ Modulation

“…Additionally, while utilizing the NRZ, the transmitter and APD receiver aperture diameters are more likely to fluctuate in size than when using the RZ (6) . When compared to RZ modulation, NRZ modulation performs noticeably better in terms of the performance, dependability, and accessibility of an NRZ-based transmission system (7) . Performance Enhancement of DWDM Optical Fiber Communication Systems Using EDFA offers considerably superior transmission properties than other amplifiers for long-distance transmission based on the amplification approaches (8) .…”

A two-way 224-Gbit/s PAM4-based fibre-FSO converged system

“…M. Singh et al presented a 40-Gbit/s FSO transmission based on orbital angular momentum multiplexed beams 16 . Moreover, a radio over FSO link under harsh weather conditions employing mode-division multiplexing was presented 17 . Furthermore, a high-speed radio over FSO transmission link under dust environment conditions employing hybrid wavelength- and mode- division multiplexing was demonstrated 18 .…”

Investigations on Orthogonal-Frequency Division Multiplexed-Mode-Division Multiplexed MM Wave-on-Free Space Optics Transmission using Laguerre-Gaussian Modal Beams

“…Millimetre waves (mmWave) ranging from 24 GHz -100 GHz frequency results in many performance merits and are considered as a crucial part of future 5 th Generation (5G) wireless services (Pham et al, 2015). It provides the mobile service providers with an important competitive merit to address the huge demand for high information rate transmission and to extend 5G services to industrial, enterprise and fixed wireless applications (Singh et al, 2021a;Borges et al, 2021). The transportation of mmWave signals over wireless channel is challenging due to large amount of path loss and blockage sensitivity (Majumdar and Ricklin, 2010).…”