Home > Published Issues > 2021 > Volume 16, No. 9, September 2021 >

The Effect of Medium Inhomogeneity in Modeling Underwater Optical Wireless Communication

Safiy Sabril 1, Faezah Jasman 1, Wan Hafiza Wan Hassan 2, Zaiton A. Mutalip 3, Rosmiwati Mohd-Mokhtar 4, and Zainuriah Hassan 1
1. Institute of Nano Optoelectronics Research and Technology (INOR), Universiti Sains Malaysia, Penang, Malaysia
2. Faculty of Ocean Engineering Technology and Informatics, Universiti Malaysia Terengganu, Terengganu, Malaysia
3. Centre for Telecommunication Research & Innovation (CeTRI), Faculty of Electronic & Computer Engineering, Universiti Teknikal Malaysia Melaka, Malaysia
4. School of Electrical and Electronic Engineering, Universiti Sains Malaysia, Penang, Malaysia

Abstract—This paper introduces a stratified approach to modeling underwater optical wireless communication (UOWC). The influence of medium inhomogeneity, which many researchers ignore, was considered in modeling the UOWC channel to achieve an accurate model. The Monte Carlo technique to simulate the photon propagation was adapted to include medium inhomogeneity to estimate the received power, channel bandwidth, and delay spread of the proposed model. We use the depth-dependent chlorophyll profile that was established in Kameda empirical model to constitute the medium inhomogeneity. The empirical model used 0.5 mg m-3 and 2 mg m-3 of surface chlorophyll concentration to represent clear and coastal water. Besides, the comparison between collimated and diffused links was also studied to highlight the effect of the medium inhomogeneity on both links. Our findings indicate that the homogeneous model produces an underestimation result compared to the stratified model. The stratified model estimated significant increases in received power, lower delay spread, and higher bandwidth, which indicates the medium inhomogeneity is important for a realistic channel model.
Index Terms—Monte carlo, underwater wireless communication, depth dependent attenuation, channel modeling, chlorophyll concentration

Cite: Safiy Sabril, Faezah Jasman, Wan Hafiza Wan Hassan, Zaiton A. Mutalip, Rosmiwati Mohd-Mokhtar, and Zainuriah Hassan, "The Effect of Medium Inhomogeneity in Modeling Underwater Optical Wireless Communication," Journal of Communications vol. 16, no. 9, pp. 386-393, September 2021. Doi: 10.12720/jcm.16.9.386-393

Copyright © 2021 by the authors. This is an open access article distributed under the Creative Commons Attribution License (CC BY-NC-ND 4.0), which permits use, distribution and reproduction in any medium, provided that the article is properly cited, the use is non-commercial and no modifications or adaptations are made.