A Study of Non-Orthogonal Multiple Access in Underwater Visible Light Communication Systems

Geldard, Callum T.; Thompson, John; Popoola, Wasiu O.

doi:10.1109/vtcspring.2018.8417835

Cited by 21 publications

(10 citation statements)

References 14 publications

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“…In [25], the authors investigated the effect of random receiver orientation, residual interference, and node location on the outage probability (OP) performance of two users cooperative NOMA VLC in underwater environment, where they employed a decodeand-forward relay to improve the performance of the far user. Moreover, in [26], the authors numerically investigated the coverage probability and cell capacity of NOMA users in underwater VLC system. It is worth highlighting that a thorough performance evaluation of the OP of point-to-point NOMA in UVLC systems, in the presence of turbulence, is missing in the open literature.…”

Section: A Related Workmentioning

confidence: 99%

Non-Orthogonal Multiple Access-Based Underwater VLC Systems in the Presence of Turbulence

Bariah

Elamassie²,

Muhaidat

et al. 2022

IEEE Photonics J.

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The promising potential of underwater applications in visible light communication (VLC) systems has recently gained considerable research attention, as an efficient technology for enabling high data rate, massive connectivity, and ultra-low latency. Different from indoor VLC, underwater wireless communications experience harsh environmental challenges, yielding a degraded performance. Non-orthogonal multiple access (NOMA) was introduced to enhance spectral efficiency and connectivity of underwater VLC communications. In this paper, we develop a mathematical framework to evaluate the performance of NOMAenabled underwater VLC systems in the presence of turbulence. Specifically, we derive a closed-form expression for the outage probability of NOMA over lognormal channels, while considering the effect of path loss and turbulence. The derived analytical results with the corresponding numerical results demonstrate that the transmission distance between laser diode and sensor nodes (SNs) has a high impact on the outage performance of the SNs, due to the increased turbulence level with increased distance. Moreover, the presented results show the effect of the water type on the outage performance of the SNs and on the optimum values of the power coefficients.Index terms-Non-orthogonal multiple access (NOMA), underwater, outage probability, visible light communication (VLC), turbulence, path loss. I. INTRODUCTIONFew decades ago, the potential of underwater wireless communications (UWC) was confined to the military field, due to its inherent security feature. However, recently, UWC has become an active research area with broad civilian and commercial applications, such as underwater archaeology, gas and natural minerals exploration, navigation, and disaster precaution [1]. This is motivated by the notable advantages of UWC, which include reliability, cost efficiency, flexibility, and high data rate communications. In unguided water environment, UWC is conventionally realized by radio frequency (RF) Manuscript

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Section: A Related Workmentioning

confidence: 99%

Non-Orthogonal Multiple Access-Based Underwater VLC Systems in the Presence of Turbulence

Bariah

Elamassie²,

Muhaidat

et al. 2022

IEEE Photonics J.

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“…where h g is the geometric loss, h l is the path loss coefficient, and h t is the weak turbulence induced fading [17], [34], [35].…”

Section: B Channel Modelmentioning

confidence: 99%

“…The geometric loss of the line-of-sight (LoS) channel between the transmitter and receiver is the loss due to the geometric placement of transmitter and receiver. It can be determined through [17], [31]…”

Section: ) Geometric Lossmentioning

confidence: 99%

“…In [11], the performance of a NOMA aided UOWC system has been studied. In [17], the coverage probability and cell capacity of a NOMA aided UOWC system has been presented and it is shown that NOMA can increase the number of users within a cell. In [17], it has been shown that NOMA can be used to increase the number of users within a cell.…”

Section: Introductionmentioning

confidence: 99%

“…In [17], the coverage probability and cell capacity of a NOMA aided UOWC system has been presented and it is shown that NOMA can increase the number of users within a cell. In [17], it has been shown that NOMA can be used to increase the number of users within a cell. A NOMA aided UOWC system with a photon counting receiver has been presented in [18].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Average Rate Analysis of Cooperative NOMA Aided Underwater Optical Wireless Systems

Palitharathna

Suraweera

Godaliyadda

et al. 2021

IEEE Open J. Commun. Soc.

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In this paper, we consider a cooperative non-orthogonal multiple access (NOMA) aided underwater optical wireless system in which the source transmits to two users where the near user serves as a relay node to the far user. Our proposed system consists of multiple narrow-angle light-emitting diode (LED)/photodiode (PD) elements at the source, near user, and far user. In order to achieve communication, our system selects a single LED/PD at each node. We propose several low complexity LED/PD selection schemes that aim to maximize the link throughput and in addition consider optimal and random LED/PD selection for benchmarking. In order to characterize the performance of each scheme, bounds and closed-form tight approximations on the average achievable sum rates are presented. The use of multi element nodes and NOMA increase the average sum rate significantly over conventional orthogonal access. Moreover, near-optimal throughput can be achieved using channel gain based and line-of-sight based LED/PD selection schemes in the medium-to-high transmit power regimes. The derived expressions are also useful to investigate the impact of key system and channel parameters such as the source transmit power, power allocation factor, node placement, and the number of elements at each node.

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Implementation of MIMO concept for underwater visible light communication system

Pandey

Agrawal

2023

Opt Quant Electron

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A Study of Non-Orthogonal Multiple Access in Underwater Visible Light Communication Systems

Cited by 21 publications

References 14 publications

Non-Orthogonal Multiple Access-Based Underwater VLC Systems in the Presence of Turbulence

Non-Orthogonal Multiple Access-Based Underwater VLC Systems in the Presence of Turbulence

Average Rate Analysis of Cooperative NOMA Aided Underwater Optical Wireless Systems

Implementation of MIMO concept for underwater visible light communication system

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