Performance evaluation of underwater wireless optical communications links in the presence of different air bubble populations

Oubei, Hassan M.; ElAfandy, Rami T.; Park, Kihong; Ng, Tien Khee; Alouini, Mohamed‐Slim; Ooi, Boon S.

doi:10.1109/ipcon.2017.8116177

Cited by 34 publications

(50 citation statements)

References 24 publications

(23 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In [21], the random fluctuations of the received optical signal through the UWOC channel with air bubbles has been experimentally studied and the accuracy of some of the most known statistical distributions in predicting the intensity random fluctuations has been examined. Subsequently, in a recent work [22], the performance of UWOC systems in the presence of different air bubble populations has experimentally been evaluated.…”

Section: U Nderwater Wireless Optical Communication (Uwoc)mentioning

confidence: 99%

Statistical Studies of Fading in Underwater Wireless Optical Channels in the Presence of Air Bubble, Temperature, and Salinity Random Variations

Jamali

Mirani

Parsay

et al. 2018

IEEE Trans. Commun.

187

119

View full text Add to dashboard Cite

Optical signal propagation through underwater channels is affected by three main degrading phenomena, namely absorption, scattering, and fading. In this paper, we experimentally study the statistical distribution of intensity fluctuations in underwater wireless optical channels with random temperature and salinity variations as well as the presence of air bubbles. In particular, we define different scenarios to produce random fluctuations on the water refractive index across the propagation path, and then examine the accuracy of various statistical distributions in terms of their goodness of fit to the experimental data. We also obtain the channel coherence time to address the average period of fading temporal variations. The scenarios under consideration cover a wide range of scintillation index from weak to strong turbulence. Moreover, the effects of beamcollimator at the transmitter side and aperture averaging lens at the receiver side are experimentally investigated. We show that the use of a transmitter beam-collimator and/or a receiver aperture averaging lens suits single-lobe distributions such that the generalized Gamma and exponentiated Weibull distributions can excellently match the histograms of the acquired data. Our experimental results further reveal that the channel coherence time is on the order of 10 −3 seconds and larger which implies to the slow fading turbulent channels.

show abstract

Section: U Nderwater Wireless Optical Communication (Uwoc)mentioning

confidence: 99%

Statistical Studies of Fading in Underwater Wireless Optical Channels in the Presence of Air Bubble, Temperature, and Salinity Random Variations

Jamali

Mirani

Parsay

et al. 2018

IEEE Trans. Commun.

187

119

View full text Add to dashboard Cite

show abstract

“…In addition to attenuation and scattering, a light beam can also be affected by air-bubbles that can be potentially produced by the breaking of surface waves that infuse the air from the atmosphere into the top layer of the water [32]. When propagating through bubbly water, laser beams get partially or completely obstructed depending on the sizes of the bubbles and the beam radius [33]. This could lead to a deep fading in the received signal as observed in [33].…”

Section: Underwater Propagationmentioning

confidence: 99%

“…When propagating through bubbly water, laser beams get partially or completely obstructed depending on the sizes of the bubbles and the beam radius [33]. This could lead to a deep fading in the received signal as observed in [33]. Temperature and salinity in-homogeneity induce random changes in the refractive index of the water and significantly affect communication quality.…”

Section: Underwater Propagationmentioning

confidence: 99%

A CNN-Based Structured Light Communication Scheme for Internet of Underwater Things Applications

Trichili

Issaid

Ooi

et al. 2020

IEEE Internet Things J.

Self Cite

View full text Add to dashboard Cite

Underwater optical wireless communication is an emerging field that can provide reliable connectivity for future generation internet of underwater things devices. In this paper, we propose a communication system based on single and superposition of Laguerre Gaussian modes to transfer information and rely on a convolutional neural network for the mode identification in an underwater environment. A 100% recovery fidelity is reported at clear and turbid water. Beyond 90% of identification, accuracy is achieved under different laboratory-emulated underwater turbulence conditions. The practical implementation of the proposed spatial-mode based communication scheme is further discussed.

show abstract

“…In laboratory experiments, Maalox solution is known to present excellent scattering characteristics similar to real ocean particles [27,28]. Laux et al experimentally validated the use of Maalox as scattering agent by measuring and comparing its volume scattering function (VSF) against two different measurements in a 3 m laboratory water tank in [27] which can be used as a baseline for determining the amount of Maalox concentration needed to emulate different ocean water types [13,[29][30][31]. Volume (V in μL) of Maalox was calculated and added to the 23 liters of tap water in an orderly fashion based on [27] to produce four ocean waters, namely clear sea water, coastal water, harbor I water, and harbor II water.…”

Section: Experiments Detailsmentioning

confidence: 99%

375-nm ultraviolet-laser based non-line-of-sight underwater optical communication

Sun¹,

Cai²,

Alkhazragi³

et al. 2018

Opt. Express

Self Cite

View full text Add to dashboard Cite

Abstract:For circumventing the alignment requirement of line-of-sight (LOS) underwater wireless optical communication (UWOC), we demonstrated a non-line-of-sight (NLOS) UWOC link adequately enhanced using ultraviolet (UV) 375-nm laser. Path loss was chosen as a figure-of-merit for link performance in this investigation, which considers the effects of geometries, water turbidity, and transmission wavelength. The experiments suggest that path loss decreases with smaller azimuth angles, higher water turbidity, and shorter wavelength due in part to enhanced scattering utilizing 375-nm radiation. We highlighted that it is feasible to extend the current findings for long distance NLOS UWOC link in turbid water, such as harbor water.

show abstract

Performance evaluation of underwater wireless optical communications links in the presence of different air bubble populations

Cited by 34 publications

References 24 publications

Statistical Studies of Fading in Underwater Wireless Optical Channels in the Presence of Air Bubble, Temperature, and Salinity Random Variations

Statistical Studies of Fading in Underwater Wireless Optical Channels in the Presence of Air Bubble, Temperature, and Salinity Random Variations

A CNN-Based Structured Light Communication Scheme for Internet of Underwater Things Applications

375-nm ultraviolet-laser based non-line-of-sight underwater optical communication

Contact Info

Product

Resources

About