Journal ArticleDOI
Bit error rate of focused Gaussian beams in weak oceanic turbulence
Reads0
Chats0
TLDR
The scintillation index and BER versus the average signal-to-noise ratio is found by using the log-normal distributed intensity for the collimated and focused Gaussian beams, which are exhibited for various source sizes α, focal lengths F, and rates of dissipation of the turbulent kinetic energy per unit mass of fluid ε.Abstract:
Formulation of the on-axis scintillation index of a focused Gaussian beam in weak oceanic turbulence is derived by using the Rytov method, and using this formulation, the average bit error rate (BER) is evaluated. The scintillation indices of collimated, focused Gaussian, plane, and spherical beams are compared. The scintillation index and BER versus the average signal-to-noise ratio is found by using the log-normal distributed intensity for the collimated and focused Gaussian beams, which are exhibited for various source sizes α(s), focal lengths F(s), rates of dissipation of the mean squared temperature χ(T), and rates of dissipation of the turbulent kinetic energy per unit mass of fluid e. Focused beams are found to have important advantages over collimated beams. For the focused beam, as the source size increases, the scintillation index and BER decrease. When the focal length is equal to the propagation length, the BER is found to possess the smallest value. The BER is proportional to χ(T), but inversely proportional to e.read more
Citations
More filters
Journal ArticleDOI
Performance Studies of Underwater Wireless Optical Communication Systems With Spatial Diversity: MIMO Scheme
TL;DR: This paper analytically studies the performance of multiple-input multiple-output underwater wireless optical communication (UWOC) systems with ON–OFF keying modulation and shows that spatial diversity can considerably improve the system performance, especially for channels with higher turbulence.
Journal ArticleDOI
Statistical Studies of Fading in Underwater Wireless Optical Channels in the Presence of Air Bubble, Temperature, and Salinity Random Variations
Mohammad Vahid Jamali,Ali Mirani,Alireza Parsay,Bahman Abolhassani,Pooya Nabavi,Ata Chizari,Pirazh Khorramshahi,Sajjad Abdollahramezani,Jawad A. Salehi +8 more
TL;DR: It is shown that the use of a transmitter BEC and/or a receiver AAL suits single-lobe distributions, such that the generalized Gamma and exponentiated Weibull distributions can excellently match the histograms of the acquired data.
Journal ArticleDOI
Underwater optical communication performance for laser beam propagation through weak oceanic turbulence.
Xiang Yi,Zan Li,Zengji Liu +2 more
TL;DR: Using the refractive index spectrum of oceanic turbulence under weak turbulence conditions, analysis of the aperture-averaged scintillation index is carried out, for a horizontally propagating plane wave and spherical wave, the associated probability of fade, mean signal-to-noise ratio, and mean bit error rate are analyzed.
Journal ArticleDOI
Unified Statistical Channel Model for Turbulence-Induced Fading in Underwater Wireless Optical Communication Systems
TL;DR: This is the first-ever comprehensive channel model addressing the statistics of optical beam irradiance fluctuations in underwater wireless optical channels due to both air bubbles and temperature gradient, and it is shown to provide a perfect fit with the measured data under all channel conditions for both types of water.
Posted Content
Performance Studies of Underwater Wireless Optical Communication Systems with Spatial Diversity: MIMO Scheme
TL;DR: In this article, the performance of multiple-input multiple-output underwater wireless optical communication (MIMO UWOC) systems with on-off keying (OOK) modulation is analyzed.
References
More filters
Book
Wave propagation and scattering in random media
TL;DR: This IEEE Classic Reissue presents a unified introduction to the fundamental theories and applications of wave propagation and scattering in random media and is expressly designed for engineers and scientists who have an interest in optical, microwave, or acoustic wave propagate and scattering.
Journal ArticleDOI
Theory of optical scintillation
TL;DR: In this article, a heuristic model of irradiance fluctuations for a propagating optical wave in a weakly inhomogeneous medium is developed under the assumption that small-scale irradiance fluctuation fluctuations are modulated by large-scale fluctuations of the wave.
Journal ArticleDOI
Light scintillation in oceanic turbulence
TL;DR: In this paper, the scintillation index of plane and spherical light waves as well as of a Gaussian beam, propagating in the clear-water weakly turbulent ocean, is revealed.
Related Papers (5)
Spectrum of Turbulent Fluctuations of the Sea-Water Refraction Index
V. V. Nikishov,V. I. Nikishov +1 more