Modification of atmospheric extinction coefficient of non-line-of-sight ultraviolet communication under weak turbulence

Li, Bifeng; Wang, Hongxing; Wu, Xiaojun; Song, Bo; Hu, Hao

doi:10.1016/j.optlastec.2014.08.008

Cited by 3 publications

(3 citation statements)

References 7 publications

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“…In this respect, several empirical path loss formulas that relied on a large amount of experimental results up to 100 m have been initially proposed [81][82][83][84][85]. For the longer regime UV links, the detrimental impact from fully coupled scattering and atmospheric turbulence that becomes more important have been initially investigated in [86][87][88][89][90][91][92][93][94][95][96][97][98][99][100][101]. In [86], preparatory models over a wide turbulence strength regime were proposed, highlighting that under certain geometric conditions, the collected scattered signals at the receiver input are averaged leading to a smoothed signal at the receiver output.…”

Section: Ultraviolet Communicationmentioning

confidence: 99%

“…The researchers in [98] extended the latter by proposing a Monte Carlo channel model that takes into account the multiple scattering effects in turbulent channel's behavior. Under weak turbulent UV channels, a modified quality indicator that is well-known as scintillation attenuation, was estimated in [99]. Following this approach, the atmospheric extinction coefficient was properly adjusted and a novel analytical expression for the single scattering path loss model was derived.…”

Section: Ultraviolet Communicationmentioning

confidence: 99%

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Energy-Efficient Emerging Optical Wireless Links

Varotsos,

Aidinis,

Nistazakis

et al. 2023

Energies

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In recent years, the tremendous increase in data traffic carried by wireless communication networks has generated the urgent need for establishing more energy-efficient wireless communication systems. Recent advances in semiconductor and light devices have triggered remarkable research interest to the development of these optical wireless communication (OWC) links. Among them, free-space optical (FSO) links and, more recently, ultraviolet links which operate within the (UV-C) spectral band, have been considered as prime candidates to create both high speed and power effective line-of-sight (LOS) and non-light-of-sight (NLOS) free-air communication links, respectively. Moreover, transdermal optical wireless (TOW) links for telemetry with medical implants minimize the expense of power for the implant. In the current review, a background on the energy efficiency challenges in wireless communication is presented. Each of these OWC technologies is mainly discussed in terms of key energy consumption requirements and major limiting factors that affect their power performance. Energy-efficient modulation formats as well as other powerful techniques for performance enhancement such as diversity and relaying are assessed. The survey is concluded with a discussion regarding their future energy consumption requirements and trends.

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Section: Ultraviolet Communicationmentioning

confidence: 99%

Section: Ultraviolet Communicationmentioning

confidence: 99%

Energy-Efficient Emerging Optical Wireless Links

Varotsos,

Aidinis,

Nistazakis

et al. 2023

Energies

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“…Based on Hufnagel–Valley model in Ref. 30, Cn2(h) is expressed as Cn2(h)=0.00594(Vrms/27)2(10−5h)10exp(−h/1000)+2.7×10−16exp(−h/1500)+Aexp(−h/100),where h is the altitude and Vrms is the root-mean-squared wind speed in meters per seconds (m/s), with a typical value of 21 m/s. A is a nominal value of Cn2(0) at the ground in m−2/3, and the typical value of A is 1.7×10−14 m…”

Section: Transmission Characteristics Of Turbulent Channel In Wireles...mentioning

confidence: 99%

Effect of atmospheric turbulent on mobile ultraviolet wireless communications

et al. 2022

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This paper proposes a method to study the transmission characteristics of ultraviolet turbulent channels, by considering the variation of atmospheric refractive index structure parameters along transmission paths. This method is adopted in a Monte Carlo simulation to analyze the transmission characteristics of ultraviolet light when the communication nodes are mobile. The analysis focuses on the influence of the moving speed and direction of the receiver on path loss under long-distance and atmospheric turbulence conditions. The simulation results show that, when the altitude increases, atmospheric refractive index structure parameters show a decreasing trend, and the path loss of the system decreases. With or without turbulence, when the receiver moves away from the transmitter in a horizontal plane, the received signal strength always decreases as the moving speed increases; and vice versa. When the receiver moves along the vertical axis, the signal strength increases as the moving speed increases. With the presence of atmospheric turbulence, the received signal strength attenuates significantly, compared with the case with no turbulence. When the receiver moves along the vertical axis, the path loss is higher compared with the situation when the receiver moves on the horizontal plane.

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