Performance Evaluation of FSO Communications under Sand-Dust Conditions

Cao, Maoyong; Wang, Huiqin; Yu, Ye; Hou, Shanglin

doi:10.1155/2019/2046896

Cited by 10 publications

(5 citation statements)

References 22 publications

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“…The concentration of coal dust normally describes the number of dust particles within a unit volume, which further reflects the visibility; this visibility parameter can be used to estimate the approximate attenuation. The visibility data are utilized to compute the coal dust attenuation for optical signal in an underground mine and the expression for attenuation is given as [37]…”

Section: Coal Dust Concentration and Visibilitymentioning

confidence: 99%

Characteristic Study of Visible Light Communication and Influence of Coal Dust Particles in Underground Coal Mines

et al. 2021

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The critical environment of the underground mines is a risky zone for mining applications and it is very hazardous to engage the miners without a sophisticated communication system. The existing wired networks are susceptible to damage and the wireless radio systems experience severe fading that restricts the complete access to the entire assembly of a mine. Wireless optical communication is a better approach that can be incorporated in the erratic atmosphere of underground mines to overcome such issues, as lights are already used to illuminate the mine galleries. This study is focused on investigating the characteristics of visible light communication (VLC) in an underground coal mine. The entire scope of VLC is elaborated along with the influence of coal dust particles and the scattering model. The impact of coal dust clouds on visibility and attenuation is analyzed for visible light transmission. The shadowing effect generated by the pillars and mining machinery is estimated by employing the bimodal Gaussian distribution (BGD) approach in coal mines. The characteristic model of VLC for underground coal mines is presented by classifying the area of the mine into mine gallery and sub-galleries. The transmission links of VLC are categorized as the line of sight (LOS) link for direct propagation and the non-LOS (NLOS) link for reflected propagation. The scenarios of LOS and NLOS propagation are considered for each evaluating parameter. Furthermore, the performance of the proposed framework is examined by computing the received signal power, path loss, delay spread (DS), and signal to noise ratio (SNR).

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Section: Coal Dust Concentration and Visibilitymentioning

confidence: 99%

Characteristic Study of Visible Light Communication and Influence of Coal Dust Particles in Underground Coal Mines

et al. 2021

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“…Multiple scattering is prominent in air conditions with sandy dust, causing signal pulse delay and pulse broadening. According to a numerical simulation, and also the signal attenuation follows a negative exponential distribution of laser wavelength, and a laser with a longer wavelength provides better performance [44].…”

Section: Journal Of Robotics and Control (Jrc)mentioning

confidence: 99%

A Free Space Optic/Optical Wireless Communication: A Survey

Mahdi

Essa

2022

Journal of Robotics and Control

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The exponential demand for the next generation of services over free space optic and wireless optic communication is a necessity to approve new guidelines in this range. In this review article, we bring together an earlier study associated with these schemes to help us implement a multiple input/multiple output flexible platform for the next generation in an efficient manner. OWC/FSO is a complement clarification to radiofrequency technologies. Notably, they are providing various gains such as unrestricted authorizing, varied volume, essential safekeeping, and immunity to interference.

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“…In [24], visual range is described as the distance to an entity at which the picture distinction falls to 2% of the original ocular contrast (100%) along the transmission distance usually referred to as the Koschmieder law. This 2% falloff value recognized as the visual threshold T vis is adopted here so as to follow the Koschmieder law as opposed to the T vis 5% considered in aviation operations [25,26]. The visibility is computed at 550 nm wavelength since the highest solar radiation concentration occurs here.…”

Section: Fso Evaluation In Dust Channelmentioning

confidence: 99%

Performance Investigation of a High Data Rate Mode Division Multiplexed-Free Space Optics Link Under Harsh Weather Conditions

et al. 2021

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The requirement of high data rate information transmission is rising exponentially for supporting different services including social networking, web streaming, and biomedical sensor data transmission. Such services required high channel bandwidth with secure information transmission and immunity to electromagnetic interference. Radio over free space optics (RoFSO) is witnessed as a promising technological solution to provide high data rate transmission over free space channel. We report on the design of a 2×10 Gb/s-10 GHz RoFSO transmission system using the mode division multiplexing technique and evaluate its transmission performance over varying levels of dust weather conditions. The comparison of non-return to zero (NRZ) and return to zero (RZ) binary digital optical modulation techniques is carried out in the proposed system. It is found that the proposed system using NRZ modulation serves 14.5 km transmission range; however, in the case of RZ modulation, it was restricted to 10 km for a target bit error rate (BER) of 10−6, thus resulting in a noticeable link enhancement of 4.5 km. Also, we demonstrate NRZ-based MDM-RoFSO link performance and availability in dust weather conditions using the BER, maximum reachable link range, and eye diagram as key performance parameters. We obtain a reliable transmission of 20 Gb/s-20 GHz data through HG00 and HG01 channels over a link range of 2500–108 m depending on the external dust weather condition. Furthermore, since this investigation shows the feasibility of RoFSO for small size cells, which is an essential feature of 5G mobile network, the proposed system can thus be implemented as a backhaul/fronthaul link for high-band (above 6 GHz) 5G services and for providing secure transmission of biomedical sensor data.

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Performance Evaluation of FSO Communications under Sand-Dust Conditions

Cited by 10 publications

References 22 publications

Characteristic Study of Visible Light Communication and Influence of Coal Dust Particles in Underground Coal Mines

Characteristic Study of Visible Light Communication and Influence of Coal Dust Particles in Underground Coal Mines

A Free Space Optic/Optical Wireless Communication: A Survey

Performance Investigation of a High Data Rate Mode Division Multiplexed-Free Space Optics Link Under Harsh Weather Conditions

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