Enhanced performance of FSO link using OFDM and comparison with traditional TDM-FSO link

Kumar, Pravindra; Srivastava, Anand

doi:10.1109/ibp.2015.7230767

Cited by 16 publications

(5 citation statements)

References 12 publications

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“…The gamma-gamma (GG) distribution is used to describe the PDF of the irradiance fluctuations and to model atmospheric fading [20]- [22]. In this case the probability of a given intensity of gamma-gamma scintillation model is [23]: √ ) ; (11) Where, ( ) is the Gamma function, (..) is the modified Bessel function of the second kind, α and β are the variances of the small and large scale eddies respectively defined as [24]:…”

Section: Atmospheric Turbulencementioning

confidence: 99%

Performance Investigation of OFDM-FSO System under Diverse Weather Conditions of Bangladesh

Sultana¹,

Barua²,

Akhtar³

et al. 2018

IJECE

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Free space optical (FSO) communication systems which are deployed for last mile access, being considered as a suitable alternative technology for optical fiber networks. It is one of the emerging technologies for broadband wireless connectivity which has also been receiving growing attention due to high data rate transmission capability with low installation cost and license free spectrum. However, the widespread use of FSO technology has been hampered by the randomly time varying characteristics of propagation path mainly due to atmospheric turbulence, sensitivity to diverse weather conditions and the nonlinear responsivity of laser diode. This paper presents the performance investigation of an OFDM-FSO system over atmospheric turbulence channels under diverse weather conditions of Bangladesh. The channel is modeled with gamma-gamma distribution using 16-QAM modulation format and 4×4 multiple transceiver FSO system. All possible challenges are imposed on the system performance such as atmospheric attenuation, turbulence, pointing error, geometric loss etc. The refractive index structure parameter and atmospheric attenuation coefficient for different weather conditions are calculated by using the data, collected from Bangladesh Meteorological Department. The acquired results can be fruitful for scheming, forecasting and assessing the OFDM-FSO system’s ability to transmit wireless services over turbulent FSO links under actual conditions of Bangladesh.

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Section: Atmospheric Turbulencementioning

confidence: 99%

Performance Investigation of OFDM-FSO System under Diverse Weather Conditions of Bangladesh

Sultana¹,

Barua²,

Akhtar³

et al. 2018

IJECE

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“…3) Satellite-to-satellite communication: For the intersatellite channel between the SUE and the LEO satellite, free space optical (FSO) communication is used to reduce inter-user interference and improve communication security for achieving the long-range and high-speed data transmission. According to the characteristics of FSO communication described in [36] and [37], the data transmission rate from the l-th SUE to the n-th LEO satellite can be expressed as…”

Section: A Communication Modelmentioning

confidence: 99%

Design of Delay-Optimal Robust Edge Computing in 6G Wireless Networks

Wang

Chen

Qiao

2022

2022 14th International Conference on Wireless Communications and Signal Processing (WCSP)

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In this paper, we investigate the issue of satelliteterrestrial computing in the sixth generation (6G) wireless networks, where multiple terrestrial base stations (BSs) and low earth orbit (LEO) satellites collaboratively provide edge computing services to ground user equipments (GUEs) and space user equipments (SUEs) over the world. In particular, we design a complete process of satellite-terrestrial computing in terms of communication and computing according to the characteristics of 6G wireless networks. In order to minimize the weighted total energy consumption while ensuring delay requirements of computing tasks, an energy-efficient satellite-terrestrial computing algorithm is put forward by jointly optimizing offloading selection, beamforming design and resource allocation. Finally, both theoretical analysis and simulation results confirm fast convergence and superior performance of the proposed algorithm for satellite-terrestrial computing in 6G wireless networks.

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“…[7]. The efficiency of FSO is affected by environmental characteristics such as fog, rain, dust, etc., [8]. While having a clear line of sight is an essential requirement for Free Space Optical Communication (FSO) technology, however, it is not the only challenge, other challenges associated with FSO technology include atmospheric interference, such as fog, rain, and snow, which can cause signal attenuation and limit the range of FSO systems.…”

Section: Introductionmentioning

confidence: 99%

Multiple Channel Network Scheme employing Hybrid FSO and NB-PLC for smart city environment

Sharma,

Huilgol

2023

2023 24th International Conference on Applied Electromagnetics and Communications (ICECOM)

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The practical design of Free-space optical communications (FSOs) faces significant challenges due to atmospheric turbulence and pointing errors. To overcome these obstacles, a hybrid technology combining FSO with NB-PLC scheme has been analyzed in this paper. The study evaluates the area coverage of a hybrid model of Power Line Communication (PLC) and Free Space Optical Communication (FSO) by measuring the Successful Transmission Probability (STP) and probability of error. The analysis assumes that the PLC channel undergoes Rayleigh fading, while FSO links are modeled using the Gamma-Gamma distribution. An algorithm is used to weigh each link by its Successful Transmission Probability (STP) and select the best possible path using the Single Channel Selection scheme (SCS). The Monte Carlo simulation results demonstrate that the proposed system is highly advantageous in smart city environments where channel fading is dynamic.

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Enhanced performance of FSO link using OFDM and comparison with traditional TDM-FSO link

Cited by 16 publications

References 12 publications

Performance Investigation of OFDM-FSO System under Diverse Weather Conditions of Bangladesh

Performance Investigation of OFDM-FSO System under Diverse Weather Conditions of Bangladesh

Design of Delay-Optimal Robust Edge Computing in 6G Wireless Networks

Multiple Channel Network Scheme employing Hybrid FSO and NB-PLC for smart city environment

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