Analysis of RIS-based terrestrial-FSO link over G-G turbulence with distance and jitter ratios

Ndjiongue, Alain R. and Ngatched, Telex M. N. and Dobre, Octavia A. and Armada, Ana G. and Haas, Harald (2021) Analysis of RIS-based terrestrial-FSO link over G-G turbulence with distance and jitter ratios. Journal of Lightwave Technology, 39 (21). 6746 - 6758. ISSN 0733-8724 (https://doi.org/10.1109/JLT.2021.3108532)

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Abstract

One of the main problems faced by communication systems is the presence of skip-zones in the targeted areas. With the deployment of the fifth-generation mobile network, solutions are proposed to solve the signal loss due to obstruction by buildings, mountains, and atmospheric or weather conditions. Among these solutions, reconfigurable intelligent surfaces (RIS), which are newly proposed modules, may be exploited to reflect the incident signal in the direction of dead zones, increase communication coverage, and make the channel smarter and controllable. This paper tackles the skip-zone problem in terrestrial free-space optical (T-FSO) systems using a single-element RIS. Considering link distances and jitter ratios at the RIS position, we carry out a performance analysis of RIS-aided T-FSO links affected by turbulence and pointing errors, for both heterodyne detection and intensity modulation-direct detection techniques. Turbulence is modeled using the Gamma-Gamma distribution. We analyze the model and provide exact closed-form expressions of the probability density function, cumulative distribution function, and moment generating function of the end-to-end signal-to-noise ratio. Capitalizing on these statistics, we evaluate the system performance through the outage probability, ergodic channel capacity, and average bit error rate for selected binary modulation schemes. Numerical results, validated through simulations, obtained for different RIS positions and link distances ratio values, reveal that RIS-based T-FSO performs better when the RIS module is located near the transmitter.

  • Item type:Article
    ID code:78427
    Dates:
    Date
    Event
    1 November 2021
    Published
    30 August 2021
    Published Online
    25 August 2021
    Accepted
    Notes:© 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
    Subjects:Science > Physics > Optics. Light
    Department:Faculty of Engineering > Electronic and Electrical Engineering
    Depositing user: Pure Administrator
    Date deposited:05 Nov 2021 15:10
    Last modified:21 Nov 2024 01:21
    URI:https://strathprints.strath.ac.uk/id/eprint/78427
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