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- W4312560499 abstract "This paper investigates the performance of high altitude platforms high altitude platforms (HAPS) based free-space optical (FSO) communication links including HAPS-to-ground station (downlink), ground-to-HAPS (uplink) and HAPS-to-HAPS (horizontal link) communications. The effects of attenuation loss, atmospheric turbulence, pointing error and angle-of-arrival (AOA) are taken into account. Also, the application of adaptive optics correction, one of the most effective turbulence mitigation techniques, is analyzed using the Zernike polynomials representation. Analytical expressions are obtained for probability density function (PDF), cumulative distribution function (CDF), Rytov variance, adaptive optics filter function and outage probability mainly in terms of Meijer’s G functions when both no adaptive optics correction is used and adaptive optics correction is applied. Some selected results are presented depending on the various parameters such as the HAPS altitude, the ratio of vertical and horizontal deviations, beam waist, Zenith angle, height of ground station, receiver aperture diameter, channel state threshold and wind speed. The performance improvement with adaptive optics correction is investigated by removing different Zernike modes. We show that (i) the downlink outperforms the uplink, (ii) the performance of the horizontal link sharply increases above a certain altitude, and, (iii) the communication links benefit from the adaptive optics correction up to a certain level in terms of performance improvement." @default.
- W4312560499 created "2023-01-05" @default.
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- W4312560499 date "2023-07-01" @default.
- W4312560499 modified "2023-10-10" @default.
- W4312560499 title "HAPS Based FSO Links Performance Analysis and Improvement With Adaptive Optics Correction" @default.
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- W4312560499 doi "https://doi.org/10.1109/twc.2022.3230737" @default.
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