Selection Combining in Hybrid RF/FSO Systems for IM/DD and Heterodyne Detection in Varying Weather Conditions

Sundharam, Vaibhav; Johari, Shagun

doi:10.1109/icmete.2018.00069

Cited by 3 publications

(2 citation statements)

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“…In the second phase, H J decodes the S signal and forwards it to G using hybrid RF/FSO communication. At the ground level, selection combining (SC) is adopted to maximize the utilization of the channel spectrum and to enhance the system as it outputs an SNR equal to the maximum SNR of the two RF and FSO branches [15]. In this setup, the FSO links follow exponentiated Weibull (EW) fading, whereas the RF link is modeled with the shadowed-Rician distribution.…”

Section: Signal and System Modelmentioning

confidence: 99%

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HAPS Selection for Hybrid RF/FSO Satellite Networks

Yahia¹,

Erdoğan²,

Kurt³

et al. 2021

Preprint

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Non-terrestrial networks have been attracting much interest from the industry and academia. Satellites and high altitude platform station (HAPS) systems are expected to be the key enablers of next-generation wireless networks. In this paper, we introduce a novel downlink satellite communication (SatCom) model where free-space optical (FSO) communication is used between a satellite and HAPS node, and a hybrid FSO/radiofrequency (RF) transmission model is used between the HAPS node and ground station (GS). In the first phase of transmission, the satellite selects the HAPS node that provides the highest signal-to-noise ratio (SNR). In the second phase, the selected HAPS decodes and forwards the signal to the GS. To evaluate the performance of the proposed system, outage probability expressions are derived for exponentiated Weibull (EW) and shadowed-Rician fading models while considering the atmospheric turbulence, stratospheric attenuation, and attenuation due to scattering, path loss, and pointing errors. Furthermore, the impact of aperture averaging, temperature, and wind speed are investigated. Finally, we provide some important guidelines that can be helpful for the design of practical HAPS-aided SatCom.

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Section: Signal and System Modelmentioning

confidence: 99%

“…Hybrid RF/FSO communication has been studied from different perspectives and in various scenarios in [11], [12], [13]. Furthermore, the authors in [14] and [15] proposed a parallel transmission of the same information through RF and FSO links, while considering different diversity-combining techniques.…”

Section: Introductionmentioning

confidence: 99%