HAPS Selection for Hybrid RF/FSO Satellite Networks

Nonterrestrial networks have been attracting much interest from the industry and academia. Satellites high-altitude platform station (HAPS) systems are expected to be key enablers of next-generation wireless networks. In this article, we introduce a novel downlink satellite communication (SatCom) model, where free-space optical (FSO) is adopted between HAPS node. A hybrid FSO/radio-frequency transmission model used node ground (GS). first phase transmission, selects that provides highest signal-to-noise ratio. second phase, selected decodes forwards signal GS. To evaluate performance proposed system, outage probability expressions derived for exponentiated Weibull shadowed-Rician fading models while considering atmospheric turbulence, stratospheric attenuation, attenuation due scattering, path loss, pointing errors. Additionally, asymptotic analysis carried out, diversity gain provided. Furthermore, impacts aperture averaging technique, temperature, wind speed investigated. We also provide some important guidelines can helpful design practical HAPS-aided SatCom. Finally, results show use improves system performs better than all other existing models.