Performance analysis of rate-splitting multiple access in intelligent reflecting surface-assisted uplink hybrid satellite-terrestrial networks

Mehmet Can*, Ibrahim Altunbas

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, we investigate the performance of a rate-splitting multiple access (RSMA)-based intelligent reflecting surface (IRS)-assisted uplink hybrid satellite-terrestrial network. We consider three different scenarios based on the channel phase knowledge at the IRS, namely, the ideal, partial, and blind cases. In the ideal case, the IRS has full knowledge of both the user-to-IRS and IRS-to-satellite channel phase information. In the partial case, the IRS has only the user-to-IRS channel phase information. Last, in the blind case, the IRS has no any knowledge of the phase information. We assume that the user-to-IRS channel follows Rician fading, and the IRS-to-satellite channel follows the shadowed Rician fading. The closed-form tight outage probability expressions for all three scenarios are derived. The accuracy of the derivations is confirmed by simulation results. In addition, it is shown that the performance of the RSMA-based system is superior to those of the conventional non-orthogonal and orthogonal multiple access-based systems with a small number of reflecting elements at high target rates.

Original languageEnglish
Article numbere5917
JournalInternational Journal of Communication Systems
Volume37
Issue number17
DOIs
Publication statusAccepted/In press - 2024

Bibliographical note

Publisher Copyright:
© 2024 John Wiley & Sons Ltd.

Keywords

  • hybrid satellite-terrestrial network (HSTN)
  • intelligent reflecting surface (IRS)
  • rate-splitting multiple access (RSMA)
  • uplink

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