In disaster-stricken areas, establishing reliable communication poses a significant challenge. Unmanned aerial vehicles (UAVs) offer a promising solution by serving as aerial relays, extending the network range, and providing communication services to affected areas. Cutting-edge technologies such as reconfigurable intelligent surfaces (RISs) and nonorthogonal multiple access (NOMA) are utilized to enhance UAV communication. This article investigates the performance of a NOMA network equipped with a single UAV and an RIS. Specifically, we explore a NOMA-based transmission scenario involving a temporary base station and two ground users, integrating a UAV and an RIS mounted on it. In addition, this work evaluates the end-to-end outage probability and ergodic capacity, considering the Nakagami-$m$ fading channel. Diversity combining techniques, including selection combining (SC) and maximum-ratio combining (MRC), are applied to the signals received via the UAV and RIS at the end users. The impact of diversity combining and imperfect successive interference cancellation (SIC) during the decoding process on outage and ergodic capacity is analyzed. Analytical expressions for outage probability and ergodic capacity based on SC and MRC are derived. Furthermore, the performance of both perfect and imperfect SIC-based NOMA schemes, considering the phase error of the RIS is analyzed. The effect of splitting the elements of the RIS for two ground users, indicating an optimal split factor is assessed.
UAV-RIS Enabled NOMA Network for Disaster Management With Hardware Impairments
IEEE Transactions on Aerospace and Electronic Systems ; 60 , 6 ; 7995-8009
01.12.2024
1611588 byte
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch