Keywords :
Bat algorithm optimization (BAO); Cognitive Radio (CR); Nonorthogonal Multiple Access (NOMA); Reconfigurable intelligent surface (RIS); Unmanned Aerial Vehicle (UAV); Aerial vehicle; Algorithms optimizations; Bat algorithm optimization; Bat algorithms; Cognitive radio; Multiple access; Non-orthogonal; Nonorthogonal multiple access; Reconfigurable; Reconfigurable intelligent surface; Unmanned aerial vehicle; Artificial Intelligence; Computer Networks and Communications; Computer Science Applications; Modeling and Simulation; Information Systems; Signal Processing
Abstract :
[en] This paper examines a cognitive radio (CR) non-orthogonal multiple access (NOMA) system, which deploys an unmanned aerial vehicle (UAV) with a reconfigurable intelligent surface (RIS) in a disaster area. In particular, in the primary network, a base station (BS) communicates with a primary receiver (PR), while a secondary transmitter (ST) simultaneously sends superimposed signals to the two sensor destinations (SDs) via NOMA with the help of the UAV-RIS. Furthermore, a UAV eavesdropper (UE) wiretaps the signals from the UAV-RIS. To improve system performance, we then employ bat algorithm optimization (BAO) to maximize secondary network throughput under outage probability and security constraints.
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