Cooperative and cognitive non-orthogonal multiple access (CCR-NOMA) has been
recognized as a promising technique to overcome spectrum scarcity and massive …

In this paper, we investigate the performance of non-orthogonal multiple access (NOMA)-
based overlay cognitive integrated satellite-terrestrial relay network with secondary network …

This paper considers a two-user downlink transmission in reconfigurable intelligent surface
(RIS)-aided network over fading channels. Particularly, by employing user grouping and …

The conflation of cognitive radio (CR) and non-orthogonal multiple access (NOMA) concepts
is a promising approach to fulfill the massive connectivity goals of future networks given the …

Overlay mechanism offers secondary users (SUs) chances to access licensed spectrum of
primary users (PUs) to improve spectrum utilization efficiency. However, these chances …

This work elaborates the analysis on ergodic capacity, coverage probability, and average
throughput for multi-user non-orthogonal multiple access (NOMA) based device-to-device …

Satellite communication has attracted great interests due to extensive coverage and no
terrain restriction, which can make up for the shortcomings of terrestrial communication …

In this paper, the performance of a multicarrier underlay cognitive radio system is analyzed
considering that the successive interference cancellation (SIC) method is used for detection …

This paper presents a star-of-star topology for internet-of-things (IoT) networks using mega
low-Earth-orbit constellations. The proposed topology enables IoT users to broadcast their …

The primary constraints inherent in the millimeter wave (mmWave) technology manifest as
high path loss and limited range. As a result, a line-of-sight environment is necessary for a …