To improve the radio spectral efficiency for 5G and beyond, novel radio access techniques
need to be designed to accommodate unprecedented number of connected devices, and …

Overlay networks allow the unlicensed transmitter (UT) to aid the licensed transmitter (LT) by
sending the superimposed signal including messages of both UT and LT with a higher …

A simultaneous wireless information and power transfer (SWIPT)-assisted cognitive overlay-
based multiple input multiple output (MIMO) downlink (DL) cooperative relaying system has …

In overlay networks, the cognitive sender (CS) assists the primary transmitter (PT) by
broadcasting the superposed signal composed of both cognitive and primary information …

Due to the shortcomings of the standard bat algorithm (BA) for multi-parameter optimization,
an improved bat algorithm is proposed. The benchmark function test shows that the …

This paper investigates a nonlinear energy scavenging overlay network (NLESON) wherein
a primary source (PS) communicates with a primary destination (PD) probably under aid of a …

This paper studies the problem of joint relay selection and power allocation (J-RS-PA) for
non-orthogonal multiple-access (NOMA)-based multicast cognitive radio networks with …

In this paper, we propose a security-aware spectrum sharing scheme for wireless-powered
cognitive radio networks (CRNs) with non-orthogonal multiple access (NOMA). In this …

Due to the shortage of spectrum resources, a nonorthogonal multiple access‐(NOMA‐)
based overlay cognitive integrated satellite‐terrestrial relay network is established in this …

This article investigates the outage performance of incremental relaying based energy
harvesting non‐orthogonal multiple access (IR‐EH‐NOMA) system. Firstly, we describe the …