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 the throughput of a non-orthogonal multiple access (NOMA)-based
cognitive radio (CR) system with multiple unmanned aerial vehicle (UAV)-assisted relays …

The security energy efficiency (SEE) is investigated in a two way-full duplex (TW-FD) relay
assisted cognitive radio non-orthogonal multiple access (CR-NOMA) networks. In order to …

In this paper, we propose a spectrum-sharing protocol for a cooperative cognitive radio
network based on non-orthogonal multiple access technology, where the base station (BS) …

Cognitive radio (CR) and non-orthogonal multiple access (NOMA) have been deemed two
promising technologies due to their potential to achieve a high spectral efficiency and …

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 …

This paper proposes a system EE (energy efficiency) optimization algorithm based on OPS
(On‐off Power Splitting) strategy for SWIPT (Simultaneous Wireless Information and Power …

Energy Efficiency (EE) is a significant problem for Cognitive Radio (CR) network. Recently,
more interest has focused on EE optimization problem in wireless-powered communication …

In this paper, we examine non-orthogonal multiple access (NOMA) and relay selection
strategy to benefit extra advantage from traditional cognitive radio (CR) relaying systems …

Improving spectral efficiency under a certain energy limitation is an important design metric
for future wireless communications as a response to the growing transmission demand of …