This paper investigates the physical layer security issue in an amplify-and-forward (AF) multi-
input multi-output (MIMO) two-way relay assisted cognitive radio (CR) nonorthogonal …

In this letter, the design of non-orthogonal multiple access (NOMA) beamforming is
investigated in a spatial division multiple access (SDMA) legacy system. In particular, two …

In this paper, we demonstrate that due to large variations in link signal-to-noise-ratios, the
key to good performance in underlay cooperative non-orthogonal multiple access (CNOMA) …

Cognitive Radio (CR) promises an efficient utilization of radio spectrum resources by
enabling dynamic spectrum access to overcome the spectrum scarcity problem. Cognitive …

The Industrial Internet of Things (IIoT) has been recognised as having the potential to benefit
a range of industrial sectors substantially. However, widespread development and …

This article investigates physical-layer security (PLS) for an energy-harvesting cognitive
network with nonorthogonal multiple access (EHCN-NOMA), where a cognitive base station …

Wireless channel estimation is one of the challenging problems in multiple input multiple
output orthogonal frequency division multiplexing (MIMO-OFDM) wireless systems. The …

The Industrial Internet of Things (IIoT) has been recognized as having the potential to offer
substantial benefit to a wide range of industrial sectors. However, the widespread …

With the rapid growth in the requirements of the Internet of Things (IoT), the scarcity of
spectrum resources is becoming serious. Non-orthogonal multiple access (NOMA) and …

This paper investigates the physical layer security (PLS) of non-orthogonal multiple access
(NOMA)-enabled overlay cognitive radio networks (NOMA-OCRNs), considering multiple …