This paper investigates the performance of an underlay cognitive hybrid satellite-terrestrial
network comprising a primary satellite source with its multiple terrestrial primary receivers …

Energy harvesting with cognitive radio and nonorthogonal multiple access (NOMA)
techniques offer a promising solution to enhance the spectral and energy efficiency in …

In this paper, we consider an underlay cognitive hybridsatellite-terrestrial network (CHSTN)
which constitutes a primary satellite source communicating with its multiple terrestrial …

Ambient backscatter communication (AmBC) is an emerging technology that has the
potential to offer spectral-and energy-efficient solutions for the next generation wireless …

We investigate physical-layer security for a multiuser underlay cognitive system with
hardware impairments (HIs) and channel estimation errors (CEEs), which comprises …

This article proposes a simultaneous wireless information and power transfer (SWIPT)-
enabled Internet of Things (IoT)-based cognitive nonorthogonal multiple access (NOMA) …

In this paper, we investigate the effectiveness of an overlay cognitive radio (OCR) coupled
with non-orthogonal multiple access (NOMA) system using a full-duplex (FD) cooperative …

The residual hardware impairments originating from transceiver hardware such as phase
noise, amplifier non-linearity, in-phase, and quadrature imbalances create distortion noises …

This work presents a novel nonorthogonal multiple access (NOMA) cognitive radio (CR)
system where the base station (BS) opportunistically multiplexes the secondary user (SU) …

With the rapid development of future wireless networks, device-to-device (D2D) technology
is widely used as the communication system in the Internet of Things (IoT) fifth generation …