In this article, a novel two-phase transmission protocol is proposed to help the bidirectional
transmission in a user-aid two-way cooperative nonorthogonal multiple access system …

Non-Orthogonal multiple access (NOMA) holds promise as a spectrally efficient multiple
access scheme for 5G communication networks. This work investigates the performance of …

Non-orthogonal multiple access (NOMA) is one of the promising radio access techniques in
5G communication networks. In this paper, a cooperative NOMA relaying scheme with two …

In this paper, we study resource allocation problems for a two-tier cognitive heterogeneous
network in interweave spectrum sharing mode. Secondary users (SUs) in small cells (SCs) …

To further improve spectral efficiency, this paper considers a non-orthogonal multiple access
(NOMA)-assisted overlay cognitive radio network consisting of a pair of primary users and a …

Non-orthogonal multiple access (NOMA) is a promising spectrally-efficient technology to
satisfy the massive data requirement of the next-generation wireless communication …

In this paper, a novel full-duplex cooperative non-orthogonal multiple access (FD CNOMA)
system is proposed, where users intend to exchange messages with the assistance of a …

The fifth generation (5G) wireless communication systems promise to provide massive
connectivity over the limited available spectrum. Various new transmission paradigms such …

This paper addresses the power allocation issue in non-orthogonal multiple access (NOMA)
systems. In NOMA, multiple paired users can simultaneously utilize the frequency bands of …

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) …