There is a huge demand for increased connectivity and reliability of devices in the fifth
generation and beyond of wireless communications so as to ensure massive connectivity …

In this paper, we study two transmission scenarios for the base station (BS) in cellular
networks to serve the far user, who is located at the cell-edge area in such a network. In …

This paper proposes a framework of users association and power allocation in the two-tier
heterogeneous networks with nonorthogonal multiple access (NOMA). Taking account of …

Non-orthogonal multiple access (NOMA) is an essential component of the 5G wireless
communications. Since NOMA adopts power domain for multiple access, the power …

Non-orthogonal multiple access (NOMA) has emerged as a significant technique for 5G
wireless networks because it increases device connectivity, spectral efficiency, and energy …

In recent years, green communications and networks have drawn increasing attention from
researchers and relevant industries owing to their economic and environmental benefits. In …

Non-orthogonal multiple access technique (NOMA) has appeared at the forefront as a viable
solution capable of improving spectral and energy efficiency in fifth-generation (5G) and …

The non-orthogonal multiple access (NOMA) scheme has proven to be a potential candidate
to enhance spectral potency and massive connectivity for 5G wireless networks. To achieve …

Reconfigurable intelligent surface (RIS) and non-orthogonal multiple access (NOMA) are
two promising technologies in future communication systems. The integration between RIS …

Non-orthogonal multiple access (NOMA) has recently been considered as a key enabling
technique for 5G cellular systems. In NOMA, by exploiting the channel gain differences …