A two-way relay non-orthogonal multiple access (TWR-NOMA) system is investigated, where
two groups of NOMA users exchange messages with the aid of one half-duplex decode-and …

Non-orthogonal multiple access (NOMA) aims to increase the spectral efficiency of fifth
generation networks by relaxing the orthogonal use of radio-resources. In this paper, a …

In this paper, a two-stage superposed transmission scheme for cooperative nonorthogonal
multiple access (NOMA) systems is proposed. During the first N time slots, the source …

Due to the increasing number of devices to be connected in fifth-generation (5G) and
Internet of Things (IoT) networks, spectrum efficiency becomes a very challenging issue …

In the next generation of mobile communication networks, unprecedented challenges are
required to be met, such as much higher data rates and spectrum efficiency, lower latency …

The potential of the Non-Orthogonal Multiple Access (NOMA) approach for wireless
communications in the fifth generation (5G) and beyond can not be underestimated. This is …

This paper investigates a multi-hop decode-and-forward (DF) relay-aided non-orthogonal
multiple access (MH-DF-R-NOMA) scheme. The model overcomes the problems associated …

In conventional cooperative non-orthogonal multiple access (NOMA) networks, spectral
efficiency loss occurs due to a half-duplex constraint. To address this issue, we propose an …

This paper studies a FD cooperative non-orthogonal multiple access (NOMA) system in
terms of pairwise error probability (PEP) while considering imperfect successive interference …

This letter proposes an orthogonal time frequency space (OTFS) modulation based non-
orthogonal multiple access (NOMA) scheme for the coordinated direct and relay …