This paper proposes a novel hybrid downlinkuplink cooperative NOMA (HDU-CNOMA)
scheme to achieve a better tradeoff between spectral efficiency and signal reception …

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 …

Non-orthogonal multiple access (NOMA) is a promising spectrally-efficient multiple access
technique for the fifth generation (5G) wireless networks. In this paper, we propose a …

In this paper, a backscatter cooperation (BC) scheme is proposed for non-orthogonal
multiple access (NOMA) downlink transmission. The key idea is to backscatter the surplus …

In this paper, we investigate a coordinated direct and relay transmission for uplink (CDRT-
UL) of a cooperative non-orthogonal multiple access (NOMA) system, in which two users …

Non-orthogonal multiple access (NOMA) is a promising multiple access technique, which
exploits the power domain to enhance the spectral efficiency of the fifth generation (5G) …

This paper proposes a new communication protocol for a cooperative non-orthogonal
multiple access (NOMA) system. In this system, based on users' channel conditions, each …

In this paper, we propose a two-way cooperative relay scheme based on non-orthogonal
multiple access (NOMA) where bidirectional communication is supported for two users in …

In this paper, we propose bi-directional cooperative non-orthogonal multiple access
(NOMA). Compared to conventional NOMA, the main contributions of bi-directional …

This paper investigates a cooperative uplink system where two users wish to send
messages to a base station with the help of a buffer-aided relay. Transmission modes in …