Sparse code multiple access (SCMA) is a class of non-orthogonal multiple access (NOMA)
that is proposed to support uplink machine-type communication services. In an SCMA …

This paper investigates the impact of residual transceiver hardware impairments (RTHIs) on
cooperative non-orthogonal multiple access (NOMA) networks, where generic fading …

Non-orthogonal multiple access (NOMA) is one promising technology, which provides high
system capacity, low latency, and massive connectivity, to address several challenges in the …

Non-orthogonal multiple access (NOMA) continues to receive enormous attention as a
potential technique for improving the spectral efficiency (SE) of wireless networks. Although …

Non-orthogonal multiple access (NOMA)-based cognitive radio (CR) networks have recently
emerged as a promising solution to enhance the spectral efficiency and massive …

This paper provides a comprehensive survey of the impact of the emerging communication
technique, non-orthogonal multiple access (NOMA), on future wireless networks …

In this paper, a novel codebook design method for sparse code multiple access (SCMA) is
proposed and an analytical framework to evaluate the bit error rate (BER) performance is …

Sparse code multiple access (SCMA) is a promising non-orthogonal air-interface technology
for its ability to support massive connections. In this paper, we design the multiuser …

To enable ultrareliable and low-latency communications (URLLCs) in the Internet of Things
(IoT), a sparse-code multiple-access (SCMA)-enhanced full-duplex (FD) scheme (FD …

This article investigates the application of reconfigurable intelligent surface (RIS) to assist a
unified non-orthogonal multiple access (RIS-U-NOMA) framework. More specifically, the …