Reconfigurable intelligent surface-empowered communication (RIS) and sparse code multiple access (SCMA) are promising candidates for future generations of wireless networks. The former enhances the transmission environments, whereas latter provides a high spectral efficiency transmission. This letter proposes, first time, low-cost design RIS-assisted uplink SCMA (SCMA-RIS) scheme to improve con...

Being an effective non-orthogonal multiple access (NOMA) technique, sparse code multiple access (SCMA) is promising for future wireless communication. Compared with orthogonal techniques, SCMA enjoys higher overloading tolerance and lower complexity because of its sparsity. In this paper, based on deterministic message passing algorithm (DMPA), algorithmic simplifications such as domain changin...

This paper is focused on code-domain non-orthogonal multiple access (CD-NOMA), which an emerging paradigm to support massive connectivity for future machine-type wireless networks. We take a comparative approach study two types of overloaded CD-NOMA, i.e., sparse code (SCMA) and dense (DCMA), are distinctive from each other in terms their codebooks having sparsity or not. By analysing individua...

Abstract Sparse Code Multiple Access (SCMA) is one of Non Orthogonal (NOMA) candidates for 5G, the fifth generation mobile network. overlapped blocks SCMA code are transmitted per frequency layer which compels receiver to cancel unwanted blocks. Thanks sparsity SCMA, Message Passing Algorithm (MPA) achieves near-optimal performance. Nevertheless, this process time-consuming and has a high degre...

This project is the outgrowth of the Enhanced AHEC Academic Community Partnership for Health Professions Workforce and Educational Reform. The Enhanced AHEC project has involved faculty from MUSC, USC, Greenville University Center, technical education institutions, the AHEC system, representatives from the State Budget and Control Board, the Commission on Higher Education, DHEC, DHHS, SCMA, SCH...

The joint transmission scheme of polar codes and sparse code multiple access (SCMA) has been regarded as a promising technology for future wireless communication systems. However, most the existing polar-coded SCMA (PC-SCMA) systems suffer from high latency caused by feedback iteration list decoding. In addition, error performance PC-SCMA is unsatisfactory ultra-reliable transmission. Inspired ...

For improving the throughput while simultaneously enhancing security in aeronautical ad-hoc networking (AANET), a channel quality indicator (CQI)-mapped spatially modulated sparse code multiple access (SM-SCMA) scheme is proposed this paper. On one hand, we exploit joint benefits of spatial mod...

Sparse code multiple access (SCMA) is one of the promising schemes to meet high connectivity and spectral efficiency in future wireless networks. The iterative detectors, for example message passing algorithm (MPA), can provide near optimal multiuser detection (MUD) performance but becomes infeasible when codebook size large or overloading factor high. Recently, sphere decoding (SD) has been co...

Sparse code multiple access (SCMA) is a multi-dimensional codebook based on class of non-orthogonal (NOMA) technologies enabling the delivery resource elements to numerous users in 5G wireless communications without increasing complexity. This paper proposes computer-generated sparse (CG-SCMA) technique, where minimum Euclidian distance (MED) star 16-point quadrature amplitude modulation maximi...

Well-separated pair decomposition, introduced by Callahan and Kosaraju [3], has found numerous applications in solving proximity problems for points in the Euclidean space. A pair of point sets (A, B) is c-well-separated if the distance between A,B is at least c times the diameters of both A and B. A well-separated pair decomposition of a point set consists of a set of well-separated pairs that...