Sparse or Dense: A Comparative Study of Code-Domain NOMA Systems

This paper is focused on code-domain non-orthogonal multiple access (CD-NOMA), which is an emerging paradigm to support massive connectivity for future machine-type wireless networks. We take a comparative approach to study two types of overloaded CD-NOMA, i.e., sparse code multiple access (SCMA) an...

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Bibliographic Details
Published in:	IEEE transactions on wireless communications Vol. 20; no. 8; pp. 4768 - 4780
Main Authors:	Liu, Zilong, Yang, Lie-Liang
Format:	Journal Article
Language:	English
Published:	New York IEEE 01.08.2021 The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:	Channels Comparative studies Decoding dense code multiple access (DCMA) Design criteria Domains Error analysis Fading low-density parity check (LDPC) code machine-type communications (MTC) massive connectivity message passing algorithm Multiaccess communication Multiuser detection Nodes NOMA Non-orthogonal multiple access (NOMA) Nonorthogonal multiple access Receivers sparse code multiple access (SCMA) Sparsity sphere decoding Subcarriers Uplink Wireless networks
ISSN:	1536-1276, 1558-2248
Online Access:	Get full text
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