Sparse code multiple access asynchronous uplink multiuser detection algorithm

Yu, Qi-Yue, Li, Huan-Ying, Meng, Wei-Xiao, and Xiang, Wei (2019) Sparse code multiple access asynchronous uplink multiuser detection algorithm. IEEE Transactions on Vehicular Technology, 68 (6). pp. 5557-5564.

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Sparse code multiple access (SCMA) is one type of non-orthogonal multiple access techniques for the fifth-generation wireless communication networks. Existing multiuser detection algorithms for SCMA uplink systems are based on the assumption that signals are in synchronization. However, asynchrony cannot be neglected due to the propagation delays in practical environments. In this paper, we present three detection algorithms for uplink asynchronous SCMA systems, namely belief propagation message passing algorithm, belief propagation with equal gain combining message passing algorithm, and partial phase-coherent algorithms. Simulation results show that our proposed asynchronous detection algorithms are able to offer descent bit error rate performances, with only a small performances loss compared to the synchronous case. Moreover, our proposed algorithms converge well in the uplink asynchronous SCMA systems.

Item ID: 61796
Item Type: Article (Research - C1)
ISSN: 1939-9359
Keywords: asynchronous, message passing algorithm (MPA), multiuser detection algorithm, Sparse code multiple access (SCMA)
Copyright Information: © 2019 IEEE.
Funders: National Key Technology R&D Program of China
Projects and Grants: Grant no. 2018ZX03001002
Date Deposited: 20 May 2020 19:27
FoR Codes: 10 TECHNOLOGY > 1005 Communications Technologies > 100510 Wireless Communications @ 100%
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