Reconfigurable Intelligent Surface-Assisted Uplink Sparse Code Multiple Access

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 the latter provides a high spectral efficiency transmission. This l...

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Published in:IEEE communications letters Vol. 25; no. 6; pp. 2058 - 2062
Main Authors: Al-Nahhal, Ibrahim, Dobre, Octavia A., Basar, Ertugrul
Format: Journal Article
Language:English
Published: New York IEEE 01.06.2021
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Algorithms
Bit error rate
Complexity
Complexity theory
Decoding
Iterative decoding
low-complexity decoder
Maximum likelihood decoding
Message passing
message passing algorithm (MPA)
Multiple access
NOMA
Receivers
reconfigurable intelligent surface (RIS)
Reconfigurable intelligent surfaces
Sparse code multiple access (SCMA)
Uplink
Wireless networks
ISSN:1089-7798, 1558-2558
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Abstract 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 the latter provides a high spectral efficiency transmission. This letter proposes, for the first time, a low-cost design for RIS-assisted uplink SCMA (SCMA-RIS) scheme to improve the conventional SCMA spectrum efficiency. The message passing algorithm (MPA) is utilized and modified to decode the SCMA-RIS transmitted signals. Moreover, a low-complexity decoder for the SCMA-RIS scheme is proposed to significantly reduce the MPA decoding complexity and improve the bit error rate performance of the conventional SCMA. Monte Carlo simulations and complexity analysis are presented, which support the findings.
AbstractList 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 the latter provides a high spectral efficiency transmission. This letter proposes, for the first time, a low-cost design for RIS-assisted uplink SCMA (SCMA-RIS) scheme to improve the conventional SCMA spectrum efficiency. The message passing algorithm (MPA) is utilized and modified to decode the SCMA-RIS transmitted signals. Moreover, a low-complexity decoder for the SCMA-RIS scheme is proposed to significantly reduce the MPA decoding complexity and improve the bit error rate performance of the conventional SCMA. Monte Carlo simulations and complexity analysis are presented, which support the findings.
Author Dobre, Octavia A.
Al-Nahhal, Ibrahim
Basar, Ertugrul
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  surname: Basar
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SubjectTerms Algorithms
Bit error rate
Complexity
Complexity theory
Decoding
Iterative decoding
low-complexity decoder
Maximum likelihood decoding
Message passing
message passing algorithm (MPA)
Multiple access
NOMA
Receivers
reconfigurable intelligent surface (RIS)
Reconfigurable intelligent surfaces
Sparse code multiple access (SCMA)
Uplink
Wireless networks
Title Reconfigurable Intelligent Surface-Assisted Uplink Sparse Code Multiple Access
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https://www.proquest.com/docview/2539351669
Volume 25
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