Reconfigurable Intelligent Surface-Assisted Uplink Sparse Code Multiple Access

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type 01 Jun 2021Embargo end date: 01 Jan 2020 Turkey Publisher:Institute of Electrical and Electronics Engineers (IEEE)Journal:IEEE Communications Letters, volume 25, pages 2,058-2,062 (issn: 1089-7798, eissn: 2373-7891,

Copyright policy )Funded by:NSERC | unidentified

Authors: Ibrahim Al-Nahhal; Octavia A. Dobre; Ertugrul Basar;

doi: 10.1109/lcomm.2021.3058142 , 10.13140/rg.2.2.22208.76801 , 10.48550/arxiv.2011.09647

arXiv: 2011.09647

Reconfigurable Intelligent Surface-Assisted Uplink Sparse Code Multiple Access

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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, an 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.

5 pages, 5 figures, to be appeared on IEEE Communications Letters

Country

Turkey

Related Organizations

Memorial University of Newfoundland
Canada
Koç University
Turkey

Keywords

FOS: Computer and information sciences, Message passing algorithm (MPA), Complexity theory, Computer Science - Information Theory, Information Theory (cs.IT), Maximum likelihood decoding, NOMA, Computer Science - Emerging Technologies, Iterative decoding, Receivers, Emerging Technologies (cs.ET), Bit error rate, Reconfigurable intelligent surface (RIS), Telecommunications, Sparse code multiple access (SCMA), Low-complexity decoder, Complexity theory; Uplink; Bit error rate; Maximum likelihood decoding; Iterative decoding; Receivers; NOMA; Sparse code multiple access (SCMA); Reconfigurable intelligent surface (RIS); Message passing algorithm (MPA); Low-complexity decoder, Uplink

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