A low complexity detection algorithm for fixed up-link SCMA system in mission critical scenario

Jia, Min, Wang, Linfang, Guo, Qingjun, Gu, Xuemai, and Xiang, Wei (2018) A low complexity detection algorithm for fixed up-link SCMA system in mission critical scenario. IEEE Internet of Things Journal, 5 (5). pp. 3289-3297.

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Abstract

Sparse code multiple access (SCMA), as one of the most promising candidate techniques for the fifth generation communications system, is a nonorthogonal multiple access scheme which can provide large scale connections. Its philosophy is to map coded bits directly to multidimensional sparse codewords, and the message passing algorithm (MPA) is utilized to detect the multiuser signals. However, the relatively high computation of MPA detection may lower the performance when SCMA is implemented in practical applications. The partial marginalization MPA (PM-MPA) helps to reduce the computation of original MPA detection. In this paper, an improved detection scheme based on PM-MPA is proposed. Our analysis and simulation shows that compared with PM-MPA, the improved PM-MPA (IPM-MPA) can obtain a lower bit error ratio. Besides, the simulation also shows that, to achieve the same performance, the IPM-MPA is less complex than PM-MPA.

Item ID: 56502
Item Type: Article (Research - C1)
ISSN: 2327-4662
Keywords: Internet of Things (IoT), low complexity, message passing algorithm (MPA), sparse code multiple access (SCMA)
Copyright Information: © 2017 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. See http://www.ieee.org/publications_standards/publications/rights/index.html for more information.
Funders: National Natural Science Foundation of China (NSFC), Chinese Academy of Engineering (CAE), State Key Laboratory of Space-Ground Integrated Information Technology (SKL)
Projects and Grants: NSFC grant 61671183, NSFC grant 91438205, CAE grant 2016-ZD-05-07, SKL grant 2015_SGIIT_KFJJ_TX_02
Date Deposited: 05 Dec 2018 07:48
FoR Codes: 10 TECHNOLOGY > 1005 Communications Technologies > 100510 Wireless Communications @ 100%
SEO Codes: 89 INFORMATION AND COMMUNICATION SERVICES > 8901 Communication Networks and Services > 890103 Mobile Data Networks and Services @ 100%
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