基于串行策略的SCMA多用户检测算法

doi:10.11999/JEIT151259

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Abstract

Sparse Code Multiple Access (SCMA) is a promising air-interface technology for 5 G wireless communication networks, which can enable massive connectivity. The existing multiuser detection schemes are based on a parallel message updating for Message Passing Algorithm (MPA), thus it is not efficient in terms of convergence. In this paper, an efficient multiuser detection scheme for uplink SCMA is proposed based on serial updating of function nodes, messages. Compared to the existing detection schemes, the proposed scheme accelerates the convergence due to that the updated messages can join the belief propagation immediately in current iteration, which avoids being used in the next iteration. Furthermore, the proposed scheme can reduce the storage burden, which fuses message passing process on the basis of the relationship between messages. Numerical results show that the proposed scheme can offer a good trade-off between complexity and Bit Error Rate (BER) performance.

Key words： Sparse Code Multiple Access (SCMA) Multiuser detection Message Passing Algorithm (MPA) Serial updating

Received: 09 November 2015 Published: 25 May 2016

PACS:

TN929.5

Fund:

Huawei HIRP Project (YB2015040056), The National Natural Science Foundation of China (61201126), New Century Excellent Talents in University (NCET-11-0058), Sichuan Youth Science and Technology Fund (2012JQ0020), Open Research Fund of the National Laboratory (150C02006)

Corresponding Authors: DU Yang E-mail: yangdu1988@gmail.com

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	DU Yang
	DONG Binhong
	WANG Xianjun
	DANG Guanbin
	GAO Pengyu

Cite this article:

DU Yang,DONG Binhong,WANG Xianjun等. Multiuser Detection Scheme for SCMA Systems Based on Serial Strategy[J]. JEIT, 2016, 38(8): 1888-1893.

URL:

http://jeit.ie.ac.cn/EN/10.11999/JEIT151259 OR http://jeit.ie.ac.cn/EN/Y2016/V38/I8/1888

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