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.
杜洋,董彬虹,王显俊,党冠斌,高鹏宇. 基于串行策略的SCMA多用户检测算法[J]. 电子与信息学报, 2016, 38(8): 1888-1893.
DU Yang, DONG Binhong, WANG Xianjun, DANG Guanbin, GAO Pengyu. Multiuser Detection Scheme for SCMA Systems Based on Serial Strategy. JEIT, 2016, 38(8): 1888-1893.
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