Improved MAX-Log MPA multiuser detection algorithm in SCMA system

Dianzi Jishu Yingyong

Ge Wenping¹  Wu Xiong¹  Dai Wenli¹  Zhang Xuewan¹ 

[1] College of Information Science and Engineering，Xinjiang University，Urumqi 830046，China;

关键词: 5G;    non-orthogonal multiple access;    SCMA;    multiuser detection;    MPA;   

DOI  :  10.16157/j.issn.0258-7998.173428

来源: DOAJ

【 摘 要 】

Sparse code multiple access(SCMA) is a novel non-orthogonal multiple access scheme to face the future 5G communication. In allusion to the problem that sparse code multiple access(SCMA) system based on a logarithm-domain MAX-Log message passing algorithm(MPA) for multiuser detection has lower detection performance, this paper adopts a method that the message updating formula of the resource node is multiplied by a factor, which can reduce the lost messages of the original MAX-Log MPA algorithm for approximate computing the updating message of resource node. The theory and simulation results show that the improved MAX-Log MPA multiuser detection algorithm can not only maintain the low complexity of the original MAX-Log MPA algorithm, but also obtains better detection performance.

【 授权许可】

Unknown