稀疏码多址接入多用户检测算法综述  

Survey of Multi-user Detection Algorithms for Sparse Code Multiple Access System

作　　者：雷菁[1] 王水琴 黄巍 彭小洹 LEI Jing;WANG Shuiqin;HUANG Wei;PENG Xiaohuan(College of Electronic Science,National University of Defense Technology,Changsha 410073,China;The Second Military Representative Office in Chengdu of Army Equipment Department,Chengdu 610031,China)

机构地区：[1]国防科技大学电子科学学院,长沙410073 [2]陆装驻成都地区第二军代室,成都610031

出　　处：《电子与信息学报》2021年第10期2757-2770,共14页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61702536);湖南省自然科学基金(2018JJ3609)。

摘　　要：稀疏码多址接入(SCMA)是一种非正交多址接入技术,具备高频谱效率和大连接特性。多用户检测是SCMA系统的关键问题,而如何降低检测算法的复杂度成为多址接入领域的研究热点。该文从影响算法复杂度的不同因素入手,分类综述了现有多用户检测算法并对几种典型算法进行了原理剖析和性能对比。同时,指出了SCMA多用户检测算法的改进思路。最后总结并探讨了SCMA检测算法未来的发展趋势和面临的挑战。Sparse Code Multiple Access(SCMA)is a non-orthogonal multiple access scheme with high spectrum efficiency and massive connectivity.Multi-user detection is a key issue of SCMA system and how to reduce the complexity of detection algorithms has become a research hotspot in the field of multiple access.This paper reviews the existing multi-user detection algorithms from different factors that affect the complexity of the algorithms.Furthermore,the principle and performance of several typical multi-user detection algorithms are introduced and compared.In addition,the improved ideas of multi-user detection algorithms for SCMA system are pointed out in this paper.Finally,the future development trend and challenges of SCMA detection algorithms are summarized and discussed.

关 键 词：第6代移动通信 稀疏码多址接入 多用户检测 消息传递算法 

分 类 号：TN929.5[电子电信—通信与信息系统]