摘要
针对大规模机器类型通信零星突发场景,提出了一种基于分组序列码本和压缩感知的大规模无源多址方案。首先,设计了基于特定移位模式的大容量扩展码本生成方案,以扩展码本空间;然后,将上行信号的稀疏结构与多载波技术结合,支持多用户数据在部分子载波上重叠传输,以提高频谱效率;最后,建立了多载波CS-MUD模型,设计了基于码本序列块的组正交匹配追踪算法完成活动用户及其上行数据的联合检测。仿真结果表明,所提方案能够有效降低大规模随机接入的误码率。
A massive unsourced multiple access scheme based on block sequence codebook and compressed sensing was proposed for sporadic burst scenario in massive machine type communication(mMTC).Firstly,a large-capacity spread-ing codebook generation scheme was designed according to a specific shift pattern,thus the codebook space was ex-panded.Secondly,the sparse structure of uplink signal was combined with multi-carrier technology to support overlap-ping transmission of multi-user data on some subcarriers,thus the spectral efficiency was improved.Finally,a mul-ti-carrier CS-MUD model was established,and a group orthogonal matching pursuit algorithm based on codebook se-quence blocks was designed to achieve the joint detection of active users and their uplink data.Simulation results show that the proposed scheme can effectively reduce the bit error rate of massive random access.
作者
张晶
马林
梁楚龙
高宏旭
ZHANG Jing;MA Lin;LIANG Chulong;GAO Hongxu(School of Communication and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;Jiangsu Province Key Lab of Wireless Communications,Nanjing 210003,China;ZTE Co.,Ltd.,Shenzhen 518055,China;China Post Construction Technology Co.,Ltd.,Nanjing 210012,China)
出处
《通信学报》
EI
CSCD
北大核心
2023年第12期171-180,共10页
Journal on Communications
基金
国家重点研发计划基金资助项目(No.2020YFB1807202)
国家自然科学基金资助项目(No.92067201)
江苏省重点研发计划基金资助项目(No.BE2020084-1)。