Anti-interference Multiuser Detection Algorithm Based on Variable Step Size Adaptive Matching Pursuit in Grant-free NOMA System

The fifth generation mobile communication system（5G） uses non-orthogonal multiple access（NOMA） technology for non-orthogonal multiplexing of wireless communication resources, which improves the spectrum utilization efficiency and system capacity by the way of overload.The NOMA system uses the grant-...

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Bibliographic Details
Published inJi suan ji ke xue Vol. 50; no. 5; p. 322
Main Authors Li, Yuge, Wang, Tianjing, Shen, Hang, Luo, Xiaokang, Bai, Guangwei
Format Journal Article
LanguageChinese
Published Chongqing Guojia Kexue Jishu Bu 01.01.2023
Subjects
5G mobile communication
Algorithms
Bit error rate
Interference
Matched pursuit
Matching
Mobile communication systems
Multiplexing
Nonorthogonal multiple access
Overloading
Radio equipment
Wireless communications
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Summary:The fifth generation mobile communication system（5G） uses non-orthogonal multiple access（NOMA） technology for non-orthogonal multiplexing of wireless communication resources, which improves the spectrum utilization efficiency and system capacity by the way of overload.The NOMA system uses the grant-free mode to reduce the system flow and signaling overhead, but the receiver needs to perform multi-user detection.Based on the sparse characteristics of active users, the base station uses the compressed sensing（CS） reconstruction algorithm to recover the mixed sparse vectors of active users, and realizes efficient multi-user detection.The dense deployment of base stations in 5G network enhances the interferences among neighboring cells that increases the difficulty of CS-based detection and reduces the accuracy of detection.Aiming at the problem of interference in multi-user detection in the grant-free NOMA system, an anti-interference multiuser detection algorithm based on variable step size adaptive matching pu
ISSN:1002-137X