串行干扰消除接收机下模式分割随机接入设计与分析  

Design and Analysis of Pattern Division Random Access with Successive Interference Cancellation Receivers

作　　者：庞立卓 闵洁 李佳慧 李倩倩 郝诗雅[1,2] 李林涛 戴晓明 PANG Lizhuo;MIN Jie;LI Jiahui;LI Qianqian;HAO Shiya;LI Lintao;DAI Xiaoming(School of Computer and Communication Engineering,University of Science and Technology Bejing,Beijing 100083,China;Shunde Innovation School,University of Science and Technology Beijing,Foshan 528399,China)

机构地区：[1]北京科技大学计算机与通信工程学院,北京100083 [2]北京科技大学顺德创新学院,广东佛山528399

出　　处：《移动通信》2024年第5期69-73,共5页Mobile Communications

基　　金：国家自然科学基金面上项目“大规模MIMO系统分布式基带信号检测理论与技术研究”(62371037);广东省基础与应用基础研究基金“有源RIS辅助NOMA网络物理层安全通信研究”(2022A12345);中国博士后科学基金资助项目“高速移动场景去蜂窝M-MIMO系统信号处理关键技术研究”(2023M740223);国家资助博士后研究人员计划“6G空天地一体化通信网络多维资源受限下新型多址接入与波形技术研究”(GZC20230241)。

摘　　要：利用模式域导频进行信道估计的PDRA框架可有效减轻机器类通信MTC背景下RA的导频碰撞问题。为进一步探索PDRA框架的潜能,将串行干扰消除SIC接收机与PDRA结合,利用SIC算法消除解码成功用户的模式域导频信号来降低干扰,从而缓解导频碰撞问题。仿真结果表明,与MF接收机下的PDRA方案相比,SIC接收机能进一步利用PDRA框架带来的潜在增益,呈现出更高的接入成功概率。The pattern division random access(PDRA)framework,utilizing pattern-domain pilots for channel estimation,effectively mitigates pilot contamination issues in machine-type communication under random access scenarios.To further explore the potential of the PDRA framework,a successive interference cancellation(SIC)receiver is integrated with PDRA.This integration employs the SIC algorithm to eliminate the pilot signals of successfully decoded users in the pattern domain,thereby reducing interference and alleviating pilot contamination issues.Simulation results demonstrate that,compared to the PDRA scheme with a matched filter receiver,the SIC receiver further capitalizes on the inherent advantages of the PDRA framework,resulting in a higher probability of successful access.

关 键 词：机器类通信 随机接入 导频碰撞 模式分割随机接入 串行干扰消除 

分 类 号：TN928[电子电信—通信与信息系统]