多用户大规模FD-MIMO下行系统中基于降维的仿射投影解码策略  

Affine Projection Decoding Strategy under Reduced Dimension in Multi-user Large-scale FD-MIMO Downlink Systems

作　　者：陈靖 戴谭明 吴君钦[1] CHEN Jing;DAI Tanming;WU Junqin(Jiangxi University of Science and Technology,Ganzhou Jiangxi 341000,China)

机构地区：[1]江西理工大学,江西赣州341000

出　　处：《通信技术》2022年第7期837-843,共7页Communications Technology

基　　金：江西省教育厅科技项目(GJJ200881)。

摘　　要：针对多用户大规模全维多输入多输出(Full-Dimention Multiple Input Multiple Output,FD-MIMO)下行系统,基站侧配备M根传送天线,用户侧仅有一根接收天线的场景,提出了基于降维矩阵与仿射投影相结合的解码策略。其中,基站侧引入的降维矩阵将大规模天线进行有效合并,可降低系统开销及解码复杂度,而仿射投影技术在用户端能充分利用对角空时码的特性,将用户间的干扰完全消除,进一步解出各个用户所需要的信息。此外,还提出了基于循环矩阵形式下的传送方案和解码方法,并基于提出的仿射投影解码策略,从理论维度上分析该系统的可达速率域和自由度。最后,对所提出的方案进行了仿真,其结果也与理论分析一致。For the multi-user large-scale FD-MIMO(Full-Dimension Multiple Input Multiple Output)downlink system,when the base station side is equipped with M transmitting antennas and the user side has only one receiving antenna,a decoding strategy based on the combination of dimension reduction matrix and affine projection is proposed.In this paper,the dimensionality reduction matrix introduced at the base station side can effectively combine large-scale antennas,which can reduce the system overhead and decoding complexity,and the affine projection technology can make full use of the features of diagonal space-time codes at the user side,completely eliminates the interference among users,and further solves the information required by each user.In addition,a transmission scheme and decoding method based on cyclic matrix are also proposed,and based on the proposed affine projection decoding strategy,the reachable rate domain and degrees of freedom of the system are analyzed theoretically.Finally,the proposed scheme is simulated and the results are consistent with the theoretical analysis.

关 键 词：多用户 FD-MIMO系统 降维矩阵 仿射投影策略 循环传送 

分 类 号：TN914[电子电信—通信与信息系统]