Blind Signal Reception in Downlink Generalized Spatial Modulation Multiuser MIMO System Based on Minimum Output Energy  

作　　者：Wei-Chiang WU 

机构地区：[1]College of Mechanical and Electrical Engineering,Sanming University,Sanming 365004,China

出　　处：《Chinese Journal of Electronics》2024年第2期504-515,共12页电子学报（英文版）

摘　　要：This paper considers downlink multiuser multiple-input-multiple-output system with parallel spatial modulation scheme,in which base station transmitter antennas are separated into K groups corresponding to K user terminals.Generalized spatial modulation is employed,in which a subset(more than single antenna)of transmit antenna array are activated and the activating pattern corresponds to specific spatial symbol.Different from existing precoding-based algorithms,we develop a two-stage detection scheme at each user terminal:In the pre-processing stage,a minimax algorithm is proposed to identify the indices of active antennas,where the key idea is that the minimum output energy of the detector is maximized;A constrained minimum output energy algorithm is proposed in the post-processing stage to mitigate multiuser interference and extract temporal symbols.Compared with existing precoding-based algorithms,the complexity is significantly reduced.Moreover,the proposed algorithm is semi-blind,in which only a small subset of channel state information is required to identify active antennas as well as eliminate multiuser interference.Simulation results demonstrate that the proposed algorithm is near-far resistant and the spectral efficiency is extensively increased compared to the conventional spatial modulation scheme.

关 键 词：Generalized spatial modulation Multiuser multiple-input-multiple-output Multiuser interference Minimum output energy Minimax. 

分 类 号：TN929.5[电子电信—通信与信息系统] TN911.3[电子电信—信息与通信工程]