Power Allocation for SE Maximization in Uplink Massive MIMO System Under Minimum Rate Constraint  

作　　者：Wang Hui Yu Xiangbin Liu Fuyuan Bai Jiawei 

机构地区：[1]College of Electronic and Information Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China [2]Key Laboratory of Wireless Sensor Network and Communication,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China

出　　处：《China Communications》2024年第3期104-117,共14页中国通信（英文版）

基　　金：supported by the Fundamental Research Funds for the Central Universities of NUAA(No.kfjj20200414);Natural Science Foundation of Jiangsu Province in China(No.BK20181289).

摘　　要：In this paper,we optimize the spectrum efficiency(SE)of uplink massive multiple-input multiple-output(MIMO)system with imperfect channel state information(CSI)over Rayleigh fading channel.The SE optimization problem is formulated under the constraints of maximum power and minimum rate of each user.Then,we develop a near-optimal power allocation(PA)scheme by using the successive convex approximation(SCA)method,Lagrange multiplier method,and block coordinate descent(BCD)method,and it can obtain almost the same SE as the benchmark scheme with lower complexity.Since this scheme needs three-layer iteration,a suboptimal PA scheme is developed to further reduce the complexity,where the characteristic of massive MIMO(i.e.,numerous receive antennas)is utilized for convex reformulation,and the rate constraint is converted to linear constraints.This suboptimal scheme only needs single-layer iteration,thus has lower complexity than the near-optimal scheme.Finally,we joint design the pilot power and data power to further improve the performance,and propose an two-stage algorithm to obtain joint PA.Simulation results verify the effectiveness of the proposed schemes,and superior SE performance is achieved.

关 键 词：imperfect CSI massive MIMO minimum rate constraint power allocation spectral efficiency 

分 类 号：TN929.5[电子电信—通信与信息系统]