多用户间干扰下IRS辅助毫米波波束赋形研究  

Research on IRS-Assisted Millimeter-Wave Beamforming under Multi-User Interference

作　　者：柳翠 李俊萌 芮贤义[1] LIU Cui;LI Junmeng;RUI Xianyi(School of Electronic and Information Engineering,Soochow University,Suzhou Jiangsu 215006,China)

机构地区：[1]苏州大学电子信息学院,江苏苏州215006

出　　处：《通信技术》2023年第6期696-702,共7页Communications Technology

基　　金：国家自然科学基金(61201213,62071319)。

摘　　要：为解决IRS辅助毫米波通信系统中的干扰问题,提出了一种基于最大化系统总传输速率的联合波束赋形方案。该方案采用分数规划和二次型变换等技术,通过交替优化算法进行连续相移的联合波束赋形设计。针对实际硬件实现中的反射相移离散问题,进一步提出了一种离散相移的交替优化算法。仿真结果表明,该算法能够有效提高系统总传输速率,并且离散相移方案的总传输速率与连续相移方案趋近。A joint beamforming scheme based on maximizing the total transmission rate of the system is proposed to address interference issues in IRS-assisted millimeter-wave communication systems.The scheme utilizes techniques such as fractional programming and quadratic transformation,and it achieves a joint beamforming design with continuous phase shifts through an alternating optimization algorithm.Furthermore,a discrete phase shift alternating optimization algorithm is proposed to address the problem of the discreteness of phase shifts in practical hardware implementation of the IRS.Simulation results indicate that the proposed algorithm can effectively improve the total transmission rate of the system,and the total transmission rate of the discrete phase shift scheme approaches that of the continuous phase shift scheme.

关 键 词：智能反射面 毫米波通信 分数规划 交替优化算法 联合波束赋形 

分 类 号：TN925[电子电信—通信与信息系统]