下行链路MUs-MISO系统URLLC的求和传输率最大化波束形成优化研究  

The Research on Sum-Rate Maximization for Downlink MUs-MISO URLLC System

作　　者：曾陈萍 石荞语 叶长青 ZENG Chenping;SHI Qiaoyu;YE Changqing(School of Information Technology,Xichang University,Xichang,Sichuan 615000,China;Climate Center of Sichuan Province,Chengdu,Sichuan 610072,China)

机构地区：[1]西昌学院信息技术学院,四川西昌615000 [2]四川省气候中心,四川成都610072

出　　处：《西昌学院学报（自然科学版）》2023年第4期55-61,共7页Journal of Xichang University(Natural Science Edition)

基　　金：凉山州技术研究开发与推广应用项目(19YYJS0034)。

摘　　要：研究了一个下行链路多用户(multi-users,MUs)多输入单输出(multiple-input single-output,MISO)超可靠低时延通信(ultra-reliable low latency communication,URLLC)系统。首先,以最大化系统的求和传输速率为目标,提出了基站(base sta⁃tion,BS)波束形成的设计优化问题;其次,该设计被公式化为一个非凸优化问题,提出了一种计算高效的逐次凸近似(succes⁃sive convex approximation,SCA)迭代算法来获得该问题的次优解;最后,在不同发射总功率、BS端天线数、传输带宽和传输时间下,通过广泛的仿真分析了该算法的性能。仿真结果表明:所提算法的性能逼近于Shannon传输率。This paper presents our studies on a downlink MUs-MISO URLLC system.First,we propose the problem of op⁃timization design of beamforming at the BS for maximizing the sum-rate.Next,the design is formulated as a non-convex optimization problem,and we propose a computationally-efficient SCA-based iterative algorithm to obtain a suboptimal solution to the design problem.Finally,the performance of the proposed algorithms is analyzed through extensive simula⁃tions under various settings of transmit power budget,number of transmit antennas at the BS,transmit bandwidth,and transmit time.The simulation results show that the performance of our proposed algorithm approximates the Shannon transmission rate.

关 键 词：多用户 多输入单输出 超可靠低时延通信 波束成形 逐次凸近似 

分 类 号：TN929.533[电子电信—通信与信息系统]