基于Dinkelbach-Quadratic算法的高速铁路通信能效优化功率分配研究  

Research on Energy⁃efficient Optimized Power Allocation Based on Dinkelbach⁃Quadratic Algorithm in High⁃speed Railway Communication

作　　者：高云波[1] 李翠然[2] 王国荣 李茂青[1] GAO Yunbo;LI Cuiran;WANG Guorong;LI Maoqing(School of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;School of Electronic and Information Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Automated Information Design Institute,China Railway Electrification Survey Design&Research Institute Co.,Ltd.,Tianjin 300250,China)

机构地区：[1]兰州交通大学自动化与电气工程学院,甘肃兰州730070 [2]兰州交通大学电子与信息工程学院,甘肃兰州730070 [3]中铁电气化勘测设计研究院有限公司自动化信息设计所,天津300250

出　　处：《铁道学报》2024年第9期69-75,共7页Journal of the China Railway Society

基　　金：国家自然科学基金(62161016,52167013);兰州交通大学-天津大学联合创新基金(2022064)。

摘　　要：为了提高高速铁路通信能量效率,提出一种基于Dinkelbach-Quadratic变换的迭代算法来解决高速铁路通信下行链路的功率分配问题。通过在小区内部署远程天线单元构建高速铁路通信分布式天线系统模型,基于完美信道状态信息(CSI)和列车内接入点反馈的最小速率要求建立能效优化模型;基于所建立的非凸优化模型,采用Dinkelbach变换将分数形式的非线性规划问题转换为求差形式;利用Quadratic变换特性对目标函数进一步展开;采用交替迭代的方法完成能效最优的功率分配。仿真结果表明:所提算法在满足最小传输速率和最大发射功率的同时,可以兼顾系统能量效率和频谱效率;随着发射天线数量和接收中继数量的增加,系统性能也有明显提升,相比传统算法系统的能效和频谱效率至少提升5%。In order to improve the energy efficiency of high-speed railway communication,an iterative algorithm based on Dinkelbach-Quadratic transform was proposed to solve the power allocation problem of high-speed railway communica-tion downlink.Firstly,with the distributed antenna system model of high-speed railway communication being constructed by deploying remote antenna units in the cell,the energy efficiency optimization model was established based on perfect channel state information(CSI)and the minimum rate requirement of access point feedback in the train.Secondly,based on the established non-convex optimization model,the Dinkelbach transformation was used to transform the frac-tional nonlinear programming problem into a difference form.Finally,with the objective function further expanded by u-sing the Quadratic transformation characteristics,the optimal energy-efficient power allocation was completed by alterna-ting iteration.The simulation results show that the proposed algorithm can take into account the system energy efficiency and spectrum efficiency while satisfying the minimum transmission rate and maximum transmission power.With the in-crease of the number of transmitting antennas and the number of receiving relays,the system performance was also signif-icantly improved,with an enhancement of energy efficiency and spectrum efficiency performance by at least 5%,com-pared with traditional algorithm system.

关 键 词：高速铁路 分布式天线系统 功率分配 能量效率 分式规划 

分 类 号：U285.21[交通运输工程—交通信息工程及控制]