下行链路NOMA用户分组和功率分配算法  

OPTIMIZATION ALGORITHM FOR USER MATCHING AND POWER ALLOCATION OF NOMA IN DOWN LINK

作　　者：甄少华 马文平[1] 罗炼飞 Zhen Shaohua;Ma Wenping;Luo Lianfei(School of Telecommunication Engineering,Xidian University,Xi’an 710071,Shaanxi,China)

机构地区：[1]西安电子科技大学通信工程学院,陕西西安710071

出　　处：《计算机应用与软件》2022年第3期121-126,138,共7页Computer Applications and Software

基　　金：国家自然科学基金项目(61373171);国家重点研发计划项目(2017YFB0802400);高等学校创新引智计划项目(B08038)。

摘　　要：对下行链路中非正交多址接入(Non-Orthogonal Multiple Access,NOMA)系统用户匹配和子带功率分配两个问题进行研究。提出优化分组方案,结合用户质量及子带吞吐量进行用户匹配,从而保证系统性能显著提升;提出基于比例公平的优化边缘用户质量因子的功率分配方案,在保证用户服务质量(Quality of Service,QoS)基础上优化边缘用户的传输性能,并利用Karush-Kuhn-Tucker(KKT)条件进行求解。仿真结果表明,系统吞吐量比传统的正交多址接入(Orthogonal Multiple Access,OMA)系统有明显提升。The problems of user matching and sub-band power allocation for non-orthogonal multiple access(NOMA)systems in the downlink are studied.An optimized packetization scheme was proposed,and user matching was combined with user quality and subband throughput to ensure a significant improvement in system performance.A power allocation scheme for optimizing edge user quality factor based on a fair ratio was proposed to optimize the transmission of edge users while ensuring user QoS.The performance was solved by using Karush-Kuhn-Tucker condition.Simulation results show that the system throughput is significantly improved compared with the traditional orthogonal multiple access(OMA)system.

关 键 词：非正交多址接入 用户质量 功率分配 边缘用户 服务质量 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术] TN91[电子电信—通信与信息系统]