摘要
随着第五代(5G)移动通信中对用户数据率,接入量和能效的不断增长的更高需求,非正交多址接入(NOMA)技术因其在频谱方面的优势而备受关注。为了提高NOMA系统的并发用户量以及降低系统能耗,面向单小区多用户混合NOMA(H-NOMA)系统的上行功率最小化问题,研究了用户分组方案的优化,提出了联合功率分配的最优分组算法以及基于上行传输信道特性的启发式分组算法,以及组内的最优解调顺序。在功率控制中,基于最小数据率约束推导了组内最小功率的闭式解。仿真结果证明,所提出的优化方案在能耗和能效等方面均能达到较高的性能。
With the increasing high demand for user data rate,massive access and energy efficiency in the fifth generation(5G) mobile communication,the Non-Orthogonal Multiple Access(NOMA) technique has received great attention because of its advantages in spectrum efficiency.In order to increase the user access and reduce network power consumption of the NOMA system,the problem of uplink user grouping and power minimization in a single-cell multi-user Hybrid NOMA( H-NOMA) system is studied. For the user grouping,an optimal grouping algorithm of joint power allocation and a heuristic grouping algorithm based on the characteristic of the uplink transmission channel are proposed. And the optimal decoding order within the group is also proposed. For the power control,a closed-form solution of the minimum power within the group is obtained based on the minimum data rate constraint. Simulation results prove that the proposed schemes can achieve higher performance in terms of power consumption and energy efficiency.
作者
张军霞
程慈航
张天壮
ZHANG Junxia;CHENG Cihang;ZHANG Tianzhuang(School of Computer and Information Technology,Beijing Key Lab.of Transportation Data Analysis and Mining,Bejing Jiaotong University,Beijing 100044)
出处
《现代计算机》
2021年第22期47-54,共8页
Modern Computer
基金
国家自然科学基金(No.61971029)。
关键词
上行NOMA系统
用户分组
解调顺序
功率分配
Uplink Non-Orthogonal Multiple Access(NOMA)System
User Grouping
Decoding Order
Power Control
