基于分簇的多用户OFDM自适应资源分配方案  

Multi-user OFDM adaptive resource allocation research based on clustering idea

作　　者：高浩 李学华[1] 姚媛媛 Gao Hao;Li Xuehua;Yao Yuanyuan(School of Information&Communication Engineering,Beijing Information Science and Technology University,Beijing 100101,China)

机构地区：[1]北京信息科技大学信息与通信工程学院,北京100101

出　　处：《电子技术应用》2019年第3期63-66,75,共5页Application of Electronic Technique

基　　金：北京信息科技大学师资补充与支持计划项目(5111824101)

摘　　要：针对正交频分复用自适应资源分配中算法复杂度和系统容量的问题,提出了一种联合子载波分配和功率分配的方案。在子载波分配中,将频带内相邻的子载波合为子载波簇,对用户速率进行比例约束,根据预设的比例为用户分配子载波簇;在功率分配中,根据子载波分配完毕后的用户速率比例,为用户分配功率,再利用注水算法解决单用户下子载波的功率分配问题。仿真结果表明,所提出的方案不仅可以有效降低算法的复杂度,而且提高了系统容量,从而证明了方案的可行性。Aiming at the complexity and system capacity of orthogonal frequency division multiplexing adaptive resource allocation,this paper proposes a joint subcarrier allocation and power allocation scheme. In the subcarrier allocation, the adjacent subcarriers in the frequency band are combined into subcarrier clusters. The user rate is proportionally restricted, and the subcarriers clusters is assigned to user according to a preset ratio. In the power allocation, the power is allocated to the user according to the ratio of the user rate after the subcarriers are allocated, and then the water injection algorithm is used to solve the problem of subcarrier alloca-tion for single user. The simulation results show that the proposed scheme can not only effectively reduce the complexity of the al-gorithm, but also increase the system capacity, which proves the feasibility of the scheme.

关 键 词：正交频分复用 自适应资源分配 子载波簇 功率分配 

分 类 号：TN929.53[电子电信—通信与信息系统]