摘要
针对多用户正交频分复用(OFDM)自适应资源分配中用户公平性和系统容量的问题,本文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,首先确定每个用户需要的子载波数量,然后根据用户的速率比例继续分配子载波,最后分配剩余子载波。在功率分配中,通过人工蜂群(ABC)算法的全局搜索实现在所有用户之间的功率寻优,并利用等功率的分配方式对每个用户的子载波进行单用户功率分配。从仿真结果中可以看出,本文算法不仅可以兼顾用户的公平性,同时也有效地提高了系统的吞吐量,从而证明了本文算法的有效性。
To solve the problems of user fairness and system capacity in adaptive resource allocation for multi-user Orthogonal Frequency Division Multiplexing(OFDM),a scheme of combining subcarrier allocation and power allocation is proposed.In the subcarrier allocation,the number of subcarriers required by each user is determined first,then the subcarriers are continuously allocated according to the users’ rate proportionality,and finally the remaining subcarriers are allocated.In the power allocation,the power optimization among all users is achieved through global search using Artificial Bee Colony(ABC)algorithm,and the equal power allocation method is used to carry out single-user power allocation of subcarriers to each user.Simulation results show that the proposed scheme not only takes into account the user fairness,but also effectively improves the throughput of the system,thus proving the effectiveness of proposed scheme.
作者
袁建国
南蜀崇
张芳
王竟鑫
庞宇
YUAN Jian-guo;NAN Shu-chong;ZHANG Fang;WANG Jing-xin;PANG Yu(Chongqing Key Laboratory of Photoelectronic Information Sensing and Transmitting Technology,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2019年第2期624-630,共7页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金项目(61472464
61671091
61471075)
重庆市基础与前沿研究计划项目(csts2017jcyjAX0427)
关键词
通信技术
正交频分复用
自适应资源分配
子载波分配
功率分配
人工蜂群算法
communication technology
orthogonal frequency division multiplexing
adaptive resource allocation
subcarrier allocation
power allocation
artificial bee colony algorithm
