电讯技术Issue(4)：424-429,6.DOI:10.3969/j.issn.1001-893x.2015.04.013
基于比例速率保证的信道误差OFDMA中继系统资源分配
Proportional Rate Constraint Resource Allocation for OFDMA Relay Systems with Channel Estimated Error
摘要
Abstract
This paper addresses joint relay selection,dynamic subcarrier allocation and power allocation in the presence of the outage probability,users’ quality of service ( QoS) requirement and proportional rate constraints,in orthogonal frequency division multiple access ( OFDMA ) relay systems with channel esti-mated error. A mathematical model for maximizing the sum rate is established. Moreover, in order to en-hance proportional fairness among users,this paper develops an optimal low complexity subcarrier assign-ment scheme to meet the minimum QoS requirement of each user firstly and allocates the excess subcarriers to maintain the proportional fairness. Simulation results show that the proposed algorithm improves the sys-tem performance significantly compared with the conventional schemes in terms of the outage probability, sum rate and fariness.关键词
正交频分多址/资源分配/信道估计误差/中断概率/中继选择/比例公平Key words
OFDMA/resource allocation/channel estimated error/outage probability/relay selection/pro-portional fairness分类
信息技术与安全科学引用本文复制引用
霍龙..基于比例速率保证的信道误差OFDMA中继系统资源分配[J].电讯技术,2015,(4):424-429,6.基金项目
国家高技术研究发展计划(863计划)项目(2014AA01A701)Foundation Item:The National High-tech R&D Program of China(863 Program)(2014AA01A701) （863计划）
