摘要
在多用户正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)系统中,系统容量和用户公平性不能同时兼顾,本文提出了一种综合考虑系统容量和用户公平性的资源分配算法.该算法利用多用户的分集增益,根据用户的实时信道状态和传输速率要求,合理的选择用户接入的时刻,既保证了用户公平性又提高了系统容量,达到时频二维空间优化系统的效果.仿真结果表明,本算法在不增加算法复杂度和不损失用户公平性的前提下,有效的提高了系统容量.
In the multiuser orthogonal frequency division multiplexing( OFDM) system, system capacity and fairness can not be simultaneously achieved in general. A novel resource allocation algorithm, which jointly considers the system capacity and fairhess,is proposed in this paper.Based on each user's real-time channel state information( CSI)and required data rate, the proposed algorithm makes full use of multiuser diversity to maximize the system capacity and guarantee the fairness by choosing suitable access time, and achieved the purpose of optimizing system in both time and frequency domains. Simulation results indicate that the proposed algorithm can effectively increase the system capacity without increasing the algorithm complexity and losing the fairness among users.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2007年第B06期64-68,共5页
Acta Electronica Sinica
基金
国家杰出青年科学基金(No.60725105)
国家自然科学基金重大项目(No.60496316)
国家自然科学基金(No.60572146)
高等学校博士学科点专项科研基金(No.20050701007)
高等学校优秀青年教师教学科研奖励计划
教育部科学技术研究重点项目(No.107103)