OFDMA中继系统下行链路资源分配算法研究  

Study of Resource Allocation Algorithm for Downlink Channel in OFDMA Relay System

作　　者：黄高飞[1] 郑晖[1] 唐冬[1] 

机构地区：[1]广州大学机械与电气工程学院电子信息工程系,广州510006

出　　处：《系统仿真学报》2012年第11期2314-2318,共5页Journal of System Simulation

基　　金：广州市科技计划(2009J1-C421-2);广州市教育局科技计划(08C061)

摘　　要：为了满足用户最小速率要求,提高OFDMA中继系统下行链路的和速率容量,在适用于TDMA和CDMA系统的M-LWDF资源分配算法基础上,提出了一种基于信道和缓冲队列状态信息的OFDMA中继系统资源分配算法。该算法同时考虑了各用户的信道状态和数据流的突发性,相对于现有算法,提出的新算法使OFDMA中继系统中断概率最小化的同时,可以获得更大的系统和速率容量。数值仿真结果也证明了上述结论。To improve the sum-rate capacity with the constraint of minimum rate requirement of the users for the downlink channel of OFDMA relay system, a resource allocation scheme utilizing the Channel State Information （CSI） and Buffer State Information （BSI ）was proposed based on the M-LWDF algorithm, which was applied to TDMA and CDMA cellular system. Because both the channel state and the bursty traffic of the users are considered in the resource allocation scheme, the larger sum-rate capacity was achieved while the outage was minimized when compared to the existing schemes. The numeric simulation results also justify the conclusion.

关 键 词：正交频分多址接入(OFDMA) 中继 资源分配 M-LWDF 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]