一种低复杂度的MIMO-OFDMA下行链路资源分配方案  

Low complexity resource allocation scheme with fairness for MIMO-OFDMA downlink systems

作　　者：杜娜[1] 顾品标[2] 闵锐[2,3] 曹宁[1] 

机构地区：[1]河海大学计算机与信息学院,江苏南京210098 [2]东南大学信息科学与工程学院,江苏南京210096 [3]解放军理工大学理学院,江苏南京211101

出　　处：《系统工程与电子技术》2010年第3期463-468,共6页Systems Engineering and Electronics

摘　　要：针对MIMO-OFDMA下行链路系统,考虑在总功率和BER以及用户数据速率成比例的约束下,以获取整个系统吞吐量极大化为准则,提出一种基于成比例公平性约束的资源分配方案。该方案在子载波分配时,松弛成比例约束条件,使用户数据速率近似地成比例于每个用户分配的子载波数,在功率分配时,推导出一种线性的不需要迭代的低复杂度功率分配方案。仿真和分析表明,整个方案在保证系统吞吐量的前提下,取得了用户间良好的速率公平性,同时又具有较低的计算复杂度。This paper presents a new scheme based on proportional fairness for MIMO-OFDM downlink resource allocation,which considers allocation of subcarriers and power to each user to maximize the sum of user data rates,subject to constraints on total power,bit error rate,and proportionality among user data rates.A linear non-iterative power allocation method with low complexity is deduced by relaxation of strict user rate proportionality constraints.Simulation results show that this new adaptive allocation scheme can achieve good tradeoff between capacity and fairness as well as provide much better capacity gain than the conventional static TDMA allocation method,while requiring significantly less computation.

关 键 词：资源分配 多输入多输出 正交频分多址 注水算法 

分 类 号：TN911[电子电信—通信与信息系统]