时延约束多载波系统中多用户分集性能  

On the Performance of Multiuser Diversity in Multicarrier Systems with Delay-Constraints

作　　者：段世平[1] 徐友云[2] 宋文涛[1] 罗汉文[1] 

机构地区：[1]上海交通大学电子工程系,上海200030 [2]解放军理工大学通信工程学院,南京210007

出　　处：《上海交通大学学报》2004年第2期224-228,共5页Journal of Shanghai Jiaotong University

基　　金：国家高技术研究发展计划(863)项目(2001AA123014)

摘　　要：多用户分集是最近多用户信息理论确定的无线通信网络中固有的分集方式,它在不考虑单独用户数据速率和时延约束情况下可以达到系统容量最大化.为此,提出一种用于多载波系统的基于并行无线调度策略和注水算法,并满足明确服务质量参数约束的多用户分集算法,分析了时延约束条件下多载波系统中多用户分集性能.仿真结果表明,算法相对固定分配资源和单用户最优资源分配的多载波系统可以获得显著的系统容量增益.Multiuser diversity, identified by recent informationtheoretic results, is a form of diversity inherent in wireless communication networks and can maximize the system capacity regardless of respective user data rate and delay-constraints. A multiuser diversity algorithm based on parallel wireless scheduling and power water-filling was proposed in a multicarrier system. The algorithm satisfies explicit quality of service (QoS) constraints. The performance of multiuser diversity in the multicarrier systems with delay-constraints was analyzed. From the simulation results, the algorithm provides significant capacity gain under explicit QoS constraints in multicarrier systems.

关 键 词：多载波系统 多用户分集 无线资源管理 无线调度 

分 类 号：TN929.5[电子电信—通信与信息系统]