时延约束多载波系统中多用户分集性能

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。

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

Multiuser diversity, identified by recent information-theoretic 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 new 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.