一种多用户MIMO/OFDMA系统的资源分配和调度方案

针对下行多用户多入多出／正交频分复用系统，提出了一种适合多业务类型的资源分配和调
度算法. 综合考虑了不同业务类型的服务质量需求，根据用户的信道条件、吞吐量和队列状
态确定调度优先级；结合用户信道的空间相关性进行用户选择、功率分配和比特加载. 通过
充分利用空、时、频多用户分集增益，在保证实时业务最小时延要求和非实时业务最小速率
要求的同时，最大化系统的吞吐量. 仿真结果说明，所提算法在系统吞吐量、丢包率及最
小速率满足率方面得到了改善.

A Radio Resource Allocation and Scheduling Scheme for Multi-User MIMO/OFDMA Systems

A radio resource allocation and scheduling algorithm for multi user MIMO/OFDMA systems is proposed to efficiently support the diverse quality of service (QoS) requirements of heterogeneous services. Firstly, the priority is given by taking into account QoS requirements, channel conditions, throughput, and queue state information. Then, the user selection on the same subcarrier based on the channe l correlation, power allocation, and bit loading are implemented. The algorithm aims to maximize the system throughput by fully exploiting multi user diversity gain in space, time, and frequency domain while guaranteeing the delay requirem ent for real time services and minimum rate requirement for non real time ser vices. The simulation results show that the proposed algorithm improves the syst em performance in terms of the system throughput, packet dropping probability, a nd the ratio of unsatisfied minimum data rate of non real time services.