一种多天线多用户下行系统保障公平的资源分配策略

Resource Allocation Scheme with Guaranteed Fairness for Multiuser MIMO Downlink System

将比例公平调度机制推广到多天线多用户下行系统,提出了一种保障公平的资源分配方案和多用户调度机制。基站利用块对角化预编码机制,将多天线下行系统分解为并行无干扰子信道,并根据各个用户的信道状态,选择优化用户集进行传输,从而在保障公平性的同时最大化系统总速率。同时分析了信道反馈错误对该资源分配机制的影响。仿真结果表明,与其他几种用户调度机制相比,该资源分配方案在吞吐量和公平性之间取得了良好的折中。

A resource allocation and multi-user scheduling scheme with guaranteed fairness was proposed, which extended proportion fairness scheduling into downlink multi-user multiple-input multiple-output （MIMO） system. Specifically, the basestation exploited Block Diagonalization （BD） precoding technique to decompose MIMO broadcast channel into parallel non-interference subchannels. Based on the channel status information of users, the basestation selected an optimized subset of users in order to guarantee fairness as well as system sum-rate maximized. And the impact of feedback error on the resource allocation scheme was analyzed. Simulation results show that this resource allocation achieves good tradeoff between fairness and throughput compared to several other scheduling schemes.