MIMO广播信道中联合多用户速率和延迟约束调度的研究

该文给出了一种多入多出高斯广播信道中具有延迟约束的多用户无线数据包的传输方案。首先，在信道的QR分解及脏纸编码基础上，通过贪婪算法获取多用户分集与包延迟约束之间的有效结合。其次，将包到达速率、可达服务速率、用户数以及传输天线数构成一优化问题，得到最佳的用户组合及调度周期。最后，在不同用户数及发射天线数情况下对该方案进行了性能仿真，仿真结果表明:在满足包传递最小延迟等待要求的同时，得到了传输容量的最大化。

Joint Multiuser Rate and Delay Constraint Scheduling in MIMO Broadcast Channel

In this paper a wireless packet transmission scheme over Multiple Input Multiple Output (MIMO) Gaussian Broadcast Channel (GBC) is proposed.Specifically,the transmission packet delay constraint and broadcast channel capacity are considered jointly,based on QR decomposition of channel and Dirty Paper Coding (DPC),a greedy algorithm is used to exploit multiuser diversity as well as transmission packet delay constraint in base station.It demonstrates that the packet arrival rate,achievable service rate,user number and transmitting antenna number can be formulated into an optimization problem.The simulation results show that the proposed scheme can maximize the system throughput,while providing guarantees on delay performance.