基于不同调度算法的多用户分集MIMO中继信道容量分析

Capacity Analysis of MIMO Relay Channels with Multiuser Diversity under Different Scheduling Policies

采用平均容量性能来定量分析多用户分集多输入多输出(MIMO)中继信道,中继节点使用放大转发(Amplify-and-forward,AF)协议将接收到的源节点的发送信号重发给目的节点。研究了多用户MIMO中继信道的不同调度算法,即容量公平、最大特征根、最小特征根调度策略和空间独立性调度算法,结果表明空间独立性调度算法有最优容量性能。但是,矢量反馈调度策略的应用使得反向链路容量有较高的反馈负载,而相比于矢量反馈策略,标量反馈方案的反馈量较小。在选择调度方案的时候要充分考虑到这些特性,权衡利弊并折衷选择适宜的调度策略。

The performance of average capacity is used to quantitatively analyse the multiple-input multiple-output （MIMO） relay channels with multiuser diversity, where relay node uses the amplify- and- forward （AF） protocol to retransmit the received signal from the source to the destination. The muhiuser MIMO relay channel scheduling algorithms such as Capacity Fairness Scheduling, Maximal Eigenvalue Scheduling and Minimal Eigenvalue Scheduling are studied. It can be conclude that spatial independence of the scheduling algorithm has optimal capacity performance. However, the application of vector feedback scheduling strategy allows the reverse link capacity of a higher feedback load. Compared with vector feedback strategy, the scalar feedback strategies have small amount of feedback. Therefore, during the actual scheduling, it should take full account of these characteristics, and then choose the appropriate scheduling policy on balance.