论文标题
三用户MIMO广播频道的可实现的DOF区域延迟
Achievable DoF Regions of Three-User MIMO Broadcast Channel with Delayed CSIT
论文作者
论文摘要
对于两种用户多输入多输出（MIMO）广播通道，在发射器（CSIT）和任意天线配置处具有延迟的通道状态信息，所有自由度（DOF）区域均获得。但是，对于具有延迟CSIT和任意天线配置的三用户MIMO广播通道，订单-2消息的DOF区域仍然不清楚，并且仅获得了订单-1消息的部分可实现的DOF区域，其中分别由两个接收器和一个接收器弥补了订单2消息和订单-1消息。在本文中，对于具有延迟的CSIT和任意天线配置的三用户MIMO广播频道，我们首先设计用于订单2消息和订单1消息的传输方案。接下来，我们建议通过转换方法分析可实现的传输方案DOF区域。特别是，我们改变了传输方案的解码条件W.R.T.可实现的DOF区域W.R.T.可实现的DOF，通过连接相位持续时间和可实现的DOF的可实现的DOF元组表达。结果，订单2消息的DOF区域是表征的，并且完全表达了订单1消息的可实现的DOF区域。此外，对于订单1消息，我们得出了足够的条件，在该条件下，建议可实现的DOF区域是DOF区域。
For the two-user multiple-input multiple-output (MIMO) broadcast channel with delayed channel state information at the transmitter (CSIT) and arbitrary antenna configurations, all the degrees-of-freedom (DoF) regions are obtained. However, for the three-user MIMO broadcast channel with delayed CSIT and arbitrary antenna configurations, the DoF region of order-2 messages is still unclear and only a partial achievable DoF region of order-1 messages is obtained, where the order-2 messages and order-1 messages are desired by two receivers and one receiver, respectively. In this paper, for the three-user MIMO broadcast channel with delayed CSIT and arbitrary antenna configurations, we first design transmission schemes for order-2 messages and order-1 messages. Next, we propose to analyze the achievable DoF region of transmission scheme by transformation approach. In particular, we transform the decoding condition of transmission scheme w.r.t. phase duration into the achievable DoF region w.r.t. achievable DoF, through achievable DoF tuple expression connecting phase duration and achievable DoF. As a result, the DoF region of order-2 messages is characterized and an achievable DoF region of order-1 messages is completely expressed. Besides, for order-1 messages, we derive the sufficient condition, under which the proposed achievable DoF region is the DoF region.
