MIMO broadcast channels with finite rate feedback
MIMO broadcast channels with finite rate feedback
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DOI：
10.1109/glocom.2005.1577905
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发表时间：
2006-03
期刊：
影响因子：
--
通讯作者：
N. Jindal
中科院分区：
文献类型：
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作者：
N. Jindal
下行通道中的多个发射天线可以提供巨大的容量（即多路复用）增益，即使接收器只有单个天线。然而，通常需要接收和发送信道状态信息。本文分析了一种接收端具有完备的信道知识，而发送端只接收信道实例化量化信息的系统。给出了由有限速率反馈引起的容量退化的简单表达式，以及每个移动设备反馈负载作为接入点天线数量和系统信噪比的函数所需的增加。
Multiple transmit antennas in a downlink channel can provide tremendous capacity (i.e. multiplexing) gains, even when receivers have only single antennas. However, receiver and transmitter channel state information is generally required. In this paper, a system where the receiver has perfect channel knowledge, but the transmitter only receives quantized information regarding the channel instantiation is analyzed. Simple expressions for the capacity degradation due to finite rate feedback as well as the required increases in feedback load per mobile as a function of the number of access point antennas and the system SNR are provided.