D2D CSI feedback for D2D aided massive MIMO communications
D2D CSI feedback for D2D aided massive MIMO communications
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DOI：
10.1109/sam.2016.7569749
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发表时间：
2016-07
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通讯作者：
L. Cottatellucci
中科院分区：
文献类型：
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作者：
L. Cottatellucci
针对频分双工（FDD）模式下的快衰落大规模MIMO系统，提出了一种基于设备到设备（D2D）协作和统计信道状态信息（CSI）反馈的通信方案。用户终端（UT）被方便地集群化并且在集群内协作以经由D2D通信在目标UT处创建虚拟MIMO。我们提出并分析了在大规模MIMO基站（BS）的D2D CSI的使用，以提高性能相比，统计预编码器不经意的底层中继链路。在基站采用均匀线性阵列和D2D慢衰落信道的情况下，分析了最优预编码器的结构，提出了一种最优功率分配算法.通过数值模拟分析了所提出的通信方案的平均和速率，并将其与不考虑中继CSI的基线协议进行了比较。
We consider fast fading massive MIMO systems in Frequency Division Duplex (FDD) mode and propose a communication scheme based on Device-to-Device (D2D) cooperation and statistical channel state information (CSI) feedback. User terminals (UT) are conveniently clustered and cooperate within a cluster to create a virtual MIMO at a target UT via D2D communications. We propose and analyse the use of D2D CSI at a massive MIMO base station (BS) to enhance performance compared to statistical precoders oblivious of the underlying relaying links. In the case of uniform linear array (ULA) at the BS and slow fading channels for D2D links, the structure of an optimal precoder is characterized and an algorithm for optimal power allocation is proposed. The average sum rate of the proposed communication scheme is analyzed by numerical simulations and it is compared to a baseline protocol oblivious of the relaying CSI.