Cooperative zero forcing in multi-pair multi-relay networks
Cooperative zero forcing in multi-pair multi-relay networks
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DOI：
10.1109/pimrc.2012.6362631
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发表时间：
2012-11
期刊：
影响因子：
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通讯作者：
R. S. Ganesan;Hussein Al-Shatri;T. Weber;A. Klein
中科院分区：
文献类型：
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作者：
R. S. Ganesan;Hussein Al-Shatri;T. Weber;A. Klein
本文考虑K个半双工节点对之间的单向通信。每个源节点具有N个天线，并且每个目的地节点具有M个天线。源节点和目的节点之间没有直接链接。Q个半双工中继，每个中继具有R个天线，协助通信。假设中继器没有足够的天线来空间分离数据流，因此，在中继器处不能执行双向迫零。在本文中，我们提出了一种方案，其中源节点和中继合作选择他们的预编码矩阵和滤波器系数，分别执行合作迫零。提出了一个封闭形式的解决方案，并推导出可行性条件。仿真结果表明，所提出的合作迫零方案实现了更多的自由度，因此，实现更高的和率相比，参考方案。
In this paper, unidirectional communication between K half-duplex node pairs is considered. The source nodes have N antennas each and the destination nodes have M antennas each. There is no direct link between the source and the destination nodes. Q half-duplex relays, each with R antennas, assist in the communication. It is assumed that the relays do not have enough antennas to spatially separate the data streams and hence, transceive zero forcing cannot be performed at the relays. In this paper, we propose a scheme in which the source nodes and the relays cooperate in choosing their precoding matrices and the filter coefficients, respectively, to perform a cooperative zero forcing. A closed form solution is proposed and the feasibility condition is derived. Simulation results show that the proposed cooperative zero forcing scheme achieves more degrees of freedom and hence, achieves higher sum rate as compared to reference schemes.