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Asymptotic Capacity of the Separated MIMO Two-Way Relay Channel

机译:分离式MIMO两路中继信道的渐近容量

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摘要

A multiple-input multiple-output two-way relay channel consisting of two communication nodes and a full-duplex relay node in which no direct link exists between the two communication nodes is considered. We propose an achievable scheme that employs horizontally encoded lattice codes combined with generalized singular value decomposition-based precoding for the first phase. The second phase of the proposed scheme follows the fundamentals of the previous scheme, which uses vertically encoded structural bining, with the only difference that the added codeword of the two codewords from the communication nodes, instead of those two individual codewords, is decoded and retransmitted in the proposed scheme. We show that the proposed scheme achieves the cut-set bound asymptotically as the signal-to-noise ratios of the channels tend to infinity.
机译:考虑由两个通信节点和全双工中继节点组成的多输入多输出双向中继信道,在该全双工中继节点中,两个通信节点之间不存在直接链路。我们提出了一种可实现的方案,该方案将水平编码的格码与第一阶段基于广义奇异值分解的预编码结合使用。提议方案的第二阶段遵循先前方案的基础,该方案使用垂直编码的结构合并,唯一的区别是来自通信节点的两个码字的添加码字而不是那两个单独的码字被解码并重新传输在建议的方案中。我们表明,由于信道的信噪比趋于无穷大,因此所提出的方案渐近地实现了割集约束。

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