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arXiv 0808.3145cs.ITmath.IT
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双向中继信道的近似容量:确定性方法

Approximate capacity of the two-way relay channel: A deterministic approach

Amir Salman Avestimehr, Aydin Sezgin, David N. C. Tse

摘要:

研究了两个节点一个中继的全双工双向(或双向)中继信道的容量。假设前向方向上的信道与后向方向上的信道不同(通常),即不假设信道互易性。我们使用最近提出的确定性方法来捕捉问题的本质,并确定一个良好的传输和中继策略的高斯信道。根据各个信道增益的比率,我们建议在中继器处使用简单的放大转发或特定的叠加编码策略。我们分析了可实现的速率区域,并表明该方案实现了3位内的割集界的所有值的信道增益。

英文摘要:

We study the capacity of the full-duplex bidirectional (or two-way) relay channel with two nodes and one relay. The channels in the forward direction are assumed to be different (in general) than the channels in the backward direction, i.e. channel reciprocity is not assumed. We use the recently proposed deterministic approach to capture the essence of the problem and to determine a good transmission and relay strategy for the Gaussian channel. Depending on the ratio of the individual channel gains, we propose to use either a simple amplify-and-forward or a particular superposition coding strategy at the relay. We analyze the achievable rate region and show that the scheme achieves to within 3 bits the cut-set bound for all values of channel gains.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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