Information Theory Capacity of the two-way relay channel within a constant gap
Information Theory Capacity of the two-way relay channel within a constant gap
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DOI：
10.1002/ett.1399
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发表时间：
2010-06
期刊：
影响因子：
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通讯作者：
A. Avestimehr;A. Sezgin;David Tse
中科院分区：
文献类型：
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作者：
A. Avestimehr;A. Sezgin;David Tse
摘要我们研究了具有两个节点和一个中继的全双工双向(或双向)中继信道的容量。假定正向通道(通常)不同于后向通道，即不计算通道互易性。我们使用最近提出的确定性方法来捕捉问题的本质，并确定用于高斯信道的良好的传输和中继策略。根据各个信道增益的比率，我们建议在中继站使用简单的放大转发或特定的叠加编码策略。我们分析了可达到的速率范围，结果表明，该方案将所有信道增益值的截集范围都达到了3比特以内。版权所有c 0000 AEIT
SUMMARY We study the capacity of the full-duplex bidirectional (or t wo-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 ass umed. 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. Copyright c 0000 AEIT