Approximate capacity region of the two-pair bidirectional Gaussian relay network
Approximate capacity region of the two-pair bidirectional Gaussian relay network
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DOI：
10.1109/isit.2009.5205584
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发表时间：
2009-06
期刊：
影响因子：
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通讯作者：
B. Hassibi;A. Sezgin;M. Khajehnejad;A. Avestimehr
中科院分区：
文献类型：
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作者：
B. Hassibi;A. Sezgin;M. Khajehnejad;A. Avestimehr
我们研究了高斯双对全双工定向(或双向)中继网络的容量，该网络由一个中继器支持对通信。该网络是众所周知的双向中继信道的推广，在该信道中我们只有一对用户。提出了一种新的传输技术，该技术基于源节点格码和随机高斯码的特定叠加。中继器尝试对每对的高斯码字和点阵码字的叠加进行解码。然后，它将该信息转发给所有用户。我们分析了该方案的可实现速率，并证明了对于所有的信道增益，它都达到了两对双向中继网容量区域上的割集上限的2比特/秒/赫兹以内。
We study the capacity of the Gaussian two-pair fullduplex directional (or two-way) relay network with a single-relay supporting the communication of the pairs. This network is a generalization of the well known bidirectional relay channel, where we have only one pair of users. We propose a novel transmission technique which is based on a specific superposition of lattice codes and random Gaussian codes at the source nodes. The relay attempts to decode the Gaussian codewords and the superposition of the lattice codewords of each pair. Then it forwards this information to all users. We analyze the achievable rate of this scheme and show that for all channel gains it achieves to within 2 bits/sec/Hz per user of the cut-set upper bound on the capacity region of the two-pair bidirectional relay network.