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arXiv 0808.0948cs.ITmath.IT
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一类菱形信道的容量

Capacity of a Class of Diamond Channels

Wei Kang, Sennur Ulukus

摘要:

我们研究一类特殊的钻石通道,这是由Schein在2001年推出的。在这个特殊的类中,每个菱形通道由一个发射机、一个噪声中继、一个无噪声中继和一个接收机组成。我们证明了这类钻石通道的能力,提供了一个可实现的计划和一个逆。我们的能力是严格小于割集界。我们的研究结果还表明,在有噪声的中继节点的解码和转发(decode-and-forward,简称decF)和压缩和转发(compress-and-forward,简称CAF)的组合的最优性。这是第一个例子,其中一个组合的反渗透和CAF被证明是能力实现。最后,我们注意到,存在一个对偶之间的钻石信道编码问题和Kaspi-Berger信源编码问题。

英文摘要:

We study a special class of diamond channels which was introduced by Schein in 2001. In this special class, each diamond channel consists of a transmitter, a noisy relay, a noiseless relay and a receiver. We prove the capacity of this class of diamond channels by providing an achievable scheme and a converse. The capacity we show is strictly smaller than the cut-set bound. Our result also shows the optimality of a combination of decode-and-forward (DAF) and compress-and-forward (CAF) at the noisy relay node. This is the first example where a combination of DAF and CAF is shown to be capacity achieving. Finally, we note that there exists a duality between this diamond channel coding problem and the Kaspi-Berger source coding problem.

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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