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arXiv 1111.3966cs.ITmath.IT
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因果认知中继信道中的部分解码-前向合并方案

Partial Decode-Forward Binning Schemes for the Causal Cognitive Relay Channels

Zhuohua Wu, Mai Vu

摘要:

因果认知中继信道(CRC)具有两个发送者-接收者对,其中第二发送者从第一发送者因果地获得信息并辅助两个发送者的传输。在本文中,我们研究了全双工和半双工模式。在每一种模式下,我们提出了两个新的编码方案相继建立在另一个说明不同的编码技术的影响。第一种方案称为部分解码前向装仓(PDF-binning),其结合了部分解码前向中继和Gelfand-Pinsker装仓的思想。第二种方案称为Han-Kobayashi部分解码-前向合并(HK-PDF-binning),其通过进一步的分裂率和应用叠加编码、条件合并和松弛联合解码将PDF合并与Han-Kobayashi编码相结合。在这两种方案中,第二发送方解码来自第一发送方的消息的一部分,然后使用Gelfand-Pinsker分箱技术对解码的码字进行分箱,但是以允许状态无效和转发的方式。对于高斯信道,这种PDF分箱本质上是发射信号与分箱状态之间的相关性,其包含传统的脏纸编码分箱作为该相关因子为零时的特殊情况。我们还提供了封闭形式的最佳装箱参数为每个方案。两阶段半双工方案通过去除块马尔可夫编码、在不同阶段发送不同的消息部分以及在两个阶段应用联合解码而从全双工方案适应。分析表明,在这两种模式下的HK-PDF-binning方案涵盖了Han-Kobayashi速率区域,并实现了第一发送方的部分解码转发中继速率和第二发送方的无干扰速率。此外,该方案优于所有现有方案。

英文摘要:

The causal cognitive relay channel (CRC) has two sender-receiver pairs, in which the second sender obtains information from the first sender causally and assists the transmission of both senders. In this paper, we study both the full- and half-duplex modes. In each mode, we propose two new coding schemes built successively upon one another to illustrate the impact of different coding techniques. The first scheme called partial decode-forward binning (PDF-binning) combines the ideas of partial decode-forward relaying and Gelfand-Pinsker binning. The second scheme called Han-Kobayashi partial decode-forward binning (HK-PDF-binning) combines PDF-binning with Han-Kobayashi coding by further splitting rates and applying superposition coding, conditional binning and relaxed joint decoding. In both schemes, the second sender decodes a part of the message from the first sender, then uses Gelfand-Pinsker binning technique to bin against the decoded codeword, but in such a way that allows both state nullifying and forwarding. For the Gaussian channels, this PDF-binning essentializes to a correlation between the transmit signal and the binning state, which encompasses the traditional dirty-paper-coding binning as a special case when this correlation factor is zero. We also provide the closed-form optimal binning parameter for each scheme. The 2-phase half-duplex schemes are adapted from the full-duplex ones by removing block Markov encoding, sending different message parts in different phases and applying joint decoding across both phases. Analysis shows that the HK-PDF-binning scheme in both modes encompasses the Han-Kobayashi rate region and achieves both the partial decode-forward relaying rate for the first sender and interference-free rate for the second sender. Furthermore, this scheme outperforms all existing schemes.

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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