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arXiv 1502.04273cs.ITmath.IT
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干扰信道下的多编码方案

Multicoding Schemes for Interference Channels

Ritesh Kolte, Ayfer Özgür, Haim Permuter

摘要:

2用户离散无记忆干扰信道的最著名的内界是Han-Kobayashi速率区域。实现该区域的编码方案基于速率分裂和叠加编码。在本文中,我们开发了一种多编码方案,以实现相同的速率区域。所提出的编码方案的多编码性质的一个关键优点是,它可以自然地扩展到更一般的设置,例如当编码器有状态信息或可以偷听对方。特别是,我们扩展我们的编码方案,以表征的能力区域的状态相关的确定性Z-干扰信道的非因果状态信息时,在干扰发射机。我们专门研究我们的结果的情况下,线性确定性模型与开/关干扰的无线系统中,认知发射机是noncausally知道它干扰的主要传输的时间模型。对于这种特殊的情况下,我们提供了一个明确的表达能力的区域,并讨论了一些有趣的最优策略的性质。我们还扩展了我们的多编码方案,以找到确定性Z-干扰信道的容量区域时,干扰发射机的信号可以在其他发射机(a.k.a.单向局部垛式)。

英文摘要:

The best known inner bound for the 2-user discrete memoryless interference channel is the Han-Kobayashi rate region. The coding schemes that achieve this region are based on rate-splitting and superposition coding. In this paper, we develop a multicoding scheme to achieve the same rate region. A key advantage of the multicoding nature of the proposed coding scheme is that it can be naturally extended to more general settings, such as when encoders have state information or can overhear each other. In particular, we extend our coding scheme to characterize the capacity region of the state-dependent deterministic Z-interference channel when noncausal state information is available at the interfering transmitter. We specialize our results to the case of the linear deterministic model with on/off interference which models a wireless system where a cognitive transmitter is noncausally aware of the times it interferes with a primary transmission. For this special case, we provide an explicit expression for the capacity region and discuss some interesting properties of the optimal strategy. We also extend our multicoding scheme to find the capacity region of the deterministic Z-interference channel when the signal of the interfering transmitter can be overheard at the other transmitter (a.k.a. unidirectional partial cribbing).

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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