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Multicoding Schemes for Interference Channels

机译：干扰信道的多编码方案

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摘要

The best known inner bound for the two-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 (also known as unidirectional partial cribbing).
机译：两用户离散无记忆干扰信道的最著名内界是Han-Kobayashi速率区域。实现该区域的编码方案基于速率分解和叠加编码。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关键优势在于，它可以自然地扩展到更通用的设置，例如当编码器具有状态信息或可以相互监听时。特别是，我们扩展了编码方案，以在无因果状态信息在干扰发射机处可用时，描述与状态有关的确定性Z干扰信道的容量区域。我们将结果专门用于带有ON / OFF干扰的线性确定性模型的情况，该模型对无线系统进行建模，在该系统中，认知发射机无因地意识到其干扰一次传输的时间。对于这种特殊情况，我们为容量区域提供了一个明确的表达式，并讨论了最佳策略的一些有趣特性。当干扰发射机的信号可以在另一个发射机上被窃听时（也称为单向部分抄写），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。

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