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arXiv 1202.5014cs.ITmath.IT
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双向干扰通道

Two-way Interference Channels

Changho Suh, I-Hsiang Wang, David Tse

摘要:

我们考虑双向干扰信道(IC),其中前向和后向信道是IC但不一定相同。我们首先考虑的情况下,只有两个前向消息和反馈是通过后向IC提供帮助前向消息传输。对于该通道的线性确定性模型,我们开发了匹配大范围通道参数的内边界和外边界。我们发现,反向IC可以更有效地用于反馈,而不是如果它被用于发送自己的独立的反向消息。因此,我们表明,反馈可以提供一个净增加容量,即使反馈成本考虑在内。此外,我们扩展到一个更一般的情况下,两个额外的独立的后向消息,从中我们发现,互动可以提供一个任意大的增益容量。

英文摘要:

We consider two-way interference channels (ICs) where forward and backward channels are ICs but not necessarily the same. We first consider a scenario where there are only two forward messages and feedback is offered through the backward IC for aiding forward-message transmission. For a linear deterministic model of this channel, we develop inner and outer bounds that match for a wide range of channel parameters. We find that the backward IC can be more efficiently used for feedback rather than if it were used for sending its own independent backward messages. As a consequence, we show that feedback can provide a net increase in capacity even if feedback cost is taken into consideration. Moreover we extend this to a more general scenario with two additional independent backward messages, from which we find that interaction can provide an arbitrarily large gain in capacity.

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