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arXiv 2006.00892cs.ITmath.IT
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一类非稳态加性噪声信道零差错反馈容量的显式公式

An Explicit Formula for the Zero-Error Feedback Capacity of a Class of Finite-State Additive Noise Channels

Amir Saberi, Farhad Farokhi, Girish N. Nair

摘要:

已知对于具有相关加性噪声的离散信道,具有或不具有反馈的普通容量都等于$ \log q-\mathcal{H} (Z) $,其中$ \mathcal{H}(Z) $是噪声过程的熵率$ Z $,而$ q $是字母表大小。本文介绍了一类有限状态加性噪声信道。它表明,这种信道的零错误反馈容量是零或$C_{0f} =\log q -h (Z) $,其中$ h (Z) $是{ \em拓扑熵}的噪声过程。当无反馈和有反馈时,给出了零误差容量为零的拓扑条件。此外,无反馈的零差错容量的下限为$ \log q-2 h (Z) $。我们明确计算零错误反馈容量的几个例子,包括孤立错误和吉尔伯特-埃利奥特信道的信道。

英文摘要:

It is known that for a discrete channel with correlated additive noise, the ordinary capacity with or without feedback both equal $ \log q-\mathcal{H} (Z) $, where $ \mathcal{H}(Z) $ is the entropy rate of the noise process $ Z $ and $ q $ is the alphabet size. In this paper, a class of finite-state additive noise channels is introduced. It is shown that the zero-error feedback capacity of such channels is either zero or $C_{0f} =\log q -h (Z) $, where $ h (Z) $ is the {\em topological entropy} of the noise process. A topological condition is given when the zero-error capacity is zero, with or without feedback. Moreover, the zero-error capacity without feedback is lower-bounded by $ \log q-2 h (Z) $. We explicitly compute the zero-error feedback capacity for several examples, including channels with isolated errors and a Gilbert-Elliot channel.

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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