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arXiv 1604.01434cs.ITmath.IT
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复合信道容量的一般公式

A General Formula for Compound Channel Capacity

Sergey Loyka, Charalambos D. Charalambous

摘要:

利用信息密度方法,得到了具有接收端信道状态信息的任意复合信道容量的一般公式。该算法没有遍历性、平稳性和信息稳定性的假设,信道状态集是任意的。一个直接的(建设性的)证明。为了证明可拓性,我们将Feinstein引理推广到复合通道设置,为了证明逆,我们将Verdu-Han引理推广到相同的复合设置。一个统一的复合通道的概念被引入和一般公式示出,以减少到熟悉的$\sup-\inf$表达这样的渠道。作为一个副产品,任意变化的信道容量下建立最大错误概率和确定性编码。建立条件,在该条件下,最坏情况和复合信道容量相等,使得在发射机处的全信道状态信息没有带来优势。在一般公式中,复合信息率起着突出的作用。它的性质进行了研究,并建立了复合信道的信息不稳定和信息稳定制度之间的联系。结果被扩展到包括复合通道的$\varepsilon$ -容量。给出了强逆成立的充分必要条件。

英文摘要:

A general formula for the capacity of arbitrary compound channels with the receiver channel state information is obtained using the information density approach. No assumptions of ergodicity, stationarity or information stability are made and the channel state set is arbitrary. A direct (constructive) proof is given. To prove achievability, we generalize Feinstein Lemma to the compound channel setting, and to prove converse, we generalize Verdu-Han Lemma to the same compound setting. A notion of a uniform compound channel is introduced and the general formula is shown to reduce to the familiar $\sup-\inf$ expression for such channels. As a by-product, the arbitrary varying channel capacity is established under maximum error probability and deterministic coding. Conditions are established under which the worst-case and compound channel capacities are equal so that the full channel state information at the transmitter brings in no advantage. The compound inf-information rate plays a prominent role in the general formula. Its properties are studied and a link between information-unstable and information-stable regimes of a compound channel is established. The results are extended to include $\varepsilon$-capacity of compound channels. Sufficient and necessary conditions for the strong converse to hold are given.

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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