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arXiv 1701.03342cs.ITmath.IT
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编码器端具有因果边信息的随机变化信道的研究

A Study on Arbitrarily Varying Channels with Causal Side Information at the Encoder

Uzi Pereg, Yossef Steinberg

摘要:

在这项工作中,我们研究了两个模型的任意变化的通道,因果边信息是在编码器中的因果关系的方式。首先,我们研究了任意变化的信道(AVC)的输入和状态的限制,当编码器的状态信息的因果关系的方式。上下限的随机码容量的开发。在消息平均输入约束的情况下,建立了确定性代码容量的下限。在对干扰机施加状态约束的情况下,当用户不受约束时,随机码边界重合,并且确定随机码容量。此外,对于这种情况下,一个广义的非对称性条件,在此条件下,确定性的代码容量与随机代码容量相一致。在我们的工作中考虑的第二个模型是任意变化的退化的广播信道与因果边信息的编码器(无约束)。我们建立了内界和外界的随机码容量区域和确定性的代码容量区域。然后,容量区域确定一类信道满足条件的策略变量和信道输出之间的互信息。作为一个例子,我们表明,该条件成立的任意变化的二进制对称广播信道,我们找到相应的容量区域。

英文摘要:

In this work, we study two models of arbitrarily varying channels, when causal side information is available at the encoder in a causal manner. First, we study the arbitrarily varying channel (AVC) with input and state constraints, when the encoder has state information in a causal manner. Lower and upper bounds on the random code capacity are developed. A lower bound on the deterministic code capacity is established in the case of a message-averaged input constraint. In the setting where a state constraint is imposed on the jammer, while the user is under no constraints, the random code bounds coincide, and the random code capacity is determined. Furthermore, for this scenario, a generalized non-symmetrizability condition is stated, under which the deterministic code capacity coincides with the random code capacity. A second model considered in our work is the arbitrarily varying degraded broadcast channel with causal side information at the encoder (without constraints). We establish inner and outer bounds on both the random code capacity region and the deterministic code capacity region. The capacity region is then determined for a class of channels satisfying a condition on the mutual informations between the strategy variables and the channel outputs. As an example, we show that the condition holds for the arbitrarily varying binary symmetric broadcast channel, and we find the corresponding capacity region.

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