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arXiv 2304.14166cs.ITmath.IT
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对抗信道的假设检验:切尔诺夫-斯坦因指数(Chernoff-Stein Exponents)

Hypothesis Testing for Adversarial Channels: Chernoff-Stein Exponents

Eeshan Modak, Neha Sangwan, Mayank Bakshi, Bikash Kumar Dey, Vinod M. Prabhakaran

AI总结:

本文研究对抗信道下二元假设检验的切尔诺夫-斯坦因指数,分析确定性、私有随机化、共享随机数三类发射机场景,发现共享随机数下无记忆传输最优,私有随机化下该策略严格次优。

摘要:

我们研究如下二元假设检验问题的切尔诺夫-斯坦因指数(Chernoff-Stein exponent):每个假设对应一组信道。发射机在未知假设的情况下选择信道输入向量。给定假设后,敌手从该假设对应的信道集合中为输入向量的每个元素选择一个信道。检测器基于信道输出尝试区分两种假设。我们针对发射机具备三种不同特性的情形研究切尔诺夫-斯坦因指数:(i)确定性发射机;(ii)可进行私有随机化的发射机;(iii)与检测器共享敌手无法获取的随机数的发射机。研究结果表明,尽管在共享随机数条件下无记忆传输策略是最优的,但当发射机仅具备私有随机数时,该策略可能严格次优。

英文摘要:

We study the Chernoff-Stein exponent of the following binary hypothesis testing problem: Associated with each hypothesis is a set of channels. A transmitter, without knowledge of the hypothesis, chooses the vector of inputs to the channel. Given the hypothesis, from the set associated with the hypothesis, an adversary chooses channels, one for each element of the input vector. Based on the channel outputs, a detector attempts to distinguish between the hypotheses. We study the Chernoff-Stein exponent for the cases where the transmitter (i) is deterministic, (ii) may privately randomize, and (iii) shares randomness with the detector that is unavailable to the adversary. It turns out that while a memoryless transmission strategy is optimal under shared randomness, it may be strictly suboptimal when the transmitter only has private randomness.

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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