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arXiv 1810.03427cs.ITmath.IT
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基于协同检测的分布式假设检验

Distributed Hypothesis Testing with Collaborative Detection

Pierre Escamilla, Abdellatif Zaidi, Michèle Wigger

摘要:

考虑了一个具有单个传感器和两个检测器的检测系统,其中每个终端观察无记忆源序列,传感器向两个检测器发送消息,并且第一检测器向第二检测器发送消息。这些消息的通信被假定为无差错但速率受限。在三个终端处观察到的源序列的联合概率质量函数(pmf)取决于$\mathsf{M}$ -ary假设$(\mathsf{M} \geq 2)$,并且通信的目标是每个检测器可以猜测潜在的假设。检测器$k$,$k=1,2$旨在最大化误差指数\textit{under hypothesis} $i_k$,$i_k \in \{1,\ldots,\mathsf{M}\}$,同时确保在所有其他假设下的小误差概率。我们研究这个问题的情况下,检测器的目标是最大化其误差指数下的\textit{same}假设(即,$i_1=i_2$)以及在它们旨在使它们在\textit{distinct}假设下的误差指数最大化的情况下(即,$i_1 \neq i_2$)。对于设置中,$i_1=i_2$,我们提出了一个可实现的指数区域的情况下,积极的通信速率,并表明,它是最佳的测试对独立性的特定情况。我们还刻画了零通信速率情况下的最优指数区域。对于其中$i_1 \neq i_2$的设置,我们刻画了零通信速率情况下的最佳指数区域。

英文摘要:

A detection system with a single sensor and two detectors is considered, where each of the terminals observes a memoryless source sequence, the sensor sends a message to both detectors and the first detector sends a message to the second detector. Communication of these messages is assumed to be error-free but rate-limited. The joint probability mass function (pmf) of the source sequences observed at the three terminals depends on an $\mathsf{M}$-ary hypothesis $(\mathsf{M} \geq 2)$, and the goal of the communication is that each detector can guess the underlying hypothesis. Detector $k$, $k=1,2$, aims to maximize the error exponent \textit{under hypothesis} $i_k$, $i_k \in \{1,\ldots,\mathsf{M}\}$, while ensuring a small probability of error under all other hypotheses. We study this problem in the case in which the detectors aim to maximize their error exponents under the \textit{same} hypothesis (i.e., $i_1=i_2$) and in the case in which they aim to maximize their error exponents under \textit{distinct} hypotheses (i.e., $i_1 \neq i_2$). For the setting in which $i_1=i_2$, we present an achievable exponents region for the case of positive communication rates, and show that it is optimal for a specific case of testing against independence. We also characterize the optimal exponents region in the case of zero communication rates. For the setting in which $i_1 \neq i_2$, we characterize the optimal exponents region in the case of zero communication rates.

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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