arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1408.4747math.STcs.ITmath.ITmath.PRstat.TH
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分散系统中数据高效的Minimax快速变化检测

Data-Efficient Minimax Quickest Change Detection in a Decentralized System

Taposh Banerjee, Venugopal. V. Veeravalli

摘要:

传感器网络被认为是一个序列的随机变量在每个传感器观察。在每一个时间步,一个处理后的版本的观察是从传感器传输到一个共同的节点称为融合中心。在某个未知的时间点,所有传感器节点处的观测值的分布发生变化。目标是在虚警率和每个传感器观测成本的限制下,尽快检测这种分布变化。针对上述问题,提出了极大极小问题的求解方法.提出了一种数据有效的算法,在该算法中,在每个传感器处使用自适应采样策略来控制在改变之前使用的观测值的成本。为了节省通信成本,偶尔从每个传感器向融合中心发送二进制数字。结果表明,所提出的算法是全局渐近最优的配方,作为虚警率趋于零。

英文摘要:

A sensor network is considered where a sequence of random variables is observed at each sensor. At each time step, a processed version of the observations is transmitted from the sensors to a common node called the fusion center. At some unknown point in time the distribution of the observations at all the sensor nodes changes. The objective is to detect this change in distribution as quickly as possible, subject to constraints on the false alarm rate and the cost of observations taken at each sensor. Minimax problem formulations are proposed for the above problem. A data-efficient algorithm is proposed in which an adaptive sampling strategy is used at each sensor to control the cost of observations used before change. To conserve the cost of communication an occasional binary digit is transmitted from each sensor to the fusion center. It is shown that the proposed algorithm is globally asymptotically optimal for the proposed formulations, as the false alarm rate goes to zero.

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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