arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0910.4688cs.ITmath.IT
收藏

耦合系统中最快的检测

Quickest detection in coupled systems

Olympia Hadjiliadis, Tobias Schaefer, H. Vincent Poor

摘要:

这项工作考虑了N个传感器的耦合系统中的信号的最快检测问题,该系统从环境中接收连续的顺序观测。它是假设的信号,这是一个通用的伊藤过程建模,耦合跨传感器,但它们的发病时间可能会有所不同,从传感器到传感器。目标是系统中的任何传感器接收信号的第一时间的最佳检测。该问题被制定为一个随机优化问题,其中扩展的平均Kullback-Leibler发散准则被用作检测延迟的度量,与平均时间之间的虚警的约束。考虑了传感器采用累积和策略的情况,证明了当平均虚警间隔时间无限增加时,N个累积和策略的最小值是渐近最优的.

英文摘要:

This work considers the problem of quickest detection of signals in a coupled system of N sensors, which receive continuous sequential observations from the environment. It is assumed that the signals, which are modeled a general Ito processes, are coupled across sensors, but that their onset times may differ from sensor to sensor. The objective is the optimal detection of the first time at which any sensor in the system receives a signal. The problem is formulated as a stochastic optimization problem in which an extended average Kullback- Leibler divergence criterion is used as a measure of detection delay, with a constraint on the mean time between false alarms. The case in which the sensors employ cumulative sum (CUSUM) strategies is considered, and it is proved that the minimum of N CUSUMs is asymptotically optimal as the mean time between false alarms increases without bound.

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。

↑