arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2012.13027eess.SPcs.ITmath.ITstat.AP
收藏

未知变化后分布的传感器网络最快检测算法

Quickest Detection over Sensor Networks with Unknown Post-Change Distribution

Deniz Sargun, C. Emre Koksal

摘要:

我们提出了一个最快的变化检测问题,传感器网络中的传感器的子集正在发生变化和局部变化后的分布是未知的。网络中的每个传感器在有限的字母表上观察局部离散时间随机过程。初始时,观测值是独立同分布(i.i.d.)的。已知的变化前分布独立于其它传感器。在固定但未知的变化点处,传感器的固定但未知的子集经历变化并开始观察来自未知分布的样本。我们假设可以使用分布空间上的凹(或凸)局部统计量来量化变化。我们提出了一个渐近最优的和计算易处理的停时Lorden的标准。在这种情况下,我们提出的方法使用凹的全球累积和(CIMUM)统计融合中心和抑制最有可能的虚警使用信息投影。最后,我们给出了一些数值模拟的结果,我们的算法所描述的问题。

英文摘要:

We propose a quickest change detection problem over sensor networks where both the subset of sensors undergoing a change and the local post-change distributions are unknown. Each sensor in the network observes a local discrete time random process over a finite alphabet. Initially, the observations are independent and identically distributed (i.i.d.) with known pre-change distributions independent from other sensors. At a fixed but unknown change point, a fixed but unknown subset of the sensors undergo a change and start observing samples from an unknown distribution. We assume the change can be quantified using concave (or convex) local statistics over the space of distributions. We propose an asymptotically optimal and computationally tractable stopping time for Lorden's criterion. Under this scenario, our proposed method uses a concave global cumulative sum (CUSUM) statistic at the fusion center and suppresses the most likely false alarms using information projection. Finally, we show some numerical results of the simulation of our algorithm for the problem described.

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。

↑