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Secure distributed estimation of linear systems

机译:安全分布式估计线性系统

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A two-dimensional linear time-invariant system is considered. The two dimensions of its states are observed by one sensor each. Every sensor quantizes its observations into a finite number of messages, using also the other sensor's past decisions. The combined sensor outputs should allow for a bounded estimation error (reliability). For a natural quantizer, we identify the cases where a price in the quantizer sum rate has to be paid for the fact that observations are distributed. At the same time, an eavesdropper should not be able to track the system state (security). Using the same quantizer as before, security is shown to be possible if the eavesdropper has less information than the estimator in that it for each sensor message pair obtains a larger set of indistinguishable message pairs.
机译:考虑二维线性时间不变系统。其各种传感器的两个维度各自观察到每个传感器。每个传感器量化其观察到有限数量的消息,也使用其他传感器的过去的决定。组合传感器输出应允许有界估计误差(可靠性)。对于天然量化器,我们确定必须支付数量化符合率的价格的情况,以便分发观察。同时,窃听者不应该能够跟踪系统状态(安全性)。使用相同的量化器如前所述,如果窃听器具有比估计器的信息较少,所以可以提供安全性,因为每个传感器消息对获取更大的难以区分的消息对。

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