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• W3002412555 abstract "We study the problem of designing a distributed observer for an LTI system over a time-varying communication graph. The limited existing work on this topic imposes various restrictions either on the observation model or on the sequence of communication graphs. In contrast, we propose a single-time-scale distributed observer that works under mild assumptions. Specifically, our communication model only requires strong-connectivity to be preserved over non-overlapping, contiguous intervals that are even allowed to grow unbounded over time. We show that under suitable conditions that bound the growth of such intervals, joint observability is sufficient to track the state of any discrete-time LTI system exponentially fast, at any desired rate. In fact, we also establish finite-time convergence based on our approach. Finally, we develop a variant of our algorithm that is provably robust to worst-case adversarial attacks, provided the sequence of graphs is sufficiently connected over time. The key to our approach is the notion of a freshness-index that keeps track of the age-of-information being diffused across the network. Such indices enable nodes to reject stale estimates of the state, and, in turn, contribute to stability of the error dynamics." @default.
• W3002412555 created "2020-01-30" @default.
• W3002412555 creator A5037162137 @default.
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• W3002412555 date "2020-01-20" @default.
• W3002412555 modified "2023-09-27" @default.
• W3002412555 title "Distributed State Estimation over Time-Varying Graphs: Exploiting the Age-of-Information" @default.
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• W3002412555 hasPublicationYear "2020" @default.
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