141 citations · 310 across the 29 of their papers we have counts for
33 papers
Remote State Estimation with Unreliable Communication: Information Asymmetry and Belief Structure
Ioannis Tzortzis, Themistoklis Charalambous
In this paper, we study remote state estimation under unreliable forward and feedback communication between a smart sensor and a remote estimator. When the sensor cannot perfectly…
Lightweight Gated Recurrent Unit Variants for Real-Time Channel Prediction
Kyriakos Christodoulides, Kyriakos M. Deliparaschos, Risto Wichman +1
Machine-learning-based channel predictors must operate under stringent latency, memory, and computational constraints while remaining robust to noisy and time-varying observations.…
Remote Estimation for Markov Jump Linear Systems: A Distributionally Robust Approach
Ioannis Tzortzis, Themistoklis Charalambous, Charalambos D. Charalambous
This paper considers the problem of remote state estimation for Markov jump linear systems in the presence of uncertainty in the posterior mode probabilities. Such uncertainty may…
Implicit and Explicit Formulas of the Joint RDF for a Tuple of Multivariate Gaussian Sources with Individual Square-Error Distortions
Evagoras Stylianou, Charalambos D. Charalambous, Themistoklis Charalambous
This paper analyzes the joint Rate Distortion Function (RDF) of correlated multivariate Gaussian sources with individual square-error distortions. Leveraging Hotelling's canonical…
Distributed Average Consensus in Wireless Multi-Agent Systems with Over-the-Air Aggregation
Themistoklis Charalambous, Zheng Chen, Christoforos N. Hadjicostis
In this paper, we address the average consensus problem of multi-agent systems over wireless networks. We propose a distributed average consensus algorithm by invoking the concept…
Remote Estimation over Packet-Dropping Wireless Channels with Partial State Information
Ioannis Tzortzis, Evagoras Makridis, Charalambos D. Charalambous +1
In this paper, we study the design of an optimal transmission policy for remote state estimation over packet-dropping wireless channels with imperfect channel state information. A…