Charalambos D. Charalambous

ORCID

Publication Activity (10 Years)

Years Active: 1997-2024
Publications (10 Years): 94

Top Venues

CoRR

CDC

ISIT

IEEE Trans. Inf. Theory

Publications

Michail Gkagkos, Charalambos D. Charalambous
Structural Properties of the Wyner-Ziv Rate Distortion Function: Applications for Multivariate Gaussian Sources. Entropy 26 (4) (2024)
Charalambos D. Charalambous, Stelios Louka
Signalling and Control in Nonlinear Stochastic Systems: An Information State Approach with Applications. CoRR (2024)
Charalambos D. Charalambous, Christos K. Kourtellaris, Ioannis Tzortzis
Optimal Control and Signaling Strategies of Control-Coding Capacity of General Decision Models: Applications to Gaussian Models and Decentralized Strategies. SIAM J. Control. Optim. 62 (1) (2024)
Sergey Loyka, Charalambos D. Charalambous
On the Capacity of Gaussian MIMO Channels with Memory. CoRR (2022)
Ioannis Tzortzis, Charalambos D. Charalambous
Partially Observable Markov Decision Subject to Total Variation Distance Ambiguity. CDC (2022)
Charalambos D. Charalambous, Themistoklis Charalambous, Christos K. Kourtellaris, Jan H. van Schuppen
Complete Characterization of Gorbunov and Pinsker Nonanticipatory Epsilon Entropy of Multivariate Gaussian Sources: Structural Properties. IEEE Trans. Inf. Theory 68 (3) (2022)
Charalambos D. Charalambous, Themistoklis Charalambous
State-Dependent Generalizations of Nonanticipatory Epsilon Entropy of Partially Observable Processes. CDC (2022)
Charalambos D. Charalambous, Christos K. Kourtellaris, Stelios Louka
Signalling and Control of Nonlinear Partially Observable Stochastic Control Models. ECC (2022)
Charalambos D. Charalambous, Jan H. van Schuppen
A Realization Approach to Lossy Network Compression of a Tuple of Correlated Multivariate Gaussian RVs. Entropy 24 (9) (2022)
Lenos Hadjidemetriou, A. Akrytov, K. Kyriakou, Charalambos D. Charalambous, Markos Asprou, Irina Ciornei, Georgios Ellinas, Christoforos Panayiotou
Wide Area Control of Distributed Resources through 5G Communication to Provide Frequency Support. ISC2 (2022)
Markos Asprou, Antonis Akrytov, Lenos Hadjidemetriou, Charalambos D. Charalambous, Irina Ciornei, Georgios Ellinas, Christos G. Panayiotou
The Impact of Wireless Communication Networks on Wide Area Monitoring and Protection Applications. ISC2 (2022)
Charalambos D. Charalambous, Stelios Louka, Sergey Loyka
A Riccati-Lyapunov Approach to Nonfeedback Capacity of MIMO Gaussian Channels Driven by Stable and Uns table Noise. ITW (2022)
Sergey Loyka, Charalambos D. Charalambous
On the Capacity of Gaussian MIMO Channels With Memory. IEEE Commun. Lett. 26 (8) (2022)
Evagoras Stylianou, Charalambos D. Charalambous, Jan H. van Schuppen
Characterization of the Gray-Wyner Rate Region for Multivariate Gaussian Sources: Optimality of Gaussian Auxiliary RV. CoRR (2022)
Charalambos D. Charalambous, Stelios Louka
A Riccati-Lyapunov Approach to Nonfeedback Capacity of MIMO Gaussian Channels Driven by Stable and Unstable Noise. CoRR (2022)
Ioannis Tzortzis, Christoforos N. Hadjicostis, Charalambos D. Charalambous
Linear Quadratic Tracking Control of Hidden Markov Jump Linear Systems Subject to Ambiguity. CDC (2021)
Evagoras Stylianou, Charalambos D. Charalambous, Themistoklis Charalambous
Joint Rate Distortion Function of a Tuple of Correlated Multivariate Gaussian Sources with Individual Fidelity Criteria. ISIT (2021)
Stelios Louka, Christos K. Kourtellaris, Charalambos D. Charalambous
Feedback Capacity Formulas of AGN Channels Driven by Nonstationary Autoregressive Moving Average Noise. CoRR (2021)
Stelios Louka, Christos K. Kourtellaris, Charalambos D. Charalambous
Qualitative Analysis of Feedback Capacity of AGN Channels Driven by Unstable Versus Stable Autoregressive Moving Average Noise. ITW (2021)
Michail Gkagkos, Evagoras Stylianou, Charalambos D. Charalambous
Structural Properties of Optimal Test Channels for Gaussian Multivariate Partially Observable Distributed Sources. CoRR (2021)
Evagoras Stylianou, Charalambos D. Charalambous, Themistoklis Charalambous
Joint Rate Distortion Function of a Tuple of Correlated Multivariate Gaussian Sources with Individual Fidelity Criteria. CoRR (2021)
Charalambos D. Charalambous, Evagoras Stylianou
Joint Nonanticipative Rate Distortion Function for a Tuple of Random Processes with Individual Fidelity Criteria. CoRR (2021)
Charalambos D. Charalambous, Evagoras Stylianou
Joint Nonanticipative Rate Distortion Function for a Tuple of Random Processes with Individual Fidelity Criteria. CDC (2021)
Ioannis Tzortzis, Charalambos D. Charalambous, Christoforos N. Hadjicostis
A Distributionally Robust LQR for Systems with Multiple Uncertain Players. CDC (2021)
Charalambos D. Charalambous, Christos K. Kourtellaris, Themistoklis Charalambous
On the Fragile Rates of Linear Feedback Coding Schemes of Gaussian Channels with Memory. CoRR (2021)
Bhagyashri Telsang, Seddik M. Djouadi, Charalambos D. Charalambous
Numerical Evaluation of Exact Person-by-Person Optimal Nonlinear Control Strategies of the Witsenhausen Counterexample. ACC (2021)
Michail Gkagkos, Charalambos D. Charalambous
Structural Properties of Test Channels of the RDF for Gaussian Multivariate Distributed Sources. ISIT (2021)
Charalambos D. Charalambous, Christos K. Kourtellaris, Stelios Louka
Sequential Characterizations of Cover and Pombra Gaussian Feedback Capacity: Generalizations to MIMO Channels via Sufficient Statistic. ITW (2021)
Charalambos D. Charalambous, Christos K. Kourtellaris, Stelios Louka
On the Cover and Pombra Gaussian Feedback Capacity: Complete Sequential Characterizations via a Sufficient Statistic. CoRR (2021)
Ioannis Tzortzis, Charalambos D. Charalambous, Christoforos N. Hadjicostis
Jump LQR Systems With Unknown Transition Probabilities. IEEE Trans. Autom. Control. 66 (6) (2021)
Bhagyashri Telsang, Seddik M. Djouadi, Charalambos D. Charalambous
Numerical Evaluation of Exact Person-by-Person Optimal Nonlinear Control Strategies of the Witsenhausen Counterexample. CoRR (2020)
Charalambos D. Charalambous, Christos K. Kourtellaris, Ioannis Tzortzis
Ergodic Control-Coding Capacity of Stochastic Control Systems: Information Signalling and Hierarchical Optimality of Gaussian Systems. SIAM J. Control. Optim. 58 (1) (2020)
Charalambos D. Charalambous, Christos K. Kourtellaris, Stelios Louka
New Formulas of Feedback Capacity for AGN Channels with Memory: A Time-Domain Sufficient Statistic Approach. CoRR (2020)
Charalambos D. Charalambous, Jan H. van Schuppen
Characterization of Conditional Independence and Weak Realizations of Multivariate Gaussian Random Variables: Applications to Networks. ISIT (2020)
Christos K. Kourtellaris, Charalambos D. Charalambous, Sergey Loyka
From Feedback Capacity to Tight Achievable Rates without Feedback for AGN Channels with Stable and Unstable Autoregressive Noise. ISIT (2020)
Charalambos D. Charalambous, Themistoklis Charalambous, Christos K. Kourtellaris, Jan H. van Schuppen
Structural Properties of Nonanticipatory Epsilon Entropy of Multivariate Gaussian Sources. ISIT (2020)
Michail Gkagkos, Charalambos D. Charalambous
Structural Properties of Optimal Test Channels for Distributed Source Coding with Decoder Side Information for Multivariate Gaussian Sources with Square-Error Fidelity. CoRR (2020)
Charalambos D. Charalambous, Jan H. van Schuppen
Characterization of Conditional Independence and Weak Realizations of Multivariate Gaussian Random Variables: Applications to Networks. CoRR (2020)
Christos K. Kourtellaris, Charalambos D. Charalambous, Sergey Loyka
New Formulas of Ergodic Feedback Capacity of AGN Channels Driven by Stable and Unstable Autoregressive Noise. ISIT (2020)
Lenos Hadjidemetriou, Georgios Tertytchny, Hazem Karbouj, Charalambos D. Charalambous, Maria K. Michael, Marios Sazos, Michail Maniatakos
Demonstration of Man in the Middle Attack on a Feeder Power Factor Correction Unit. ISGT-Europe (2020)
Charalambos D. Charalambous, Christos K. Kourtellaris, Sergey Loyka
Time-Invariant Feedback Strategies Do Not Increase Capacity of AGN Channels Driven by Stable and Certain Unstable Autoregressive Noise. CoRR (2019)
Charalambos D. Charalambous, Christos K. Kourtellaris
Global Optimality of Encoders and MSE Decoders for Communicating Unstable Markov Processes over Unstable Gaussian Recursive Models with Feedback: A Nonanticipative RDF Approach. ISIT (2019)
Ioannis Tzortzis, Charalambos D. Charalambous, Christoforos N. Hadjicostis
Robust LQG for Markov Jump Linear Systems. CDC (2019)
Charalambos D. Charalambous, Jan H. van Schuppen
A New Approach to Lossy Network Compression of a Tuple of Correlated Multivariate Gaussian RVs. CoRR (2019)
Jan H. van Schuppen, Charalambos D. Charalambous
Concepts, Decompositions, and Optimal Control Laws for a Gaussian Team Problem. CDC (2019)
Ioannis Tzortzis, Charalambos D. Charalambous, Themistoklis Charalambous
Infinite Horizon Average Cost Dynamic Programming Subject to Total Variation Distance Ambiguity. SIAM J. Control. Optim. 57 (4) (2019)
Charalambos D. Charalambous, Christos K. Kourtellaris, Themistoklis Charalambous, Jan H. van Schuppen
Generalizations of Nonanticipative Rate Distortion Function to Multivariate Nonstationary Gaussian Autoregressive Processes. CDC (2019)
Charalambos D. Charalambous, Christos K. Kourtellaris, Sergey Loyka
Capacity Achieving Distributions and Separation Principle for Feedback Gaussian Channels With Memory: the LQG Theory of Directed Information. IEEE Trans. Inf. Theory 64 (9) (2018)
Photios A. Stavrou, Jan Østergaard, Charalambos D. Charalambous
Zero-Delay Rate Distortion via Filtering for Vector-Valued Gaussian Sources. CoRR (2018)
Photios A. Stavrou, Themistoklis Charalambous, Charalambos D. Charalambous, Sergey Loyka
Optimal Estimation via Nonanticipative Rate Distortion Function and Applications to Time-Varying Gauss-Markov Processes. SIAM J. Control. Optim. 56 (5) (2018)
Charalambos D. Charalambous
A Sufficient Condition for General Decentralized Cooperative Stochastic Differential Games. CDC (2018)
Christos K. Kourtellaris, Charalambos D. Charalambous
Information Structures for Feedback Capacity of Channels With Memory and Transmission Cost: Stochastic Optimal Control and Variational Equalities. IEEE Trans. Inf. Theory 64 (7) (2018)
Charalambos D. Charalambous, Christos K. Kourtellaris, Themistoklis Charalambous
A General Coding Scheme for Signaling Gaussian Processes Over Gaussian Decision Models. SPAWC (2018)
Charalambos D. Charalambous, Nasir Uddin Ahmed
Centralized Versus Decentralized Optimization of Distributed Stochastic Differential Decision Systems With Different Information Structures - Part II: Applications. IEEE Trans. Autom. Control. 63 (7) (2018)
Photios A. Stavrou, Jan Østergaard, Charalambos D. Charalambous
Zero-Delay Rate Distortion via Filtering for Vector-Valued Gaussian Sources. IEEE J. Sel. Top. Signal Process. 12 (5) (2018)
Charalambos D. Charalambous, Christos K. Kourtellaris, Sergey Loyka
Control-Coding Capacity of Decision Models Driven by Correlated Noise and Gaussian Application Examples. CDC (2018)
Andreas A. Malikopoulos, Charalambos D. Charalambous, Ioannis Tzortzis
The average cost of Markov chains subject to total variation distance uncertainty. Syst. Control. Lett. 120 (2018)
Photios A. Stavrou, Themistoklis Charalambous, Charalambos D. Charalambous, Sergey Loyka, Mikael Skoglund
Asymptotic Reverse-Waterfilling Characterization of Nonanticipative Rate Distortion Function of Vector-Valued Gauss-Markov Processes with MSE Distortion. CDC (2018)
Charalambos D. Charalambous, Photios A. Stavrou, Christos K. Kourtellaris, Ioannis Tzortzis
Directed Information Subject to a Fidelity. Applications to Conditionally Gaussian Processes. ECC (2018)
Ioannis Tzortzis, Charalambos D. Charalambous, Themistoklis Charalambous, Christoforos N. Hadjicostis, Mikael Johansson
Approximation of Markov Processes by Lower Dimensional Processes via Total Variation Metrics. IEEE Trans. Autom. Control. 62 (3) (2017)
Charalambos D. Charalambous, Nasir Uddin Ahmed
Centralized Versus Decentralized Optimization of Distributed Stochastic Differential Decision Systems With Different Information Structures-Part I: A General Theory. IEEE Trans. Autom. Control. 62 (3) (2017)
Photios A. Stavrou, Charalambos D. Charalambous, Christos K. Kourtellaris
Sequential Necessary and Sufficient Conditions for Capacity Achieving Distributions of Channels With Memory and Feedback. IEEE Trans. Inf. Theory 63 (11) (2017)
Christos K. Kourtellaris, Charalambos D. Charalambous, Ioannis Tzortzis
Single Letter Expression of Capacity for a Class of Channels with Memory. CoRR (2017)
Charalambos D. Charalambous, Nasir Uddin Ahmed
Team Optimality Conditions of Distributed Stochastic Differential Decision Systems With Decentralized Noisy Information Structures. IEEE Trans. Autom. Control. 62 (2) (2017)
Photios A. Stavrou, Jan Østergaard, Charalambos D. Charalambous, Milan S. Derpich
Zero-Delay Rate Distortion via Filtering for Unstable Vector Gaussian Sources. CoRR (2017)
Charalambos D. Charalambous, Christos K. Kourtellaris, Ioannis Tzortzis
Signalling of information in networked stochastic dynamical control systems. CDC (2017)
Charalambos D. Charalambous, Christos K. Kourtellaris, Sergey Loyka, Ioannis Tzortzis
The capacity of unstable dynamical systems-interaction of control and information transmission. ISIT (2017)
Charalambos D. Charalambous, Christos K. Kourtellaris, Ioannis Tzortzis
Information Transfer of Control Strategies: Dualities of Stochastic Optimal Control Theory and Feedback Capacity of Information Theory. IEEE Trans. Autom. Control. 62 (10) (2017)
Photios A. Stavrou, Jan Østergaard, Charalambos D. Charalambous, Milan S. Derpich
An upper bound to zero-delay rate distortion via Kalman filtering for vector Gaussian sources. ITW (2017)
Christos K. Kourtellaris, Ioannis Tzortzis, Charalambos D. Charalambous
Two-letter capacity formula for channels with memory and feedback. ITW (2017)
Charalambos D. Charalambous, Christos K. Kourtellaris, Ioannis Tzortzis
Hierarchical decomposition of optimal control and information strategies in control-coding capacity of stochastic systems. CDC (2017)
Charalambos D. Charalambous, Christos K. Kourtellaris, Ioannis Tzortzis
Hierarchical optimality of linear controllers-encoders-decoders operating at control-coding capacity of LQG control systems. CDC (2017)
Nasir Uddin Ahmed, Charalambos D. Charalambous
Erratum: Stochastic Minimum Principle for Partially Observed Systems Subject to Continuous and Jump Diffusion Processes and Driven by Relaxed Controls. SIAM J. Control. Optim. 55 (2) (2017)
Sergey Loyka, Charalambos D. Charalambous
A General Formula for Compound Channel Capacity. IEEE Trans. Inf. Theory 62 (7) (2016)
Sergey Loyka, Charalambos D. Charalambous
Feedback does not increase the capacity of compound channels with additive noise. ISIT (2016)
Sergey Loyka, Charalambos D. Charalambous
Rank-Deficient Solutions for Optimal Signaling Over Wiretap MIMO Channels. IEEE Trans. Commun. 64 (6) (2016)
Sergey Loyka, Charalambos D. Charalambous
Feedback Does Not Increase the Capacity of Compound Channels with Additive Noise. CoRR (2016)
Charalambos D. Charalambous
Decentralized sufficient & necessary optimality conditions for cooperative stochastic differential decision problems. CDC (2016)
Ioannis Tzortzis, Charalambos D. Charalambous, Themistoklis Charalambous, Christos K. Kourtellaris, Christoforos N. Hadjicostis
Robust Linear Quadratic Regulator for uncertain systems. CDC (2016)
Christos K. Kourtellaris, Charalambos D. Charalambous
Information structures of capacity achieving distribution for channels with memory and feedback. ISIT (2016)
Sergey Loyka, Charalambos D. Charalambous
A General Formula for Compound Channel Capacity. CoRR (2016)
Photios A. Stavrou, Themistoklis Charalambous, Charalambos D. Charalambous
Filtering with fidelity for time-varying Gauss-Markov processes. CDC (2016)
Sergey Loyka, Charalambos D. Charalambous
Rank-Deficient Solutions for Optimal Signaling over Wiretap MIMO Channels. CoRR (2016)
Sergey Loyka, Charalambos D. Charalambous
Optimal Signaling for Secure Communications Over Gaussian MIMO Wiretap Channels. IEEE Trans. Inf. Theory 62 (12) (2016)
Charalambos D. Charalambous, Christos K. Kourtellaris, Ioannis Tzortzis
Information transfer in stochastic optimal control with randomized strategies and directed information criterion. CDC (2016)
Photios A. Stavrou, Charalambos D. Charalambous, Christos K. Kourtellaris
Sequential Necessary and Sufficient Conditions for Capacity Achieving Distributions of Channels with Memory and Feedback. CoRR (2016)
Photios A. Stavrou, Charalambos D. Charalambous, Christos K. Kourtellaris
Sequential Necessary and Sufficient Conditions for optimal channel input distributions of channels with memory and feedback. ISIT (2016)
Charalambos D. Charalambous, Photios A. Stavrou
Directed Information on Abstract Spaces: Properties and Variational Equalities. IEEE Trans. Inf. Theory 62 (11) (2016)
Sergey Loyka, Charalambos D. Charalambous
Optimal Signaling for Secure Communications over Gaussian MIMO Wiretap Channels. CoRR (2016)
Photios A. Stavrou, Themistoklis Charalambous, Charalambos D. Charalambous
Filtering with Fidelity for Time-Varying Gauss-Markov Processes. CoRR (2016)
Ioannis Tzortzis, Charalambos D. Charalambous, Themistoklis Charalambous
Infinite horizon discounted dynamic programming subject to total variation ambiguity on conditional distribution. CDC (2016)
Charalambos D. Charalambous, Christos K. Kourtellaris, Sergey Loyka
Capacity Achieving Distributions & Information Lossless Randomized Strategies for Feedback Channels with Memory: The LQG Theory of Directed Information-Part II. CoRR (2016)
Charalambos D. Charalambous
Decentralized optimality conditions of stochastic differential decision problems via Girsanov's measure transformation. Math. Control. Signals Syst. 28 (3) (2016)
Charalambos D. Charalambous, Christos K. Kourtellaris
Information Structures of Extremum Problems of Feedback Capacity for General Channels with Memory. CoRR (2016)
Sergey Loyka, Charalambos D. Charalambous
A general formula for compound channel capacity. ISIT (2015)
Ioannis Tzortzis, Charalambos D. Charalambous, Themistoklis Charalambous
Dynamic Programming Subject to Total Variation Distance Ambiguity. SIAM J. Control. Optim. 53 (4) (2015)
Sergey Loyka, Charalambos D. Charalambous
An Algorithm for Global Maximization of Secrecy Rates in Gaussian MIMO Wiretap Channels. IEEE Trans. Commun. 63 (6) (2015)
Sergey Loyka, Charalambos D. Charalambous
Novel Matrix Singular Value Inequalities and Their Applications to Uncertain MIMO Channels. IEEE Trans. Inf. Theory 61 (12) (2015)
Christos K. Kourtellaris, Charalambos D. Charalambous, Joseph J. Boutros
Nonanticipative transmission for sources and channels with memory. ISIT (2015)
Christos K. Kourtellaris, Charalambos D. Charalambous
Information Structures of Capacity Achieving Distributions for Feedback Channels with Memory and Transmission Cost: Stochastic Optimal Control & Variational Equalities-Part I. CoRR (2015)

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Publication Activity (10 Years)

Top Topics

Top Venues

Charalambos D. Charalambous