Dr Photios A. Stavrou

Photios (Photis) A. Stavrou received his Diploma in Electrical and Computer Engineering from the Department of Electrical and Computer Engineering (ECE), Aristotle University of Thessaloniki (AUTH) in 2008. He was awarded his Ph.D degree in Electrical Engineering from the Department of ECE, University of Cyprus (UCY) in 2016. From November of 2016 to October of 2017, he was a Postdoc at the Department of Electronic Systems at Aalborg University in Denmark . As of November of 2017, he is a Postdoc at the Department of Information Sciences and Engineering at KTH Royal Institute of Technology in Sweden .

His main research interests target the design and analysis of wireless networked control systems. The study of such systems necessitates the interplay between dynamical systems and their communication aspects. Toward this end, his research can be characterized as interdisciplinary because it combines tools from control and estimation theories, communications, and convex optimization. Specifically, his research spans the following areas:

Properties of information measures in systems with memory and feedback like for example, functional properties of directed information and conditional directed information and their utility in investigating the extremums of feedback capacity and causal rate distortion.
Causal and Zero-Delay processing of information in systems with feedback. For example, the fundamental limits of causal rate distortion theory in systems with memory.
Low-delay joint source-channel coding. For example, the joint source-channel coding between a source with memory and a channel with feedback and their distortion-cost trade-offs.
Feedback capacity in communications. For example, the necessary and sufficient conditions for deriving closed form expressions of unknown channels with memory and feedback.
Communication for control. For example, quantization and rate performance of unstable sources with memory in closed loop systems.

News:

July 2018 - Accepted journal paper entitled "Optimal estimation via nonanticipative rate distortion function and application to time-varying Gauss-Markov processes" in SIAM Journal on Control and Optimization.
July 2018 - Accepted conference paper entitled "Asymptotic reverse-waterfilling solution of nonanticipative rate distortion function for vector-valued Gauss-Markov sources" in IEEE Conference on Decision and Control (CDC).
June 2018 - Accepted journal paper entitled "Zero-delay rate distortion via filtering for vector-valued Gaussian sources" in IEEE Journal of Selected Topics in Signal Processing (special issue on information theoretic methods of data acquisition, analysis, and processing).
February 2018 - Accepted 2 conference papers entitled (''On zero-delay source coding of LTI Gauss-Markov systems with covariance matrix distortion constraints'' and ''Directed information subject to a fidelity: applications to conditionally Gaussian processes'') both in European Control Conference.
December 2017 - Accepted conference paper entitled "Fixed rate zero-delay source coding for stationary vector-valued Gauss-Markov sources" in Data Compression Conference.
November 2017 - Accepted journal paper entitled "Finite-time nonanticipative rate distortion function for time-varying scalar-valued Gauss-Markov sources" in IEEE Control Systems Letters.

Recent Activities:

June 2018 - Talks: European Control Conference, Limassol, Cyprus.
November 2017 - Talk: Information Theory Workshop , Kaohsiung, Taiwan.
June 2017 - Talk: School of Electrical Engineering, Department of Electrical Engineering and Automation, at Aalto University, Helsinki.
June 2017 - Short Visit: School of Electrical Engineering, Department of Electrical Engineering and Automation, at Aalto University, Helsinki.
May 2017 - Talk: Symposium on Information Theory and Signal Processing in the Benelux (SITB2017), Delft, The Netherlands.