He received his B.S. degree from the National Technical University of Athens (1967) and M.S. (1969) and Ph.D. (1971) degrees from Princeton University, all in Electrical Engineering. He has been at the University of Maryland since 1971 and currently holds a joint appointment as Professor in the Electrical Engineering Department and in the Institute of Systems Research (ISR) of which he is a founding member. He is co-founder of the NASA Center for Commercial Development of Space on Hybrid and Satellite Communications Networks established in 1991 at Maryland as an off-shoot of the ISR. He served as Co-Director of that Center from 1991 to 1994.
He was a Visiting Professor in 1978 at the National Technical University in Athens, Greece and in 1979 at the EECS Department of the University of California, Berkeley and at INRIA, France. During 1985-1986 he was on leave at MIT and ETH in Zurich, Switzerland. He was the General Chairman of the 1986 IEEE Conference on Decision and Control in Athens, Greece and the 1991 IEEE International Symposium on Information Theory in Budapest, Hungary. He also organized two workshops on Information theory in 1984 (Hot Springs, VA) and 1999 (Metsovo, Greece). He was the Technical Program Co-Chair of the IEEE INFOCOM in New York City in 1999 and the IEEE International Symposium on Information theory in Sorrento, Italy in 2000.
He has also been the Director of the Fairchild Scholars and Doctoral Fellows Program, an academic and research partnership program in Satellite Communications between Fairchild Industries and the University of Maryland. He won the IEEE Donald E. Fink Prize Paper Award (1992) and he was the first recipient of the Sigmobile Award of the ACM (Association of Computer Machinery) for contributions to wireless communications in 1997. He has been the President of the Information Theory Society of the IEEE (1987) and has served on its Board of Governors almost continuously from 1981 until the present. He was elected to the Board of Directors of the IEEE in 1989 and 1990.
Dr. Ephremides has authored or co-authored over 100 technical journal papers and 300 technical conference presentations. He has also contributed chapters to several books and edited numerous special issues of scientific journals. He has also won awards from the Maryland Office of Technology Liaison for the commercialization of products and ideas stemming from his research. He has served on the Editorial Boards of the IEEE Transactions on Automatic Control, IEEE Transactions on Information theory, the Journal of Wireless Networks, and the International Journal of Satellite Communications.
He has been the Dissertation Supervisor of over twenty Ph.D. students who now hold prominent positions in academia, industry, and research labs. He is the founder and President of Pontos, Inc., a Maryland company that provides technical consulting services since 1980.
Dr. Ephremides' interests are in the areas of communication theory, communication systems and networks, queueing systems, signal processing, and satellite communications. NSF, NASA, ONR, ARL, NRL, NSA, and Industry have continuously supported his research since 1971.
He has served in many capacities in the IEEE and other organizations, from local organization posts to President of the Information Theory Society and member of the Institute Board of Directors, including Technical Program Chair and General Chair of Major Conferences.
Dr. Ephremides and his wife Jane are also known for their philanthropic contributions to the Clark School of Engineering and the Department of Electrical and Computer Engineering. You can read about their work in this Engineering @ Maryland article from Fall 2022.
Honors and awards
• Distinguished University Professor
• U.S. Naval Research Laboratory Alan Berman Research Publication Award (2007)
• IEEE Information Theory Society Aaron Wyner Distinguished Service Award (2006)
• Kirwan Research and Scholarship Prize, University of Maryland (2002)
• IEEE Millennium Medal (2000)
• ISR Outstanding Systems Engineering Faculty Award, University of Maryland (2000)
• ACM/SIGMOBILE Award for Outstanding Contributions to Research on Mobility of Systems, Users, Data, and Computing (1997)
• George Corcoran Award for Faculty, ECE Department (1978)
• IEEE Communications Society Distinguished Lecturer
• IEEE Fellow
• President of the IEEE Information Theory Society
• President of the Information Theory Society
• Member, IEEE Institute Board of Directors
IEEE Information Theory Society Matters
On this page Dr. Ephremides includes views, facts, articles, opinions, etc. pertaining to the IEEE Information Theory Society, which he has been a member of since 1968. The page includes his "Historian's Columns" for the society.
All aspects of communications systems (information theory, communication theory, multi-user systems, communication networks, satellite systems) with focus on energy efficiency and cross-layer approaches to design; systems theory, stochastic systems, optimization, signal processing, wireless communications, age of information, and other related, or unrelated, subjects.
Institute of Electrical and Electronics Engineers (IEEE)
- Fellow, 1984
- Matrix spectral factorization for data compression, filtering, wireless communications, and radar systems
- Method and System for Cooperative Transmission in Wireless Multi-Hop Networks
- Group TDMA frame allocation method and apparatus
- Power Control-Based Admission Methods for Maximum Throughput in DS-CDMA Networks with Multimedia Traffic
- Integrated Method for Performing Scheduling, Routing and Access Control in a Computer Network
- Power Control for Active Link Quality Protection in CDMA Networks
- Capacity enhancement for multi-code CDMA with integrated services through quality of services and admission control
- Method and device for placement of transmitters in wireless networks
- NSF: CIF: CR: On the Fundamental Nature of the Age of Updates
- ONR: Age of Information: Concept, Metric and Tool for Network Control
- NSF Collaborative Research: Theoretical Foundation of Distributed Wireless Channel Access
- Energy-Efficient Cognitive Networking
- Throughput Rates, Capacities, and Ultimate Capabilities for Wireless Networks with Bursty Traffic
- Cooperative Networking across the Layers
- NSF Collaborative Research: Systematic Optimization in Wireless Multicasting
- Wireless networks
- Twenty Five Years of Wireless Networks
- Cooperation in Wireless Networks
- Optimal Power and Rate Control for Proportional Fairness in Time-Varying Wireless Networks
- Impact of Probabilistic Neighbor Discovery on Performance of Sensor Networks
- Optimal rate control policies for proportional fairness in wireless networks
- Network coding of packets for multicast over a time-varying communication channel
- Source Coding and Parallel Routing
- Joint Multi-Access and Routing as a Stochastic Game for Relay Channel
- Power Levels and Packet Lengths in Random Multiple Access with Multi-Packet Reception Capability
- Standard and Quasi-Standard Stochastic Power Control Algorithms
- Joint Scheduling and Routing Algorithm for Ad-Hoc Wireless Networks
- A Game Theoretic Look at Joint Multi Access, Power and Rate Control
- Energy Efficient Power Control for Wireless Queueing Networks
- Energy Efficient Collision Resolution in Wireless Ad Hoc Networks
- Distributed Routing and Scheduling in Resource-Limited Wireless Ad Hoc Networks with Connectionless Traffic
- Power Control in Uplink and Downlink CDMA Systems with Multiple Flow Types