Overview

Research Topics

Research Projects

Infrastructure

Scientific Contributions

Research Prototypes

Wireless Coffee Seminar

Broadband Wireless & Sensor Networks Research Area

Scientific Contributions

Professor G.S. Yovanof
In addition to academic work, Dr. Gregory Yovanof’s professional career includes an over twenty-year tenure in the high-tech industry in the greater Asia-Pacific region. With responsibilities in the RTD and business development domains, he has developed an expertise in the research, design and development of broadband communication systems and the production of ASIC chips and multimedia devices. Prior to joining AIT in 2002, he worked as a staff scientist at the Eastman Kodak Research Labs and Hewlett-Packard Laboratories, engaged over a period of nine years in multimedia signal processing for computer peripheral devices. While at Eastman Research Labs, he contributed to the design and development of high performance communication systems for deep space communications, e.g., the communication link with the Hubble-telescope. As the co-inventor of a patent on “Fixed-Rate JPEG Still Image Compression", he contributed to the design and development of the first digital camera that HP produced in the mid-90’s. Data compression and image processing algorithms that he developed at HP Labs found their way into several of the multifunctional computer peripheral devices developed by HP (laser-jet, inkjet & large-format printers, scanners, copiers and digital cameras). At Cyclonics Inc., Gregory, as the Director of Multimedia, led a multinational team developing a DVD-data controller chip (including Demodulation, Error-Correction, DVD Navigation, & embedded CPU). This chip reached mass-market production volume and gained several market awards for its performance; it was used by AKAI Corp. of Japan in the award-winning DV-P4000 DVD-player. While at Bitmath Inc., Gregory, as a co-founder and VP of Business Development, was responsible for growing the technology portfolio and expanding the company’s scope to enter the broadband and optical communications markets. He managed a team that developed a PHY level Forward Error Correction (FEC: a concatenation of Reed-Solomon and BCH codes) IP block for the then emerging 40 Gbps optical networking market.
At AIT, Gregory has been focusing on the theoretical underpinnings of the management of innovation (both at the corporate and the national/regional level, with clusters of innovation), and the commercialization of novel technologies, systems and services. He has co-designed, organized and coordinated the launching of a Master’s level program in the “Management of Business, Innovation and Technology” – MBIT, and currently serves as the MBIT Academic Program Director.

• Co-recipient of an HP Labs award for his contributions to the first HP Digital Camera (“rate-control compression algorithms).
• Senior Member of the IEEE.
• Recipient of four approved patents
• Listed in the Marquis Who's Who in Science & Engineering, the Marquis Who's Who in the World, and Lexington's Who's Who.
• Member of the Technical Chamber of Greece
• Served on the Board of Directors of Hellas Online S.A.
• Senior Member of the IEEE.
• Patents
  
  – G.S. Yovanof, A. Drukarev, "Fixed-Rate JPEG Still Image Compression," European Patent 96306012.4-1241, US Patent 5,677,689, Oct. 14, 1997.
  – K. Konstantinides, B. Natarajan, G.S. Yovanof, "Method of filtering images using image compressibility to determine threshold parameter", US Patent 5,787,209 (July 28, 1998), and US Patent 6,016,366 (Jan 18, 2000).

Professor C. B. Papadias
Constantinos B. Papadias was a co-inventor of the “Space-Time Spreading (STS)” transmit diversity scheme that was adopted by the cdma-2000 3rd generation cellular standard as an optional transmit diversity mode for voice communication (contribution 3GPP2-C30-19990817-014, accepted Sept. 1999).
He has received more than 2000 citations for his research work (see e.g. Google scholar). His paper with A. Paulraj "Space-Time Processing for Wireless Communications", [J2] was recognized in 2006 as "the most highly cited paper in wireless networks" over the last decade by Essential Science Indicators (ESI)
He was awarded the IEEE Signal Processing Society’s Young Author Best Paper Award, (year: 2003, topic “Signal Processing for Communications”) for paper [J8].
He was editor in the book, “Space-Time Wireless Systems: From Array Processing to MIMO Communications” (co-edited with H. Bolcksei, D. Gesbert, and A. van der Veen), by Cambridge Press, June 2006, ISBN 052185105X and is the co-author of an upcoming book on system-level MIMO.

• The Technical Coordinator of the EU-FP7 FET Project CROWN (in the area of cognitive radio systems).
• Co-recipient of the Bell Labs President’s Gold award for his contributions to the Bell labs LAyered Space-Time (BLAST) project (“signal processing algorithms”).
• Recipient of the IEEE Signal Processing Society’s Young Author Best Paper Award (2003).
• Co-recipient of the Central Bell Labs Teamwork Award (for founding and contributing to the FP5 project FITNESS)
• Recipient of nine approved patents
• Cited in Marquis Who’s Who in the World
• A technology expert by the Greek Secretariat of Research and Technology, responsible for the European Commission’s 7th Framework Programme (FP7) specific program “IDEAS” for the period 2007-2009.
• Senior Member of the IEEE
• Member of the Technical Chamber of Greece
• Member of the “Signal Processing for Communications” Technical Committee of the IEEE Signal Processing Society and serves as the Committee’s Industrial Liaison.
• Member of the Steering Board of the Wireless World Research Forum (WWRF), representing Lucent Technologies. Served as the board’s R&D issue manager
• Associate Editor in the IEEE Transactions on Wireless Communications
• Associate Editor in the Journal of Communication Networks (published in Korea)

Professor A. Kalis
Dr. Antonis Kalis is an associate professor of AIT and an adjunct professor of Carnegie Mellon University. He received his Electrical Engineering Diploma degree in 1997 from the EE Department of the University of Patras, Greece, and joined the Lab of Electromagnetics at the University of Patras, participating in various R&D projects for the Greek Government and the European Union, as research staff. In 2000 he worked as a Research Engineer and an Assistant Research Unit Manager the Computer Technology Institute. He received his PhD from the University of Patras, in June 2002. His research interests are in the areas of radio communications, antenna design and wireless networks. He has numerous journal and conference publications, a US patent, and the 2000 IEEE Chester Sall Memorial Award in the above areas. Antonis Kalis is a member of the Technical Chamber of Greece, and the IEEE.

• Member of the IEEE
• Member of the AFCEA
• Reviewer of scientific conferences
• Awards
  – Kennametal Fellowship Award 2004
  – Chester Sall Award 2000
• Patents
• – Kalis, T. Antonakopoulos, V. Makios, U.S. Provisional Patent Application, "ANTENNA SYSTEM", reference number: 27589.4, October 2001
• Invited Speeches 
  – "Engineering as a source of Science", CTTC, July 2009
  – "Beamspace-MIMO: Extending the capacity limits of wireless communications using a single transceiver", Bell-Labs, December 2007, Princeton University, December 2007, Carnegie Mellon University, December 2007
  – "Introduction to the Concept of Aerial Entropy and Modulation", University of Piraeus, February 2005
  – "Applying Smart Antennas in Sensor Networks",University of Piraeus, March 2004, University of Trento, July 2004

Professor S. Vassilaras

Dr. Spyridon (Spyros) Vassilaras, is with AIT since November 2003, first as a postdoctoral researcher and since September 2006 as an Assistant Professor. He obtained his Ph.D. in Computer Engineering from Boston University in 2001 (Ph.D. adviser Prof. Yannis Paschalidis). Prof. Vassilaras is currently teaching two MSITT cources: Data Networks (co-instructed with Prof. D. Klonidis) and Wireless Networks and supervising a number of Theses. While at AIT, he has been conducting research in various areas of telecommunications networks and participating in a number of collaborative research projects funded by the European Commision. His research results have been published in numerous scientific journal and conference papers as well as book chapters. Dr. Vassilaras is an avid chess player (current national ELO 1540) and wishes he had more time to devote to chess. You can view his Academic Genealogy Tree here.  

• Member of the Technical Chamber of Greece
  
• Reviewer of scientific conferences
  
• Invited Speeches
  

– Towards Measurement-Based Quality of Service Provisioning in Multimedia Telecommunication Networks", August 2001, Motorola, Arlington Heights, Illinois.

– "Importance Sampling for the Estimation of Buffer Overflow Probabilities via Simulation", February 2001, Nokia Research Center, Burlington, Massachusetts.

– "Estimating buffer overflow probabilities from measurements", June 2000, Nokia Research Center, Burlington, Massachusetts.