Anja SKRIVERVIK, École Polytechnique Fédérale de Lausanne, Switzerland
Anja Skrivervik obtained her electrical engineering degree from École Polytechnique Fédérale de Lausanne in 1986, and her PhD from the same institution in 1992, for which she received the Latsis award. After a stay at the University of Rennes as an invited Research Fellow and two years in the industry, she returned part time to EPFL as an Assistant Professor in 1996, and is now a Professeur Titulaire at this institution.
Her teaching activities include courses on microwaves and antennas. Her research activities include electrically small antennas, implantable and wearable antennas, multifrequency and ultra wideband antennas, numerical techniques for electromagnetics and microwave and millimeter wave MEMS. She is author or co-author of more than 100 scientific publications.
She is very active in European collaboration and European projects. She was the chairperson of the Swiss URSI until 2012, a Board member of the European School on Antennas and a member of the board of the Center for High Speed Wireless Communications of the Swedish Foundation for Strategic Research.
Abstract - An overview of W-BAN antennas designed at LEMA
W-BAN applications have been around since a long time, but have been experiencing a tremendous growth during the last decades. This results in the need of dedicated antennas, which are designed and optimized taking into account their lossy surroundings. Design considerations and several examples will be presented in this paper.
Adrian POPESCU, Blekinge Institute of Technology, Sweden
Adrian POPESCU is a professor at Blekinge Institute of Technology in Karlskrona, Sweden. He holds two PhD degrees in Electrical Engineering, one from the Polytechnical Institute of Bucharest, Romania, in 1985 and another from the Royal Institute of Technology, Stockholm, Sweden in 1994.
He has also the Docent degree in computer sciences from the Royal Institute of Technology, Stockholm, Sweden (2002). He is a Full Professor in the School of Computing, Blekinge Institute of Technology, Karlskrona, Sweden. His main research interests include green networking, cognitive radio networks, seamless roaming, overlay and ad-hoc routing, content distribution networks, traffic measurements, modeling and analysis.
He has a strong research activity as a result of his involvement in diverse Swedish and European research projects (EUREKA MOBICOME, EU FP7 PERIMETER, Euro-NGI Routing in Overlay Networks, Euro-NG Networking over Cognitive Radio Networks, Swedish Internetfonden ROVER, Swedish VINNOVA Performance Analysis of Internet Applications, etc).
He is the author and co-author of almost two hundred publications in different journals, books and conferences. He is a senior member of ACM and also member of IEEE and IEEE CS.
The creation and the distribution of video content is a multi-stage process that refers to the aquisition of video source, content production and packaging, and distribution to customers. The major components are the access networks, metro/edge networks, core networks, data centers and storage networks.
Today, the access networks, of type wireless and wired, dominate the power consumption of the chain. However, it is expected that, with increasing access speeds, the core network routing will dominate the power consumption of the chain as well. Furthermore, it is also expected that the power consumption of Data Centers (DCs) and Content Distribution Networks (CDNs) will be dominated by the power consumption of data storage for content that is infrequently downloaded as well as by the transport of data for content that is frequently downloaded.
The paper provides an overview of the problems related to the greening of IP-based video distribution, with particular focus on recent developments and the associated challenges. These are research topics planned to be solved by the last call Celtic-Plus project proposal CONVINcE (Consumption OptimizatioN in Video Networks). This research project has received the EUREKA Celtic-Plus label for funding approval in five European countries: France, Sweden, Finland, Romania and Turkey. It is considered to be a very high quality research and the topic is considered to be very relevant to our future from ecological and economical view.
Safwan EL ASSAD, University of Nantes, France
Safwan El Assad received his PhD degree in electrical engineering from the University of Lille 1, France in 1987. His doctoral thesis was on electromagnetic compatibility. He joined the University of Nantes, France in September 1987, where he is now an Associate Professor. From 1988 to 1996, his main area of research was in radar imaging, remote sensing, signal and images processing. From 1996 until 2002, he developed topics in digital communications, adaptive equalization for digital channels by neural network, and e-learning.
His current research area is focus on chaos-based information hiding and security including: Chaos-based crypto and crypto-compression systems; chaos-based watermarking and stegangraphy systems. He has supervised 9 PhDs (Current 3) and 21 Master students.
He worked on 4 European projects and he published (as an author, co-author) 3 patents, 26 papers in international journals, 1 book, 4 book-chapters and 85 articles in international conferences.
Applications: Transactions Security, IP security over satellite DVB, UMTS security, UWB security, WIFI security, wireless network security, copyright, data integrity.
A variety of chaos-based cryptosystems have been investigated during the last decade. Most of them are based on the structure of Fridrich which is based on the traditional confusion-diffusion architecture proposed by Shannon. Compared with traditional cryptosystems (DES, AES, etc…), the chaos-based cryptosystems are more flexible, more modular and easier to be implemented, which make them more suitable for large scale-data encryption such as images and videos.
The heart of any chaos-based cryptosystem is the chaotic generator and so, a part of the efficiency (robustness, speed) of the system depends greatly on it. In this talk, we give an overview of the state of the art of chaos-based block ciphers and we describe some of our schemes already proposed.
Also, we will focus on the essential characteristics of the digital chaotic generator that we published in October 2011 as a French patent and also we published in 2013 an extension of the patent in Europe, China, Japan and USA (see below). The needed performance of a chaos-based block cipher in terms of security level and speed of calculus depends on the used application. There is a compromise between the security and the speed of the calculation. The security on block ciphers will be analyzed.
“Generator of chaotic Sequences and corresponding generating system WO Patent WO/2011/121,218,2011”. PCT Extension to Europe: EP-2553567 A1, February 2013; China: CN-103124955 A, May 2013; Japan: JP-2013524271 A, June 2013; United States: US-20130170641, July 2013.
Paul COTAE, University of the District of Columbia, USA
Dr. Paul Cotae is a Full Tenured Professor in the Department of Electrical and Computer Engineering of the School of Engineering and Applied Science at the University of the District of Columbia (UDC) in Washington D.C., USA. He received a Dipl. Ing. and a M.S. degree in communication and electronic engineering in 1980 from the Technical University of Iassy and a Ph.D. degree in telecommunications from “Politechnica” University of Bucharest, Romania in 1991. He also received a Master in Applied Mathematics in 1998 from the University of Colorado at Boulder.
From 1984 to 2001, he was with the Department of Electrical Engineering, Technical University of Iassy, Romania, where he conducted research and teaching in the area of digital communications as a Professor at the same department. He was a Fulbright Scholar at the University of Colorado at Colorado Springs during 1993-1994. From 2002 to 2008 he was with the Department of Electrical and Computer Engineering at the University of Texas at San Antonio (UTSA). Since 2008, he has been with the University of the District of Columbia in Washington DC, USA.
His research is in the area of digital information theory, underwater communications, wireless sensor networks, and wireless mobile communication systems including 4G communication technologies, performance analysis, system design at the physical layer, and the design of advanced communication algorithms. He has authored or coauthored more than 120 papers in these areas and 4 books. He has been selected as ASEE Fellow by the Naval Research Laboratories in Washington DC, during 2009 - 2013. Dr. Paul Cotae received more than $2.5 million for his research and his external research grants as a main PI were funded by NSF, AFOSR, USAF and DoD.
Dr. Paul Cotae served as an Associate Editor for the IEEE Communication Letters (2003-2012). He has been since 2007 an associate Editor of the ELSEVIER International Journal of Computers & Electrical Engineering. He was a guest editor for the EURASIP Journal on Advances in Signal Processing: Special Issue on Distributed Signal Processing Techniques for Wireless Sensor Networks (2007) and guest co-editor of ELSEVIER International Journal of Computers & Electrical Engineering guest special issue on Wireless Systems: Modeling, Monitoring, Transmission, Performance Evaluation and Optimization, Vol.39, Issue 6, August 2013.
Dr. Paul Cotae is a Senior Member of IEEE, member of ASEE, member of HKN (Eta Kappa Nu) and SIAM. He is cited in Who’s Who in American Education, Who’s Who in America, and in Who’s Who in the World. Dr. Paul Cotae is the past Chair of the IEEE Washington Section (2011), Past Chair of the IEEE Communication Chapter, Washington Section (2010). He is the recipient of the 2011 IEEE ComSoc Chapter Achievement Award and 2011 IEEE ComSoc Chapter of the Year award.
He has been nominated as an Expert on Electronics and Telecommunication for the Romanian National Research Council, September 2010 and September 2011. He was invited to present some results of his research at the Macao University, Naval Research Laboratory in Washington DC, University of Akron, University of Texas at Austin, Texas A&M University, Rice University and University of Houston.
Dr. Paul Cotae is appointed in the Board of Governors of the IEEE ComSoc as Chair of Governance Committee during 2014-2015. He is the Executive Chair of the IEEE Globecom Conference to be held in Washington DC in 2016.
Doppler shift estimation and detection for target localization and tracking in underwater wireless communication (UWC) has been a major topic of research and investigation due to the increasing use of aquatic channels by national and private institutions. Most importantly, Doppler shift estimation has been of interest in military applications. The need for Doppler shift estimation in UWC exists mostly for real time remote control monitoring of oceanic activities: environmental monitoring, scientific data collection, and tracking and locating objects.
In this presentation, we focus on the non-data aided (blind) Doppler estimation and compensation techniques of the Doppler shift caused by relative motion assumed to be the same on each hydrophone receiver in a SIMO context.
We propose three new blind methods: 1) squaring time phase recovery method, 2) power spectrum method and 3) partial autocorrelation method. In order to compare the performances of these new methods with previous ones, we used real data.
The proposed methods require less hardware, are faster and easy to implement. We give the theoretical framework and contributions, Matlab results with real and simulation data for non data aided symbol timing recovery schemes and algorithms.
Our study is based on the data collected from our experiments. We analyzed the data collected from the experiment using non-data aided techniques such as Power Spectrum analysis, Autocorrelation, and Squaring Time Phase Recovery (Oerder & Meyr) to estimate Doppler shift in collaborative distributed underwater sensor networks.
Algorithms for various tasks have been discussed with an emphasis on non-coherent approaches. The results, based on experiments with real data, are provided as the final outcome of the work, which elaborates the insights into the nature of the problems. Issues, challenges and directions for future research are also identified.
Copyright © 2013-2014, COMM 2014. All Rights Reserved.