18th European Wireless Conference - EW 2012

18-20 April 2012 - Poznań, Poland

European Wireless 2012 keynote speakers

Gordon Stüber

Georgia Institute of Technology,
Atlanta, USA

Geometrical Theory for Channel Depolarization

A geometrical theory is proposed for depolarization in narrow-band fixed-to-mobile and mobile-to mobile wireless channels. This novel theory is used to reveal the origin of channel depolarization and to provide a mechanism for computing cross-polarization discrimination (XPD). Based on the superposition of polarization components on conservation-of-polarization planes, a new three-dimensional (3-D) geometry-based reference model is proposed for XPD in narrow-band fixed-to-mobile and mobile-to-mobile wireless channels. This purely theoretical approach is used to derive the XPD without the aid of measurement data or its approximation. The geometrical theory and reference model provide a relationship between channel depolarization or XPD and channel modeling factors such as the distance between the transmitter and the receiver, the azimuth/elevation angles of arrival and departure, and the distribution of scatterers around the transmitter and/or receiver. Our geometry-based XPD model shows good agreement with previously reported empirical results from other authors, and provides insight on the detailed behavior observed in their XPD measurements.

Gordon L. Stüber received the B.A.Sc. and Ph.D. degrees in Electrical Engineering from the University of Waterloo, Ontario, Canada, in 1982 and 1986 respectively. In 1986, he joined the School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, where he holds the Joseph M. Pettit Chair in Communications. Dr. Stüber is author of the textbook Principles of Mobile Communication. He was co-recipient of the Jack Neubauer Memorial Award in 1997 for the best systems paper published in the IEEE Transactions on Vehicular Technology. He became an IEEE Fellow in 1999. In 2003, he received the IEEE Vehicular Technology Society James R. Evans Avant Garde Award. In 2007, he received the IEEE Communications Society Wireless Communications Technical Committee Recognition Award (2007) “for outstanding technical contributions in the field and for service to the scientific and engineering communities.” Dr. Stüber served as Technical Program Chair for many IEEE conferences. He is a past Editor for Spread Spectrum with the IEEE Transactions on Communications (1993-1998), and a past member of the IEEE Communications Society Awards Committee (1999-2002). He served as an elected Member-at-Large on the IEEE Communications Society Board of Governors (2007-2009), and is currently an elected member of the IEEE Vehicular Technology Society Board of Governors (2001-2003, 2004-2006, 2007-2009, and 2010-2012). He received the IEEE Vehicular Technology Society Outstanding Service Award in 2005.

Werner Mohr

Nokia Siemens Networks,
Munich, Germany

Mobile and wireless communications beyond LTE / IMT-Advanced - an industry view

Mobile broadband communication systems based on the LTE (Long-Term Evolution) standard are now being deployed globally. IMT-Advanced is a further evolution of LTE and is expected in the market around 2015. These systems will become major communication means for many Internet and video applications. According to ITU statistics, the number of cellular subscribers globally is approaching 6 billion. Data traffic is increasing continuously in communication networks. Video applications are driving that growth.

Information and communication technologies (ICT) will also increasingly be used to develop solutions for societal challenges such as smart energy systems, traffic, health, demographic and climate changes. Such systems will be based on a combination of machine-to-machine or sensor based systems with tens of billions of connected devices combined with wide-area communication networks. They will be part of global communication networks in the Future Internet. Scalability and radio systems from low data rates with potentially very low latency up to very broadband systems will be needed also for mission-critical applications.

It is expected that traffic in mobile communication networks will grow by a factor of 1000 from 2010 to 2020, which cannot be solved only by additional frequency spectrum for mobile and wireless communications. On the one hand, discussions are ongoing to prepare WRC 2016 (World Radiocommunications Conference) in order to identify additional frequency spectrum for mobile and wireless communications. While on the other, the research community is working to increase the system performance by an improved interference management, advanced antenna concepts, cooperative base stations, new means of spectrum usage as well as further developments on link level.

With respect to the growth of communication traffic energy consumption in communication networks and, in particular, in mobile communication networks, it is of major concern to reduce the CO2 footprint from ICT. Therefore, the system design with respect to the increased traffic, higher spectral efficiency and reduced energy consumption results in conflicting requirements. Heterogeneous systems with different cell types, which are interworking, will increasingly be deployed by means of self-organizing networks with a unified radio resource management to manage the increased complexity. Cognitive networks are complementing the future systems in order to reduce errors, improve quality and reduce operational and energy cost.

These challenges provide a set of design criteria for new systems such as peak data rate, spectral efficiency on system level, latency, fairness of access for users (user experience), cost per bit, scalability of throughput, energy consumption and backward compatibility to integrate new systems in the existing networks. Therefore, the research community has already started to discuss further system developments beyond IMT-Advanced for the time beyond 2020.

The Net!Works European Technology Platform is identifying respective research topics for collaborative framework research programs in the Net!Works Strategic Research Agenda.

This presentation will provide an overview of the future challenges from an industry perspective.

Werner Mohrwas graduated from the University of Hannover, Germany, with the Master Degree in electrical engineering in 1981 and with the Ph.D. degree in 1987.
Dr. Werner Mohr joined Siemens AG, Mobile Network Division in Munich, Germany in 1991. He was involved in several EU funded projects and ETSI standardization groups on UMTS and systems beyond 3G. Since December 1996 he was project manager of the European ACTS FRAMES Project until the project finished in August 1999. This project developed the basic concepts of the UMTS radio interface. Since April 2007 he is with Nokia Siemens Networks GmbH & Co. KG in Munich Germany, where he is Head of Research Alliances. He was the coordinator of the WINNER Project in Framework Program 6 of the European Commission, chairman of WWI (Wireless World Initiative) and of the Eureka Celtic project WINNER+. The WINNER project laid the foundation for the radio interface for IMT-Advanced and provided the starting point for the 3GPP LTE standardization. In addition, he was vice chair of the eMobility European Technology Platform in the period 2008 – 2009 and he is now eMobility (now called Net!works) chairperson for the period 2010 – 2011. Werner Mohr was chair of the "Wireless World Research Forum – WWRF" from its launch in August 2001 up to December 2003. He is member of VDE (Association for Electrical, Electronic & Information Technologies, Germany) and Senior Member of IEEE. 1990 he received the Award of the ITG (Information Technology Society) in VDE. He is board member of ITG in VDE, Germany for the term 2006 to 2008 and was re-elected for the term 2009 to 2011. Werner Mohr is co-author of a book on "Third Generation Mobile Communication Systems" and a book on "Radio Technologies and Concepts for IMT-Advanced".

Lajos Hanzo

University of Southampton,

The Fifth MIMO: Coherent vs Non-Coherent and Colocated vs Distributed Architectures

The spectacular success of Multiple-Input Multiple-Output (MIMO) wireless systems may be deemed to be a consequence of their ability to circumvent the logarithmic Shannon-capacity formula of classic single-input single-output (SISO) systems. This is, because their capacity may be deemed to increase linearly with the number of antennas, more precisely with MIN(M,N), where M and N are the number of transmit and receive antennas. Following a brief classification of MIMO schemes as diversity techniques, multiplexing schemes, multiple access arrangements and beamforming techniques, we introduce the family of multi-functional MIMOs. These multi-functional MIMOs are capable of combining the benefits of several MIMO schemes and hence attain an improved performance in terms of both their Bit Error Ratio (BER) as well as throughput.
However, MIMO detectors typically impose a high complexity as well as a high pilot-overhead, where MxN antenna-links have to be estimated. Indeed, for a high number of antennas and high mobile velocities their complexity may be deemed to become excessive. Hence their non-coherent detection aided counterparts will also be explored, which are capable of dispensing with channel estimation all together at a modest performance degradation.
Furthermore, in the presence of shadow-fading the now classic co-located MIMO elements are incapable of providing multiple independently faded replicas of the transmitted signal. This problem may be circumvented by employing relaying, distributed space-time coding or some other cooperation-aided procedure, as detailed in the lecture. One could also view the benefits of decode-and-forward based relaying as receiving and then flawlessly regenerating as well as re-transmitting the original signal from a relay - provided of course that the relay succeeded in detecting the original transmitted signal.
Finally, the novel family of Frequency- Space- Time-Shift Keying schemes will be introduced. Members of this newMIMO class are capable of satisfying all the above design specifications and will be explored in more detail...

Lajos Hanzo FREng, FIEEE, FIET, DSc, Fellow of EURASIP, (http://www-mobile.ecs.soton.ac.uk) received his first-class Master degree in electronics in 1976, his PhD in 1983 and his Doctor of Sciences (DSc) degree in 2004. In 2010 he received the ’Doctor Honaris Causa’ honorary doctorate. He co-authored 20 IEEE Press - John Wiley books totalling in excess of 10 000 pages on mobile radio communications, published 1200+ IEEE Xplore entries, organised and chaired major IEEE conferences, and has been awarded a number of distinctions. Lajos is also an IEEE Distinguished Lecturer and the Editor-in-Chief of the IEEE Press as well as a Chaired Professor at Tsinghua University Beijing. For further information on research in progress and associated publications please refer to http://www-mobile.ecs.soton.ac.uk;

Di Benedetto

University of Rome
La Sapienza,

Impulse Radio UWB with Time Reversal

This work investigates the use of Time Reversal (TR) applied to UWB systems for communication applications. Potential performance boosts, that are achievable over a single UWB communication link by the sole adoption of TR, are investigated. In the case of multiuser UWB communications, it is shown that TR modifies the distribution of Multi User Interference (MUI) and that further performance improvement can be obtained by adapting the receiver to the specific MUI distribution characteristics.

Maria-Gabriella Di Benedetto obtained her Ph.D. in Telecommunications in 1987 from the University of Rome La Sapienza, Italy. In 1991, she joined the Faculty of Engineering of University of Rome La Sapienza , where currently she is a Full Professor of Telecommunications at the Infocom Department. She has held visiting positions at the Massachusetts Institute of Technology, the University of California, Berkeley, and the University of Paris XI, France. In 1994, she received the Mac Kay Professorship award from the University of California, Berkeley. Her research interests include speech analysis and synthesis, and digital communication systems. From 1995 to 2000, she directed four European projects for the design of UMTS. Since 2000 she has been active in fostering the development of Ultra Wide Band (UWB) radio communications in Europe. Within the 5th EU Framework, she directed for the Infocom Dept. two European projects (whyless.com and UCAN) aimed at the design and implementation of UWB ad-hoc networks. Within the 6th EU Framework her "Networking with UWB" research group participates in the PULSERS Integrated Project that will integrate UWB research and development in Europe for the next years, and in the LIAISON Integrated Project as regards the application of UWB to location-based services. She currently also participates in the HYCON Network of Excellence. Dr. Di Benedetto was co-editor for the IEEE JSAC, the Journal of Communications and Networks, and the ACM/Springer Journal on Mobile Networks and Applications, of several special issues on UWB from radio to network. She recently completed the preparation of two new books on UWB that will be published by 2006: UWB Communication Systems – A comprehensive overview, with T. Kaiser, D. Porcino, A. Molisch, and I. Oppermann, Hindawi Publishing Corporation, 2006, and Ultra Wideband Wireless Communications, with H. Arslan and Z.N. Chen, John Wiley & Sons, Inc., 2006.! In June 2004, she co-authored with Guerino Giancola the seminal book Understanding Ultra Wide Band Radio Fundamentals that was published by Prentice Hall.

Erdal Arikan

Bilkent University,
Ankara, Turkey

Polar Coding: Theory and Potential for Applications

Polar coding is a recent method for constructing low-complexity codes that achieve the information-theoretic limits in a range source and channel coding scenarios. This first part of this talk will explain the theoretical ideas behind polar coding. The second part will present some experimental results that compare polar codes with the state-of-the-art codes and discuss the potential of polar codes for applications.

Erdal Arıkan was born in Ankara, Turkey, in 1958. He received the B.S. degree from the California Institute of Technology, Pasadena, in 1981, and the S.M. and Ph.D. degrees from the Massachusetts Institute of Technology, Cambridge, in 1982 and 1985, respectively, all in Electrical Engineering. In 1987, he joined the Electrical-Electronics Engineering Department of Bilkent University, Ankara, where he is at present a professor. His research interests are in information theory and coding. He was the recipient of the IEEE Information Theory Society Paper Award in 2011 for his work paper on channel polarization.