The Odyssey of Communications and Networking in the Black Sea Region Continues

IEEE Logo

               

Keynote Speakers

picture

Hikmet Sari

SUPELEC
Plateau de Moulon, 3 Rue Joliot Curie, Gif sur Yvette, France
Wednesday, May 28, 2014

Multiple Access and Power Efficiency in Wireless Communications

Abstract

In this talk, we will first give a brief review of some major advances in multicarrier transmission and multiple access techniques, which shaped the development of the wireless communications standards that came into existence over the past decade. The review includes the development of OFDM and single-carrier transmission with frequency-domain equalization (SC-FDE) as well as the birth of OFDMA and of single-carrier FDMA (SC-FDMA), which were adopted by the Mobile WiMAX and the 3GPP LTE standards. We report the results of a comparison between OFDMA and SC-FDMA on a linear channel using different code rates in the channel encoder. Next, we address the nonlinear distortion problems caused by the high-power amplifier (HPA) at the transmitter in wireless communications systems and describe the various techniques devised to compensate for this phenomenon in single-carrier and multicarrier transmission. We emphasize the fact that the optimum operating point of the power amplifier cannot be always achieved in practice due to the stringent spectral masks imposed. We describe ideal signal predistortion that is applicable to both single-carrier and multicarrier systems and then we discuss peak-to-average power ratio (PAPR) reduction for multicarrier systems. We point out a recent result that the gain achieved in terms of PAPR does not translate in terms of transmitted signal power for a given power amplifier.

Short Biography

Hikmet Sari is a Professor and Head of the Telecommunications Department at SUPELEC, France, and Chief Scientist of Sequans Communications. Previously, he held research and management positions at Philips, SAT, Alcatel, Pacific Broadband Communications, and Juniper Networks. He received his Engineering Diploma and Ph.D. from the ENST, Paris, France, and the Habilitation degree from the University of Paris-Sud, Orsay. Dr. Sari has served as an Editor of the IEEE Transactions on Communications, Guest Editor of the European Transactions on Telecommunications, Guest Editor of IEEE JSAC, Associate Editor of the IEEE Communications Letters, Chair of the Communication Theory Symposium of ICC 2002, Technical Program Chair of ICC 2004, Vice General Chair of ICC 2006, General Chair of PIMRC 2010, General Chair of WCNC 2012, Chair of the GITC in 2010 – 2011, Distinguished Lecturer of the IEEE Communications Society (2001 - 2006), Member of the IEEE Fellow Evaluation Committee (2002 - 2007), and Member of the Awards Committee (2005 – 2007) of this society. He is currently serving as Executive Chair of WCNC 2014, Executive Vice-Chair of ICC 2016, Executive Chair of ICC 2017, and Vice-President – Conferences of the IEEE Communications Society for 2014 – 2015. His distinctions include the IEEE Fellow Grade and the Andre Blondel Medal in 1995, the Edwin H. Armstrong Award in 2003, the Harold Sobol Award in 2012, and election to the European Academy and to the Science Academy of Turkey in 2012.

[Back to Program]

picture

Howard Benn

Samsung Electronics R&D Institute, United Kingdom
Thursday, May 29, 2014

Millimeter Wave as a Key New Element in 5G Cellular Networks

Abstract

As the mobile telecommunications industry starts wide-scale deployment of LTE-Advanced systems it is time to start the research and development of the next generation of the mobile internet – 5G. The exact definition of 5G is still open, like all the previous generational steps is will consist of many elements from a move to a virtualised core network to a new air interface. This keynote will consider the pressures on the current LTE based systems, and investigate the possibility of using the 27 – 40 GHz band from theory, to channel measurements and an introduction the Samsung’s demonstrator system. Finally it will provide challenges to the research community for areas we need more work in.

Short Biography

Howard started his career in the fixed telecommunication sector (Plessey) back in 1982, did his degree and PhD at Bradford University, moving into radio based communications in 1989. As one of the fathers of GSM he started working in ETSI GSM standards committees in 1993, helping create 3GPP and chairing 3GPP RAN 4 from 1998 to 2007. He has been a board member of ETSI since 2008, a member of the ICANN Nomcom in 2013, and a member of the Strategy Advisory Board for the UK 5G innovation centre at Surrey University. His current role is “Head of Standards and Industrial Relations” for Samsung Electronics R&D Institute in the UK, managing a team of engineers covering ETSI, 3GPP, ATSC, GSMA. His team are also very active in the EU Horizon 2020 program with a focus on the 5G PPP activities.

[Back to Program]

picture

Murat Uysal

Ozyegin University, Istanbul, Turkey
Thursday, May 29, 2014

Optical Wireless Communications - Opportunities, Challenges and Solutions

Abstract

Today, the term "wireless" is used almost synonymously with radio-frequency (RF) technologies as a result of the wide-scale deployment and utilization of wireless RF devices and systems. The RF band of the electromagnetic spectrum, spanning from around 30 kHz to 300 GHz, is fundamentally limited in capacity and costly, i.e., as most sub-bands are exclusively licensed. With the ever-growing popularity of data-heavy wireless communications, the demand for RF spectrum is outstripping supply and the time has come to seriously consider other viable options for wireless communication using the upper parts of the electromagnetic spectrum for applications where access to huge bandwidth is a requirement.

Utilization of the optical band of the electromagnetic spectrum for wireless transmission opens doors of opportunity in areas as yet largely unexplored. Optical frequencies range from 300 GHz to 300 petahertz (PHz) and include infrared, visible and ultraviolet bands – a spectral range that dwarfs the 300 GHz that the RF band represents. Optical wireless communication (OWC) systems offer significant technical and operational advantages such as higher bandwidth capacity, robustness to electromagnetic interference, inherent security, low power requirements and unregulated spectrum. Variations of OWC can be employed in a diverse range of communication applications ranging from very short-range (on the order of millimetres) optical interconnects within integrated circuits through outdoor inter-building links (on the order of kilometres) to satellite communications (larger than 10,000 kilometres)

. The first part of the talk will give an overview of OWC discussing advantages and application areas of this emerging technology. In the second part of talk, we will focus on outdoor OWC systems and present our research results on relay-assisted OWC transmission as an enabler for long-range links in the presence of atmospheric turbulence.

Short Biography

Murat Uysal is currently a Full Professor and Chair of the Department of Electrical and Electronics Engineering at Ozyegin University, Istanbul, Turkey. Prior to joining Ozyegin University, he was a tenured Associate Professor at the University of Waterloo, Canada, where he still holds an adjunct faculty position. Dr. Uysal's research interests are in the broad areas of communication theory and signal processing with a particular emphasis on the physical layer aspects of wireless communication systems in radio, acoustic and optical frequency bands. He has authored some 200 journal and conference papers on these topics and received more than 3000 citations. Prof. Uysal currently leads the EU COST Action OPTICWISE which is a consolidated European scientific platform for interdisciplinary research activities in the emerging area of optical wireless communications. He serves on the editorial boards of IEEE Transactions on Communications, IEEE Transactions on Vehicular Technology, Wiley Wireless Communications and Mobile Computing (WCMC) Journal, and Wiley Transactions on Emerging Telecommunications Technologies (ETT). In the past, he served as an Editor for IEEE Transactions on Wireless Communications and IEEE Communications Letters, Chair of the Communication Theory Symposium of IEEE ICC 2007, Chair of the Communications and Networking Symposium of IEEE CCECE 2008, Chair of the Communication and Information Theory Symposium of IWCMC 2011, TPC Co-Chair of IEEE IWOW 2012 and TPC Co-Chair of IEEE WCNC 2014. His distinctions include the Marsland Faculty Fellowship in 2004, NSERC Discovery Accelerator Supplement Award in 2008, University of Waterloo Engineering Research Excellence Award in 2010, and Turkish Academy of Sciences Distinguished Young Scientist Award in 2011 among others.

[Back to Program]


Contact Us

You are visitor:

since 18 June 2012.