[CPCC] Seminar by Prof. Constantinos Papadias
Hamid Jafarkhani
hamidj at uci.edu
Thu Oct 6 13:46:35 PDT 2016
Title: Low complexity antenna arrays and techniques for wireless
communication and sensing
Speaker: Prof. Constantinos Papadias
Date: Oct. 7, 2016, Fri
Time: 9:15 AM
Venue: McDonnell Douglas Engineering Auditorium (MDEA)
ABSTRACT
In this talk we will provide an overview of recently developed
techniques in the area of compact antenna arrays that have fewer radio
frequency (RF) chains than elements. These arrays comprise of both
conventionally fed active antennas and passive ones that radiate due to
the mutual coupling from neighboring elements. By using load control
circuits, the mutual coupling between adjacent elements can be exploited
in order to produce the desired radiation patterns. Compared to
conventional antenna arrays, which require one RF chain per element,
these systems have a clear double benefit: they require fewer RF chains,
making them cheaper and less power-consuming; and they occupy a smaller
volume, due to the small inter-element distances needed for strong
mutual coupling. However, it is not always straightforward to design
the mixed analog-digital circuit logic that can produce arbitrary (e.g.
channel-dependent) beams or other types of spatial multiplexing and
precoding. A number of recent advances in this direction will be
provided, including techniques for closed-loop MIMO transmission, as
well as multi-user precoding. The corresponding applications range from
MIMO handsets to small cell access points and remote radio heads to
Massive arrays. The use of such low-complexity arrays in cognitive radio
networks and other spectrum sharing systems is another important
application that will be emphasized. The talk will conclude with the
presentation of a number of recent over-the-air experiments and demos
performed at AIT's Broadband Wireless & Sensor Networks (B-WiSE)
Research Lab that showcase the benefits of these systems in various
setups, which underline their potential for next-generation wireless
devices and networks.
SPEAKER'S BIOGRAPHY
ConstantinosB. Papadiasis the Dean of Athens Information Technology
(AIT), in Athens, Greece, where he is also Professor and Head of its
Broadband Wireless and Sensor Networks (B-WiSE) Research Group. He is
also Adjunct Professor at Aalborg University in Denmark. He received the
Diploma of Electrical Engineering from the National Technical University
of Athens (NTUA) in 1991 and the Doctorate degree in Signal Processing
(highest honors) from the EcoleNationaleSupérieuredes
Télécommunications(ENST), Paris, France, in 1995. He was a researcher at
InstitutEurécom(1992-1995), Stanford University (1995-1997) and Bell
Labs (as Member of Technical Staff from 1997-2001 and as Technical
Manager from 2001-2006). He was also Adjunct Professor at Columbia
University (2004-2005) and Carnegie Mellon University (2006-2011). His
research interests span several areas of advanced communication systems,
with emphasis on wireless, cognitive, green and next generation
networks. He has published over 170 papers, one research monograph, two
edited books, 6 book chapters, and has received over 6000 citations for
his work. He has also made standards contributions and holds 12 patents.
He was a member of the Steering Board of the Wireless World Research
Forum (WWRF) from 2002-2006, a member and industrial liaison of the
IEEE's Signal Processing for Communications Technical Committee from
2003-2008 and a National Representative of Greece to the European
Research Council's IDEAS program from 2007-2008. He has served as member
of the IEEE Communications Society's Fellow Evaluation and Awards
Comities, as well as an Associate Editor for the IEEE Transactions on
Signal Processing, the IEEE Transactions on Wireless Communications and
the Journal of Communications and Networks. He has participated in
several European Commission research grants, including the Horizon2020
project SANSA in the area of satellite-assisted wireless backhauling and
another two FP7 research projects where he acts as Technical
Coordinator: HARP, in the area of remote radio heads, and ADEL, in the
area of licensed shared access. His distinctions include the Bell Labs
President's Award (2002); a Bell Labs Teamwork Award (2003); the IEEE
Signal Processing Society's Young Author Best Paper Award (2003); ESI's
"most cited paper of the decade" citation in the area of wireless
networks (2006); his recognition as a "Highly Cited Greek Scientist"
(2011); and the co-authorship of two papers that earned Best Student
Paper Awards at the IEEE International Conference on Bioinformatics and
BioEngineering(2013 & 2014). He was a Distinguished Lecturer of the IEEE
Communications Society for 2012-2013. Dr. Papadiasis a Member of the
Technical Chamber of Greece and a Fellow of IEEE.
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