Cognitive Radio Challenges and Opportunities
by Joseph Mitola III, Stevens Institute of Technology, Hoboken, New Jersey, USA
Opening Keynote: Monday, 22nd June 2009
Joseph Mitola III.
Software defined radio is a foundation for cognitive radio which today has to do primarily with dynamic spectrum. However, as wireless devices continue to become more ubiquitous and as each device includes up to a dozen RF band-mode combinations, heterogeneous system on chip (SoC) architectures are emerging. This talk will characterize the evolution of cognitive radio from a SoC perspective, with observations on the way in which cognitive linguistics (a branch of the humanities) both informs the evolution of SoC and may become a basis for reducing the cost of SoC design. Cognitive linguistics also offers insights into the shortfalls of the semantic web as a basis for policy languages for cognitive radio. The conclusion is that interdisciplinary approaches to cognitive radio lead to sentient spaces in which a combination of embedded autonomy and user awareness leads to substantial advances in quality of experience.
Dr. Joseph Mitola is recognized internationally for his formulation and groundbreaking research in software-defined radio (SDR) and cognitive radio systems and technologies. In addition to having published the first technical paper on software radio architecture in 1991, Dr. Mitola has taught courses in software radio in the US, Europe, and Asia. As founding chair of the SDR Forum in 1996, he pioneered global innovation in SDR among industry, government, and academic research organizations. Later, his 1999 Licentiate Thesis in Teleinformatics, coined the term cognitive radio for the integration of machine perception of RF, visual and speech domains with machine learning into SDR to make dynamic spectrum access technically viable. His doctoral dissertation, /Cognitive Radio /[KTH, June 2000], created the first architecture for such autonomous radios, formulating the cognition cycle on which the sensing and opportunistic use of radio spectrum whitespace is based. In addition, Dr. Mitola serves on the Committee for Universal Radio Frequency Capabilities for the US Special Operations Command of the National Research Council of the National Academy of Sciences.
Before joining Stevens, Dr. Mitola served as Chief Scientist of the Department of Defense (DoD) Federally Funded R&D Center (FFRDC) for The MITRE Corporation, where he led program teams to invent novel solutions to critical DoD mission shortfalls in telecommunications and information processing. Between 2002 and 2005, he was on loan from MITRE to the US DoD to develop trustable cognitive systems for the US Defense Advanced Research Projects Agency (DARPA) as Special Assistant to the DARPA Director. From 1997 to 1999 he was founding Technical Director of Cryptologic Modeling and Simulation for the US DoD. Between 1994 and 1996, his MITRE role was General Systems Engineer for the US Defense Airborne Reconnaissance Office where he led the creation of the congressionally mandated strategy and was responsible for the transition of billions of dollars of legacy sensors, communications, and information systems to low cost mission effective modernized tactical distributed processing networks. In 1993 he served as Special Technical Advisor to the Executive Office of the President of the United States.
Dr. Mitola is the recipient of many awards including the Office of the Secretary of Defense Medal for Exceptional Public Service (2005) and the Inaugural Recipient of the SDR Forum Industry Achievement Award (2002). He has also served as the Editor in Chief, of the Radio Communications Series /IEEE Communications Magazine/ 1998-2003.
Dr. Mitola has also been appointed as Distinguished Professor holding a joint appointment at the Schaefer School of Engineering and Science and the School of Systems and Enterprises. He has published extensively in the area of cognitive radio and teleinformatics. He holds a BS in EE with Highest Honors (Northeastern University ‘72); MSE (The Johns Hopkins University ’74); Licentiate in Engineering (May, 99); and Doctorate in Teleinformatics (The Royal Institute of Technology, KTH, Stockholm) June, 2000.
Cognitive Radios in Overlay Systems
by Friedrich K. Jondral, Universität Karlsruhe, Germany
Keynote: Monday, 22nd June 2009
Friedrich K. Jondral
As emphasized by the results of recent measurement campaigns, the scarce resource called “spectrum” is underutilized. One of the reasons for this problem is the rigid regulation regime still valid for a vast frequency range.
A suitable approach to mitigate this scarcity is to use cognitive radios forming overlay or secondary users’ systems that employ those resources left idle by licensed or primary users’ systems. OFDM transmission turns out to be a good choice for secondary users’ systems because of its inherent flexibility in spectrum occupancy.
A problem of paramount importance pertaining to the admission of overlay systems is to ensure an extremely high probability for the detection of primary signals by the overlay system, because overlay cognitive radios should clear the frequency resource immediately when a licensed user signal appears. To enforce that an insufficient false alarm probability does not paralyze its performance, distributed detection may be introduced in the overlay system. The construction of the detector also depends on the secondary users’ system’s network type. We have to clearly distinguish centralized networks, which employ a coordinating access point, from ad hoc networks, where no single station is accentuated.
In order to enhance the detector’s performance it is possible to use inherent signal structures for the identification of primary signals. This can for example be done by applying air interface recognition that may be realized by exploitation of the primary signals’ cyclostationarity.
This keynote highlights the topics mentioned above and concludes that advanced spectrum utilization (and regulation) is a hot topic but should be handled with care.
Friedrich K. Jondral received a Diploma in mathematics and a Doctoral degree in natural sciences from the Technische Universität Braunschweig, Germany, in 1975 and 1979, respectively. During the winter semester 1977/78 he was a visiting researcher to the Department of Mathematics, Nagoya University, Japan. From 1979 to 1992 Dr. Jondral was an employee of AEG-Telefunken (now European Aeronautic Defence and Space Company, EADS), Ulm, Germany, where he held various research, development and management positions. His main activities during this time were in the fields of shortwave radio, signal analysis and radio direction finding. Besides his job, from 1981 to 1992 Dr. Jondral lectured on applied mathematics at the Universität Ulm where he was appointed Adjunct Professor in 1991. Since 1993 he has been Full Professor and Director of the Institut für Nachrichtentechnik at the Universität Karlsruhe (TH), Germany. Here, from 2000 to 2002, he served as the Dean of the Department of Electrical Engineering and Information Technology. During a sabbatical in the summer semester 2004, Dr. Jondral was a visiting faculty to the Mobile and Portable Radio Research Group of Virginia Tech, Blacksburg, VA. His current research interests are in the fields of ultra wideband communications, software defined and cognitive radio, signal analysis, pattern recognition, network capacity optimization and dynamic spectrum sharing.
Cognitive Radio: Reinventing the Future
by Linda Doyle,Trinity College, Dublin, Ireland.
Keynote: Tuesday, 23rd June 2009
We live in challenging times. The world faces a difficult economic period and this of course has implications in the telecommunications world as in every other aspect of business and technology. To survive we must be able to reinvent ourselves- think anew and become new. From a technology perspective ‘reinvention’ can be made more possible and more real in a world of cognitive networks and in a regulatory environment that strongly supports true technology and service neutrality. It is not just about being responsive to the changing radio environment or changing user patterns and demands – it is about responding to changing markets and changing opportunities. This talk focuses both on the way in which cognitive technology can support a highly dynamic technology and service neutral world and the regulatory challenges associated with this. There is much emphasis on plug and play networks and coexistence challenges. The talk also focuses on some key challenges that exist in moving cognitive radio research forward at an international level in a significant manner.
Linda Doyle is an Associate Professor at Trinity College Dublin, Ireland.
She leads a large research group in the Centre for Telecommunications Value-chain Research (CTVR). CTVR is multidisciplinary research centre that focuses on the design of future telecommunications networks and systems and has a strong emphasis on industry guided research. Professor Doyle’s research focuses on wireless networking, reconfigurable networks, cognitive radio, dynamic spectrum access networks and other novel spectrum management techniques. The research has a strong experimental aspect. Professor Doyle is vice-chair of the Technical Committee on Cognitive Networks (TCCN) of the IEEE Communications Society. She has just written a book on cognitive radio, "The Essentials of Cognitive Radio".