In cognitive radio networks, the radio access from opportunistic users depends on their capabilities to detect spectrum holes. Typically, the detection problem has been considered separately from the optimization of the transmission strategy. However, in a CRcontext, the detection phase has a strong impact on network efficiency as well as on the undesired interference generated towards licensed users. Furthermore, sensing from a single location may be affected by shadowing. The goal of this talk is to tackle both issues by proposing a decentralized collaborative sensing strategy and a joint optimization of detection thresholds, sensing time and power allocation across multichannel links, in order to maximize the aggregated opportunistic throughput, under a constraint on the interference generated towards the primary users.
Sergio Barbarossa received the M.Sc. and the Ph.D. in electrical engineering from the University of Rome ``La Sapienza'', Rome, Italy, where he is now a full professor.
He has held positions as research engineer at Selenia SpA (1984-86), at the Environmental Institute of Michigan (1988) and visiting professor at the University of Virginia (1995 and 1997), the University of Minnesota (1999), and he has taught short graduated courses at the Polytechnic University of Catalonia (2001 and 2009). He has been the principal investigator in several international projects funded by the European Union. He has been the scientific coordinator of the European Project WINSOC, on wireless sensor networks, and he is the scientific coordinator of the European Project FREEDOM, on femtocell networks.
He is currently involved in the European Project SIMTISYS, on the monitoring of maritime traffic from constellations of satellites and in the design of the radar system to be used for the landing module of ExoMars, a spacecraft to be launched by the European Space Agency to land on Mars.
He has been a member of the IEEE Signal Processing for Communications Technical Committee (1998-2004) and he served as an Associate Editor of the IEEE Transactions on Signal Processing (1998-2001 and 2004-2006). He has been a plenary speaker at SAM 2008 and SPAWC 2009 and a tutorial speaker at EUSIPCO 2011.
He has co-edited a special issue of the IEEE Journal on Selected Areas in Communications on Optimization of MIMO Transceivers for Realistic Communication Networks: Challenges and Opportunities and a special issue of the EURASIP Journal of Applied Signal Processing on MIMO Communications and Signal Processing. He received the 2000 IEEE Best Paper Award from the IEEE Signal Processing Society and the 2010 EURASIP Technical Achievements Award for his contributions on radar, communications and networks. He is an IEEE Fellow. He is the author of a research monograph titled ``Multiantenna Wireless Communication Systems.'' His h-index is 38. His current research interests lie in the areas of cognitive and femtocell networks, bio-inspired signal processing, sensor networks, cooperative communications, and distributed decision.