Abstract: Cognitive radios are envisaged to be a key enabling technology for dynamic spectrum access in future wireless networks. In this talk, we will address the following two issues in cognitive radios. 1) Spectrum sensing and secondary user's throughput trade-off: under an outage constraint on the probability of detection, we derive the spectrum sensing time which maximizes the secondary user's throughput. We focus on energy detection. The optimum design is carried out for different channel fading conditions (Nakagami-m). 2) Derivation of outage probability (OP) and throughput of a primary user, while operating in the presence of an ad hoc cognitive radio network (CRN): after a statistical modelling of the interference, we investigate the optimal signal to interference ratio (SIR) threshold which maximizes the primary’s throughput and the optimal medium access probability (MAP) for the secondary network which satisfies the primary’s desired quality of service (QoS) constraints. The analysis enables us to optimally design parameters for a CRN to minimize the OP or maximize the throughput and ergodic capacity of the primary user.
Biography: Mounir Ghogho received his PhD degree in 1997 from the National Polytechnic Institute, Toulouse, France. He was a Research Fellow with the University of Strathclyde from September 1997 to November 2001. Since December 2001, he has been a faculty member with the school of Electronic and Electrical Engineering at the University of Leeds, where he is currently a Professor. He is also currently a Professor of the International University of Rabat. His research interests are in signal processing, wireless communications and sensor networks. He served as an associate editor of the IEEE Signal Processing Letters from December 2001 to December 2004, as an associate editor of the IEEE Transactions on Signal Processing from August 2005 to August 2009, and as a member of the IEEE SPCOM TC from Jan 2005 to Dec 2008. He is currently a member of the IEEE SPTM TC. He was the General Cochair of IEEE SPAWC2010; the Technical Cochair of the MIMO Symposium of IWCMC 2007 and IWCMC 2008; a Technical Area Cochair of Eusipco 2008, Eusipco 2009, and ISCCSP 2005; and a guest coeditor of the EURASIP JWCN special issue on Synchronization for Wireless Communications and the Elsevier Physical Communications special issue on Advances in MIMO-OFDM. He was awarded a five-year Royal Academy of Engineering Research Fellowship in September 2000.