The Impact of Quasi-equally Spaced Sensor Layouts on Field Reconstruction

Wednesday, October 29 _Time: 12:00 Noon
Location: Room 1007, Eng III
(Civil & Environmental Eng.)

Speaker: Prof. Emanuele Viterbo

The Impact of Quasi-equally Spaced Sensor Layouts on Field Reconstruction

We consider wireless sensor networks whose nodes are randomly deployed and, _thus, provide an irregular sampling of the sensed field. The field is assumed _to be bandlimited; a sink node collects the data gathered by the sensors and _reconstructs the field by using a technique based on linear filtering. _By taking the mean square error (MSE) as performance metric, we evaluate the _effect of quasi-equally spaced sensor layouts on the quality of the reconstructed signal. _The MSE is derived through asymptotic analysis for different sensor _spatial _distributions, and for two of them we are able to obtain an _approximate closed form expression. _The case of uniformly distributed sensors is also _considered for the sake of comparison. _The validity of our asymptotic analysis is shown by comparison against _numerical results _and it is proven to hold even for a small number of nodes. _Finally, with the help of a simple example, we show the key role that _our results play in the deployment of sensor networks.
Biography

Emanuele Viterbo was born in Torino, Italy, in 1966. He received his degree (Laurea) in Electrical Engineering in 1989 and his Ph.D. in 1995 in Electrical Engineering, both from the Politecnico di Torino, Torino, Italy. From 1990 to 1992 he was with the European Patent Office, The Hague, The Netherlands, as a patent examiner in the field of dynamic recording and error-control coding. Between 1995 and 1997 he held a post-doctoral position in the Dipartimento di Elettronica of the Politecnico di Torino in Communications Techniques over Fading Channels. He became Associate Professor at Politecnico di Torino, Dipartimento di Elettronica in 2005 and since November 2006 he is Full Professor in Dipartimento di Elettronica, Informatica e Sistemistica (DEIS) at Universit della Calabria, Italy. In 1993 he was visiting researcher in the Communications Department of DLR, Oberpfaffenhofen, Germany. In 1994 and 1995 he was visiting the cole Nationale Suprieure des Tlcommunications (E.N.S.T.), Paris. In 1998 he was visiting researcher in the Information Sciences Research Center of AT&T Research, Florham Park, NJ. In 2003 he was visiting researcher at the Maths Department of EPFL, Lausanne, Switzerland. In 2004 he was visiting researcher at the Telecommunications Department of UNICAMP, Campinas, Brazil. In 2005 he was visiting researcher at the ITR of UniSA, Adelaide, Australia. Dr. Emanuele Viterbo was awarded a NATO Advanced Fellowship in 1997 from the Italian National Research Council. His main research interests are in lattice codes for the Gaussian and fading channels, algebraic coding theory, algebraic space-time coding, digital terrestrial television broadcasting, and digital magnetic recording. He is Associate Editor of /IEEE Transactions on Information Theory, European Transactions on Telecommunications/ and /Journal of Communications and Networks.