2011 Poster Sessions : Cognitive Interference Networks with Partial and Noisy Observations: a Learning Framework

Student Name : Marco Levorato
Advisor : Andrea Goldsmith
Research Areas: Information Systems
A learning framework for the optimization of transmission strategies in cognitive networks with reactive primary users is proposed. In the reactive setting, the temporal evolution of the primary users' network is a function of the strategy of the secondary user. In order to optimize its own performance while bounding the performance degradation incurred by the primary users, the secondary user needs to learn the dependence between its strategy and the statistics of the stochastic process modeling the primary users' network. However, in practical scenarios, only a subset of the features of the state of the network may be observable at any given time. The secondary user, thus, cannot locate the exact state of the network, but can identify a region of the state space in which the current state lies. In order to deal with partial and imperfect observability of the state of the network, in the proposed framework the secondary user learns on a pre-constructed observation space, which incorporates individual states as well as state aggregates corresponding to observable features. A primal dual algorithm with a gradient estimator is used to solve the constrained optimization problem.

Marco Levorato (S'06, M'09) was born in Venice, Italy, in 1980. He obtained both the BE (Electronics and Telecommunications Engineering) and the ME (Telecommunications Engineering) summa cum laude from the University of Ferrara, Italy, in 2002 and 2005, respectively. In 2009, he received a PhD in Information Engineering from the University of Padova. He is a post doctorate researcher at Stanford and the University of Southern California (USC) under the supervision of Prof. Andrea Goldsmith and Prof. Urbashi Mitra. His research interests include: control and modeling of cognitive and interference networks, transmission protocol modeling and error control techniques, cooperative communications, multiantenna communications He is author or co-author of 45 technical papers either published or accepted for publication major in international journals and conferences. He is a Member of the IEEE and IEEE Communications Society. He is also serving as a reviewer for IEEE Trans. on Information Theory, IEEE Trans. on Communications, IEEE Trans. on Wireless Communications, IEEE Trans. on Networking, IEEE Trans. on Mobile Computing and the major IEEE Conferences