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There is now a CONTENT FREEZE for Mercury while we switch to a new platform. It began on Friday, March 10 at 6pm and will end on Wednesday, March 15 at noon. No new content can be created during this time, but all material in the system as of the beginning of the freeze will be migrated to the new platform, including users and groups. Functionally the new site is identical to the old one. webteam@gatech.edu
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Speaker: Dr. Urbashi Mitra
Title:
Identifiability for Bilinear Inverse Problems with (Eventual) Applications to Blind Deconvolution, Matrix Factorization and Dictionary Finding
Abstract:
A number of important inverse problems in signal processing such as blind deconvolution, matrix factorization, dictionary learning, and blind source separation share the common characteristic of being bilinear inverse problems. In such problems, the observation model is a function of two variables and conditioned on one variable being known. The observation is a linear function of the other variable. A key question is that of identifiability: can one unambiguously recover the pair of inputs from the output? We shall consider both deterministic conditions for identifiability as well as probabilistic statements that result in novel scaling laws under cone constraints. Our approach is based on a unifying and flexible approach to identifiability that exploits a connection to low-rank matrix recovery and lifting.
Bio:
Urbashi Mitra received B.S. and the M.S. degrees from the University of California at Berkeley and her Ph.D. from Princeton University. After a six-year stint at Ohio State University, she joined the Department of Electrical Engineering at the University of Southern California, Los Angeles, where she is currently a professor. She is a member of the IEEE Information Theory Society's Board of Governors (2002-2007, 2012-2014) and the IEEE Signal Processing Society’s Technical Committee on Signal Processing for Communications and Networks (2012-2014). Her achievements include: 2012 Globecom Signal Processing for Communications Symposium Best Paper Award, 2012 NAE Lillian Gilbreth Lectureship, USC Center for Excellence in Research Fellowship (2010-2013), USC Viterbi School of Engineering Dean’s Faculty Service Award (2009), 2009 DCOSS Applications & Systems Best Paper Award, the USC Mellon Mentoring Award (2008), IEEE Fellow (2007), Texas Instruments Visiting Professor (Fall 2002, Rice University), 2001 Okawa Foundation Award, 2000 OSU College of Engineering Lumley Award for Research, 1997 OSU College of Engineering MacQuigg Award for Teaching, and a 1996 National Science Foundation (NSF) CAREER Award.
Dr. Mitra has been/is an associate editor for the following IEEE publications: Transactions on Signal Processing (2012--), Transactions on Information Theory (2007-2011), Journal of Oceanic Engineering (2006-2011), and Transactions on Communications (1996-2001).
Dr. Mitra has held visiting appointments at the Delft University of Technology, Stanford University, Rice University, and the Eurecom Institute. She served as co-director of the Communication Sciences Institute at the University of Southern California from 2004-2007. Her research interests include: wireless communications, communication and sensor networks, detection and estimation and the interface of communication, sensing and control.
