Dr. Samir M. Perlaza
Dr. Samir M. Perlaza
INRIA, France
Title: On the Benefits of Feedback in Wireless Communications

In this talk, the key role of feedback is highlighted in two fundamental problems: (a) interference management in wireless networks; and (b) simultaneous wireless energy and information transmission. In the former, channel-output feedback is shown to be instrumental in increasing the capacity of the Gaussian interference channel due to the fact that it induces a kind of transmitter cooperation. Interestingly, this cooperation appears naturally given the broadcast nature of wireless channels independently of whether or not transmitters intend to cooperate. Thus, despite the nature of the network, i.e., centralized or decentralized, there always exists a non-negligible benefit when using channel output feedback. In the latter, channel-output feedback is shown to be beneficial when several transmitters intend to transmit information to a set of destinations and energy to an energy harvester. In this case, also known as the interference channel with energy harvester, all information and energy rates that are achievable are fully described with and without feedback. In the centralized case, channel-output feedback can at most double the energy rate given a fixed information rate. In the decentralized case, depending on the decoding scheme at the receiver, channel-output feedback allows the achievability of some Pareto optimal network equilibrium operating points.


Samir M. Perlaza is a research scientist with the Institut National de Recherche en Informatique et en Automatique (INRIA), France, and a visiting research collaborator at the School of Applied Science at Princeton University (NJ, USA). He received the M.Sc. and Ph.D. degrees from École Nationale Supérieure des Télécommunications (Telecom ParisTech), Paris, France, in 2008 and 2011, respectively. Previously, from 2008 to 2011, Dr. Perlaza was a Research Engineer at France Télécom - Orange Labs (Paris, France). Dr. Perlaza has held long-term academic appointments at the Alcatel-Lucent Chair in Flexible Radio at Sup\'{e}lec (Gif-sur-Yvette, France); at Princeton University (Princeton, NJ) and at the University of Houston (Houston, TX). Dr. Perlaza has been awarded by the European Commission with an Alban Fellowship in 2006 and a Marie Sklodowska-Curie Fellowship in 2015. He was also one of the recipients of the the Best Student Paper Award at Crowncom in 2009. His research interests lie in the overlap of signal processing, information theory, game theory and wireless communications.

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