Events Calendar

CSI Feedback Allocation in Multicell MIMO Channels

Speaker: Paul de Kerret, Eurecom Institute

Talk Title: CSI Feedback Allocation in Multicell MIMO Channels

Abstract: In this talk, we will discuss the joint precoding across K transmitters (TXs), sharing the knowledge of the user's data symbols to be transmitted towards K single-antenna receivers (RXs). We consider a distributed channel state information (DCSI) configuration where each TX has its own local estimate of the overall multiuser MIMO channel. The focus of this work is on the optimization of the allocation of the CSI feedback subject to a constraint on the total sharing through the backhaul network. Building upon the Wyner model, we derive a new approach to allocate the CSI feedback while making efficient use of the pathloss structure to reduce the amount of feedback necessary. We show that the proposed CSI allocation achieves good performance with only a linear scaling in the number of cooperating TXs instead of a quadratic scaling when the CSI is shared to all the TXs, thus making the joint transmission from a large number of TXs more practical than previously thought.



Biography: Paul de Kerret was born in 1987 in Paris, France. In 2009, he graduated from the Ecole Nationale Supérieure des Télécommunications de Bretagne, France. Via a double degree program, he continued his studies in Munich and obtained a diploma degree in electrical engineering from Munich University of Technology (TUM), Germany. Furthermore, he also earned a four year degree in mathematics at the Université de Bretagne Occidentale, France in 2008. From January 2010 to September 2010, he has been a research assistant at the Institute for Theoretical Information Technology, RWTH Aachen University, Germany. Since October 2010, he is pursuing a doctorate at Eurecom Institute under the supervision of David Gesbert. The thesis is focused on the cooperation of transmitters in interference limited wireless networks. Some of his research interest are MIMO networks, multiuser information theory, and distributed optimization.

Host: Prof. Urbashi Mitra, ubli@usc.edu, x04667

Location: Hughes Aircraft Electrical Engineering Center (EEB) - 539

Audiences: Everyone Is Invited

Contact: Gerrielyn Ramos