题目：Secure MIMO AF Relaying Design under Imperfect Eavesdropper CSI: A Robust Optimization Framework

时间：7月5日（周二）上午10:00-12:00

地点：信电楼117/119

报告人：Professor  Benoit Champagne

McGill University, Montreal, Canada

Abstract

In this talk, we address the problem of secure amplify-and-forward (AF) relaying for multiple-input multiple-output (MIMO) relaying networks in the presence of multiple eavesdroppers. The emphasis is on a practical setting where only imperfect eavesdropper channel state information (ECSI) is available. A robust optimization framework is developed for the secure AF relay design where the general aim is to maximize the SINR at the destination under transmit power and secrecy constraints. The proposed framework covers three different types of models for the ECSI errors, that is: (1) deterministic norm-bounded; (2) random with Gaussian distribution; and (3) random with unknown distribution (i.e., known 1st and 2nd order moments). In each case, the resulting optimization problem for the AF relaying matrix design becomes non-convex. Suitable transformations and/or approximation techniques (e.g., S-procedure, difference of convex functions, semi-definite relaxation, etc.) are applied to develop efficient algorithmic solutions. The improved secrecy of the proposed transceiver designs against eavesdropping and their robustness to ECSI uncertainties is demonstrated through extensive numerical simulations. The joint optimization of the AF relaying matrix and artificial noise covariance matrix is also considered.

Biographies

Benoit Champagne is a Full Professor in the Department of ECE, McGill University. His research focuses on the study of advanced algorithms for the processing of communication signals by digital means. His interests span many areas of statistical signal processing, including detection and estimation, sensor array processing, adaptive filtering, and applications thereof to broadband communications and audio processing, where he has co-authored nearly 250 referred publications. His research has been funded by the Natural Sciences and Engineering Research Council (NSERC) of Canada, the “Fonds de Recherche sur la Nature et les Technologies” from the Govt. of Quebec, as well as some major industrial sponsors, including Nortel Networks, Bell Canada, InterDigital and Microsemi.  He has been an Associate Editor for the EURASIP J. on Applied Signal Processing from 2005 to 2007, the IEEE Signal Processing Letters from 2006 to 2008, and the IEEE Trans. on Signal Processing  from 2010 to 2012, as well as a Guest Editor for two special issues of the EURASIP J. on Applied Signal Processing published in 2007 and 2014, respectively. He has also served on the Technical Committees of several international conferences in the fields of communications and signal processing. In particular, he was Registration Chair, for IEEE ICASSP 2004, Co-Chair, Antenna and Propagation Track, for IEEE VTC–Fall 2004, Co-Chair, Wide Area Cellular Communications Track, for IEEE PIMRC 2011, Co Chair, Workshop on D2D Communications, for IEEE ICC 2015 and Publicity Chair, for IEEE VTC–Fall 2016. His is currently a Senior Member of IEEE.