报告题目：Artificial-Noise-Aided Secure Transmission in Wiretap Channels with Transmitter-Side Correlation
报告日期及时间：2016年11月11日上午10点
报告地点：B403
报告人： Dr. Shihao Yan
报告人单位： University of New South Wales
报告人简介: Dr. Shihao Yan received the Ph.D degree in Electrical Engineering from The University of New South Wales, Sydney, Australia, in 2015. He received the B.S. in Communication Engineering and the M.S. in Communication and Information Systems from Shandong University, Jinan, China, in 2009 and 2012, respectively. He was a visiting Ph.D student at The University of South Australia, Adelaide, Australia, in 2014. He is currently a Postdoctoral Research Fellow in the Research School of Engineering, The Australia National University, Canberra, Australia. His current research interests are in the areas of wireless communications and statistical signal processing, including physical layer security, location verification, and covert communication.
摘要: This talk presents the study on the impact of transmitter-side correlation on the artificial-noise-aided secure transmission, based on which a new power allocation strategy for artificial noise (AN) is devised for physical layer security enhancement. Specifically, we design a correlation-based power allocation (CPA) for AN, of which the optimality in terms of achieving the minimum secrecy outage probability is analytically proved in the large system regime with the number of transmit antennas approaching infinity. In order to fully reveal the benefits of the CPA, we derive easy-to-evaluate expressions for the secrecy outage probability achieved by the CPA. Our study demonstrates that the CPA is nearly optimal and significantly outperforms the widely-used uniform power allocation (UPA) even for a moderately small number of correlated transmit antennas. Furthermore, our numerical results reveal a fundamental difference between the CPA and UPA. That is when the number of correlated transmit antennas increases, the secrecy outage probability of the CPA always reduces while the secrecy outage probability of the UPA suffers from a saturation point.
邀请人：王骞教授
