Enhancing Secrecy with Sectorized Transmission in Decentralized Wireless Networks

Xi Zhang (Hong Kong University of Science and Technology)

APPLIED SIGNAL PROCESSING SERIES

DATE: 2013-07-25
TIME: 11:00:00 - 12:00:00
LOCATION: RSISE Seminar Room, ground floor, building 115, cnr. North and Daley Roads, ANU
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ABSTRACT:
The recently emerged physical-layer security techniques can provide significant secrecy enhancements to the existing wireless systems. To achieve secrecy, previous studies have introduced artificial noise into decentralized wireless networks, creating non-resolvable interference to the malicious eavesdroppers. With a single transmit antenna, some legitimate users have to stop their own message transmission, in order to deliver artificial noise.

As a means of exploiting the benefits of having multiple transmit antennas, we propose to use sectorized transmission such that information signal and artificial noise can be transmitted in different sectors simultaneously, while no legitimate users must stop message transmission. By carefully inspecting the outage/throughput performance, our analysis indicates that considerable secrecy enhancements can be achieved by the proposed transmission scheme.

BIO:
Xi Zhang received the B.E. degree in the School of Communication and Information Engineering from the University of Electronic Science and Technology of China in 2010. He is currently a Ph.D. candidate at the Department of Electronic and Computer Engineering in the Hong Kong University of Science and Technology. His research interests are in the fields of wireless communication and signal processing techniques, including physical-layer security, ad-hoc networking and random matrix theory.