Cooperative Precoding and Artificial Noise Design for Security over Interference Channels
Journal article, 2015
We focus on linear precoding strategies as a physical layer technique for providing security in Gaussian interference channels. We consider an artificial noise aided scheme where transmitters may broadcast noise in addition to data in order to confuse eavesdroppers. We formulate the problem of minimizing the total mean-square error at the legitimate receivers while keeping the error values at the eavesdroppers above target levels. This set-up leads to a non-convex problem formulation. Hence, we propose a coordinate block descent technique based on a tight semi-definite relaxation and design linear precoders as well as spatial distribution of the artificial noise. Our results illustrate that artificial noise can provide significant performance gains especially when the secrecy levels required at the eavesdroppers are demanding.
MMSE
QoS constraints
multi-terminal
multiple-antenna
Beamforming
multi-user
linear precoder
security
secrecy
cooperative strategies
mean-square error
jamming
Author
Ayca Ozcelikkale
Chalmers, Signals and Systems, Signal Processing and Biomedical Engineering
T. M. Duman
Bilkent University
IEEE Signal Processing Letters
1070-9908 (ISSN) 15582361 (eISSN)
Vol. 22 12 2234-2238 7219401Areas of Advance
Information and Communication Technology
Subject Categories
Signal Processing
DOI
10.1109/LSP.2015.2472275