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

Signals and Systems, Signalbehandling och medicinsk teknik, Signal Processing

T. M. Duman

Bilkent Universitesi

IEEE Signal Processing Letters

1070-9908 (ISSN)

Vol. 22 2234-2238 7219401

Areas of Advance

Information and Communication Technology

Subject Categories

Signal Processing

DOI

10.1109/LSP.2015.2472275