Cooperative precoding and artificial noise design for security over interference channels
Author
Özçelikkale, A.
Duman, T. M.
Date
2015Source Title
IEEE Signal Processing Letters
Print ISSN
1070-9908
Publisher
Institute of Electrical and Electronics Engineers Inc.
Volume
22
Issue
12
Pages
2234 - 2238
Language
English
Type
ArticleItem Usage Stats
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Abstract
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. © 1994-2012 IEEE.
Keywords
Beamformingmulti-user
Beamforming
Mean square error
Network layers
Gaussian interference channels
Interference channels
Linear pre-coding
Multi-user
Nonconvex problem
Semidefinite relaxation
Total mean-square errors
Signal interference