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      Cooperative precoding and artificial noise design for security over interference channels

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      Author
      Özçelikkale, A.
      Duman, T. M.
      Date
      2015
      Source 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
      Article
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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
      Beamforming
      multi-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
      Permalink
      http://hdl.handle.net/11693/25924
      Published Version (Please cite this version)
      http://dx.doi.org/10.1109/LSP.2015.2472275
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      • Department of Electrical and Electronics Engineering 3637
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