Cooperative Precoding and Artificial Noise Design for Security over Interference Channels

Ayca Özçelikkale, Tolga M. Duman

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


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.

Original languageEnglish (US)
Article number7219401
Pages (from-to)2234-2238
Number of pages5
JournalIEEE Signal Processing Letters
Issue number12
StatePublished - Dec 1 2015
Externally publishedYes


  • Beamforming
  • multi-user
  • secrecy

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering
  • Applied Mathematics


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