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Cooperative Precoding and Artificial Noise Design for Security over Interference Channels

Ayca Ozcelikkale (Institutionen för signaler och system, Signalbehandling) ; T. M. Duman
IEEE Signal Processing Letters (1070-9908). Vol. 22 (2015), 12, p. 2234-2238.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Beamforming, linear precoder, multi-user, multi-terminal, secrecy, security, jamming, MMSE, mean-square error, QoS constraints, cooperative strategies, multiple-antenna

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Denna post skapades 2015-09-28. Senast ändrad 2016-01-21.
CPL Pubid: 223283


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