Confidential communication in downlink beamforming

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Title:	Confidential communication in downlink beamforming
Author:	Vázquez, Miguel Ángel; Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A.
Other authors:	Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. A&MP - Grup de Processament d'Arrays i Sistemes Multicanal
Abstract:	This paper deals with the problem of secure transmission in downlinkbeamforming. In this scenario, a base station, which usually serves information to an amount of users, wants to transmit a confidential message to one of the users. Focusing on the beamforming solution, we derive all possible weighted solutions. With this, each non-intended receiver has an im- portance factor and, therefore, the resulting beamformer is able to properly reconfigure its secure transmission varying the weighting factors. This deri vation is done via multicrite- ria optimization, which allows us to transform a quasiconvex problem into a semidefinite one and, thus, reduce the compu- tational complexity. Numerical results show the performance of the method.
Abstract:	Peer Reviewed
Subject(s):	-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Comunicacions mòbils -Wireless communication systems -Comunicació sense fil, Sistemes de
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Document type:	Article - Published version Conference Object
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