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Secrecy Sum-Rate for Orthogonal Random Beamforming With Opportunistic Scheduling
KTH, School of Electrical Engineering (EES), Signal Processing. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre. (Signal Processing)ORCID iD: 0000-0003-2298-6774
2013 (English)In: IEEE Signal Processing Letters, ISSN 1070-9908, E-ISSN 1558-2361, Vol. 20, 141-144 p.Article in journal (Refereed) Published
Abstract [en]

In this letter, we employ orthogonal random beamforming (ORBF) for the worst-case multi-user downlink scenario where each user is wiretapped by one eavesdropper. Two opportunistic scheduling techniques that ensure confidentiality by exploiting multi-user diversity are investigated; the first technique (optimal) requires limited feedback of the effective signal-to-interference ratio (SIR) from all the users and the eavesdroppers while the second technique (suboptimal) incorporates SIR knowledge from only the legitimate users. By using extreme value theory, we derive the achievable SIR-based secrecy sum-rate and the associated scaling laws for both scheduling techniques.

Place, publisher, year, edition, pages
2013. Vol. 20, 141-144 p.
Keyword [en]
Array signal processing, Downlink, Interference, Optimal scheduling, Security, Signal to noise ratio, Vectors, array signal processing, diversity reception, multi-access systems, scheduling, security of data, ORBF, extreme value theory, multiuser diversity, multiuser downlink, opportunistic scheduling, orthogonal random beamforming, scaling law, secrecy sum-rate, signal-to-interference ratio, Beamforming, extreme value theory, physical layer security, scaling law, secrecy rate
National Category
Signal Processing
URN: urn:nbn:se:kth:diva-117612DOI: 10.1109/LSP.2012.2234109ISI: 000313683900001ScopusID: 2-s2.0-84872279928OAI: diva2:602261

QC 20130212

Available from: 2013-01-31 Created: 2013-01-31 Last updated: 2013-02-12Bibliographically approved

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Ottersten, Björn
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