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Secret-key agreement over a non-coherent block-fading MIMO wiretap channel
KTH, Skolan för elektro- och systemteknik (EES), Kommunikationsteori. KTH, Skolan för elektro- och systemteknik (EES), Centra, ACCESS Linnaeus Centre.
KTH, Skolan för elektro- och systemteknik (EES), Kommunikationsteori. KTH, Skolan för elektro- och systemteknik (EES), Centra, ACCESS Linnaeus Centre.ORCID-id: 0000-0002-7926-5081
2012 (engelsk)Inngår i: Information Theory Workshop (ITW), 2012 IEEE, IEEE , 2012, s. 153-157Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

We study secret-key agreement over a non-coherent block-fading multiple input multiple output (MIMO) wiretap channel. We give an achievable scheme based on training and source emulation and analyze the rate in the high SNR regime. Based on this analysis we find the optimal number of antennas to use for training. Our main result is that if the sum of the number of antennas at Alice and Bob is larger than the coherence time of the channel, the achievable rate does not depend on the number of antennas at Eve. In this case source emulation is not needed, and using only training is optimal. We also consider the case when there is no public channel available. In this case we show that secret-key agreement is still possible by using the wireless channel for discussion, giving the same number of secure degrees of freedom as in the case with a public channel.

sted, utgiver, år, opplag, sider
IEEE , 2012. s. 153-157
Emneord [en]
Common Randomness, Communication, Information
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-117768DOI: 10.1109/ITW.2012.6404646ISI: 000313526400033Scopus ID: 2-s2.0-84873135872ISBN: 978-146730223-4 (tryckt)OAI: oai:DiVA.org:kth-117768DiVA, id: diva2:602973
Konferanse
IEEE Information Theory Workshop, ITW 2012; Lausanne; 3 September 2012 through 7 September 2012
Merknad

QC 20130220

Tilgjengelig fra: 2013-02-04 Laget: 2013-02-04 Sist oppdatert: 2013-03-05bibliografisk kontrollert

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Totalt: 541 treff
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