On the secrecy degress of freedom of the multi-antenna block fading wiretap channels

Mari Kobayashi, Pablo Piantanida, Sheng Yang, Shlomo Shamai

Publikation: Beitrag in Buch/Bericht/KonferenzbandKonferenzbeitragBegutachtung

1 Zitat (Scopus)

Abstract

We consider the multi-antenna wiretap channel in which the transmitter wishes to send a confidential message to its receiver while keeping it secret to the eavesdropper. It has been known that the secrecy capacity of such a channel does not increase with signal-to-noise ratio when the transmitter has no channel state information (CSI) under mild conditions. Motivated by Jafar's robust interference alignment technique, we study the so-called staggered multi-antenna block-fading wiretap channel where the legitimate receiver and the eavesdropper have different temporal correlation structures. Assuming no CSI at transmitter, we characterize lower and upper bounds on the secrecy degrees of freedom (s.d.o.f.) of the channel at hand. Our results show that a positive s.d.o.f. can be ensured whenever two receivers experience different fading variation. Remarkably, very simple linear precoding schemes provide the optimal s.d.o.f. in some cases of interest.

OriginalspracheEnglisch
Titel2010 IEEE International Symposium on Information Theory, ISIT 2010 - Proceedings
Seiten2563-2567
Seitenumfang5
DOIs
PublikationsstatusVeröffentlicht - 2010
Extern publiziertJa
Veranstaltung2010 IEEE International Symposium on Information Theory, ISIT 2010 - Austin, TX, USA/Vereinigte Staaten
Dauer: 13 Juni 201018 Juni 2010

Publikationsreihe

NameIEEE International Symposium on Information Theory - Proceedings
ISSN (Print)2157-8103

Konferenz

Konferenz2010 IEEE International Symposium on Information Theory, ISIT 2010
Land/GebietUSA/Vereinigte Staaten
OrtAustin, TX
Zeitraum13/06/1018/06/10

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