On the Secrecy Capacity of the Multiple-Antenna Wiretap Channel with Limited CSI Feedback

Amal Hyadi, Zouheir Rezki, Mohamed-Slim Alouini

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    2 Scopus citations

    Abstract

    We study the ergodic secrecy capacity of a block fading wiretap channel when there are multiple antennas at the transmitter, the legitimate receiver and the eavesdropper. We consider that the receivers are aware of their respective channel matrices while the transmitter is only provided by a B-bits feedback of the main channel state information. The feedback bits are sent by the legitimate receiver, at the beginning of each fading block, over an error free public link with limited capacity. Assuming an average transmit power constraint, we provide an upper and a lower bounds on the ergodic secrecy capacity. Then, we present a framework to design the optimal codebooks for feedback and transmission. In addition, we show that the proposed lower and upper bounds coincide asymptotically as the capacity of the feedback link becomes large; hence, fully characterizing the secrecy capacity in this case.
    Original languageEnglish (US)
    Title of host publicationIEEE Global Communications Conference (GLOBECOM)
    PublisherInstitute of Electrical and Electronics Engineers (IEEE)
    ISBN (Print)9781479959525
    DOIs
    StatePublished - Dec 2015

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