Degrees of freedom of the single antenna gaussian wiretap channel with a helper irrespective of the number of antennas at the eavesdropper

Mohamed Nafea, Aylin Yener

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

    9 Scopus citations

    Abstract

    A Gaussian wiretap channel with a helper, i.e., a cooperative jammer, is considered and its secure degrees of freedom (s.d.o.f.) is computed. Previous work showed that the s.d.o.f. is upper bounded by 1 over 2 in this model when all parties are equipped with one antenna each. In this paper, the more challenging scenario where the eavesdropper has multiple antennas is tackled. Relying on structured signaling and cooperative jamming, specifically, by real interference alignment, it is shown that s.d.o.f. of 1 over 2 is achievable irrespective of the number of antennas the eavesdropper may have as long as the cooperative jammer has the same number of antennas as the eavesdropper. The design insight revealed is that the price to pay for the increase in the number of antennas at the eavesdropper is an equivalent increase in the number of antennas at the cooperative jammer in order to maintain the same s.d.o.f.

    Original languageEnglish (US)
    Title of host publication2013 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2013 - Proceedings
    Pages273-276
    Number of pages4
    DOIs
    StatePublished - Dec 1 2013
    Event2013 1st IEEE Global Conference on Signal and Information Processing, GlobalSIP 2013 - Austin, TX, United States
    Duration: Dec 3 2013Dec 5 2013

    Publication series

    Name2013 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2013 - Proceedings

    Other

    Other2013 1st IEEE Global Conference on Signal and Information Processing, GlobalSIP 2013
    CountryUnited States
    CityAustin, TX
    Period12/3/1312/5/13

    All Science Journal Classification (ASJC) codes

    • Information Systems
    • Signal Processing

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