On MISO Wiretap Channel With Delayed CSIT and Alternating Topology

Conference: SCC 2015 - 10th International ITG Conference on Systems, Communications and Coding
02/02/2015 - 02/05/2015 at Hamburg, Germany

Proceedings: ITG-Fb 254: 10th International ITG Conference on Systems, Communications and Coding (SCC 2015)

Pages: 6Language: englishTyp: PDF

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Authors:
Awan, Zohaib Hassan; Sezgin, Aydin (Chair of Communication Systems, Ruhr-Universität Bochum, 44780 Bochum, Germany)

Abstract:
We study the problem of secure transmission over a Gaussian (2, 1, 1)–multi-input single-output (MISO) wiretap channel under the assumption that links connecting the legitimate receiver and the eavesdropper, may have unequal strengths statistically and delayed channel state information is available at the transmitter (CSIT) from both receivers, respectively. We focus on a two state topological setting of strong v.s. weak links. For this model, we establish bounds on generalized secure degrees of freedom (SDoF). For some special cases, the upper and lower bounds coincide and SDoF is characterized. The encoding scheme sheds light on the usage of both resources, i.e., topology and delayed CSIT, in a non-trivial manner.