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On SDoF of Multi-Receiver Wiretap Channel With Alternating CSIT

Abstract : We study the problem of secure transmission over a Gaussian multi-input single-output (MISO) two receiver channel with an external eavesdropper, under the assumption that the state of the channel which is available to each receiver is conveyed either perfectly (P) or with delay (D) to the transmitter. Denoting by S1, S2, and S3 the channel state information at the transmitter (CSIT) of user 1, user 2, and eavesdropper, respectively, the overall CSIT can then alternate between eight possible states, i.e., (S1, S2, S3) ∈ {P,D}3. We denote by λS1S2S3 the fraction of time during which the state S1S2S3 occurs. Under these assumptions, we consider the multi-receiver setup and characterize the SDoF region of fixed hybrid states PPD, PDP, and DDP. We then focus our attention on the symmetric case in which λPDD = λDPD. For this case, we establish bounds on the SDoF region. The analysis reveals that alternating CSIT allows synergistic gains in terms of SDoF; and shows that, by opposition to encoding separately over different states, joint encoding across the states enables strictly better secure rates.
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https://hal.archives-ouvertes.fr/hal-01807296
Contributor : Abdellatif Zaidi <>
Submitted on : Monday, June 4, 2018 - 3:47:57 PM
Last modification on : Thursday, May 14, 2020 - 10:56:02 AM

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Zohaib Hassan Awan, Abdellatif Zaidi, Aydin Sezgin. On SDoF of Multi-Receiver Wiretap Channel With Alternating CSIT. IEEE Transactions on Information Forensics and Security, Institute of Electrical and Electronics Engineers, 2016, 11 (08), pp.1780-1795 ⟨10.1109/ISIT.2016.7541844⟩. ⟨hal-01807296⟩

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