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Sensitivity of the secrecy capacity of a wiretap channel to the channel gains with imperfect channel information

Sedighizad, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1109/IWCIT.2017.7947669
  3. Abstract:
  4. In this paper, the impact of a small variations in the channel gains on the secrecy rate of the wiretap channel is studied, in which it is assumed that the imperfect channel knowledge is available at the transmitter. First, we consider general additive noise model for both legitimate and eavesdropper channels in the wiretap channel, and compute the variation of the secrecy rate resulting from the small variations in the channel gains. Then, we focus on the Gaussian wiretap channel, as a special case and calculate the sensitivity of the secrecy capacity to the channel gains with imperfect channel knowledge. Interestingly, it is shown that in some situations the effect of the channel variation on the secrecy capacity can be canceled out. © 2017 IEEE
  5. Keywords:
  6. Imperfect channel information ; Mutual information variation ; Wiretap channel ; Additive noise ; Codes (symbols) ; Information theory ; Channel gains ; Channel variations ; Imperfect channel informations ; Imperfect channel knowledge ; Mutual informations ; Secrecy capacity ; Small variations ; Wire-tap channels ; Communication channels (information theory)
  7. Source: IWCIT 2017 - Iran Workshop on Communication and Information Theory, 3 May 2017 through 4 May 2017 ; 2017 ; 9781509047833 (ISBN)
  8. URL: https://ieeexplore.ieee.org/document/7947669