Towards a constant-gap sum-capacity result for the Gaussian wiretap channel with a helper

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Contributors

  • Rick Fritschek - , Free University of Berlin (Author)
  • Gerhard Wunder - , Free University of Berlin (Author)

Abstract

Recent investigations have shown that the sum secure degrees of freedom of the Gaussian wiretap channel with a helper is 1/2. The achievable scheme for this result is based on the real interference alignment approach. While providing a good way to show degrees of freedom results, this technique has the disadvantage of relying on the Khintchine-Groshev theorem and is therefore limited to almost all channel gains. This means that there are infinitely many channel gains, where the scheme fails. Furthermore, the real interference alignment approach cannot be used to yield stronger constant-gap results. We approach this topic from a signal-scale alignment perspective and use the linear deterministic model as a first approximation. Here we can show a constant-gap sum capacity for certain channel gain parameters. We transfer these results to the Gaussian model and discuss the results.

Details

Original languageEnglish
Title of host publication2016 IEEE International Symposium on Information Theory (ISIT)
PublisherIEEE
Pages2978-2982
Number of pages5
ISBN (print)978-1-5090-1807-9
Publication statusPublished - 15 Jul 2016
Peer-reviewedYes
Externally publishedYes

Conference

Title2016 IEEE International Symposium on Information Theory (ISIT)
Duration10 - 15 July 2016
LocationBarcelona, Spain

External IDs

Scopus 84985945418

Keywords

Keywords

  • Jamming, AWGN, TV