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Secrecy capacity of a class of orthogonal relay eavesdropper channels

Publication ,  Journal Article
Aggarwal, V; Sankar, L; Calderbank, AR; Poor, HV
Published in: Eurasip Journal on Wireless Communications and Networking
September 2, 2009

The secrecy capacity of relay channels with orthogonal components is studied in the presence of an additional passive eavesdropper node. The relay and destination receive signals from the source on two orthogonal channels such that the destination also receives transmissions from the relay on its channel. The eavesdropper can overhear either one or both of the orthogonal channels. Inner and outer bounds on the secrecy capacity are developed for both the discrete memoryless and the Gaussian channel models. For the discrete memoryless case, the secrecy capacity is shown to be achieved by a partial decode-and-forward (PDF) scheme when the eavesdropper can overhear only one of the two orthogonal channels. Two new outer bounds are presented for the Gaussian model using recent capacity results for a Gaussian multiantenna point-to-point channel with a multiantenna eavesdropper. The outer bounds are shown to be tight for two subclasses of channels. The first subclass is one in which the source and relay are clustered, and the eavesdropper receives signals only on the channel from the source and the relay to the destination, for which the PDF strategy is optimal. The second is a subclass in which the source does not transmit to the relay, for which a noise-forwarding strategy is optimal. Copyright © 2009 Vaneet Aggarwal et al.

Duke Scholars

Published In

Eurasip Journal on Wireless Communications and Networking

DOI

EISSN

1687-1499

ISSN

1687-1472

Publication Date

September 2, 2009

Volume

2009

Related Subject Headings

  • Networking & Telecommunications
  • 4606 Distributed computing and systems software
  • 4006 Communications engineering
  • 1005 Communications Technologies
  • 0906 Electrical and Electronic Engineering
  • 0806 Information Systems
 

Citation

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Aggarwal, V., Sankar, L., Calderbank, A. R., & Poor, H. V. (2009). Secrecy capacity of a class of orthogonal relay eavesdropper channels. Eurasip Journal on Wireless Communications and Networking, 2009. https://doi.org/10.1155/2009/494696
Aggarwal, V., L. Sankar, A. R. Calderbank, and H. V. Poor. “Secrecy capacity of a class of orthogonal relay eavesdropper channels.” Eurasip Journal on Wireless Communications and Networking 2009 (September 2, 2009). https://doi.org/10.1155/2009/494696.
Aggarwal V, Sankar L, Calderbank AR, Poor HV. Secrecy capacity of a class of orthogonal relay eavesdropper channels. Eurasip Journal on Wireless Communications and Networking. 2009 Sep 2;2009.
Aggarwal, V., et al. “Secrecy capacity of a class of orthogonal relay eavesdropper channels.” Eurasip Journal on Wireless Communications and Networking, vol. 2009, Sept. 2009. Scopus, doi:10.1155/2009/494696.
Aggarwal V, Sankar L, Calderbank AR, Poor HV. Secrecy capacity of a class of orthogonal relay eavesdropper channels. Eurasip Journal on Wireless Communications and Networking. 2009 Sep 2;2009.
Journal cover image

Published In

Eurasip Journal on Wireless Communications and Networking

DOI

EISSN

1687-1499

ISSN

1687-1472

Publication Date

September 2, 2009

Volume

2009

Related Subject Headings

  • Networking & Telecommunications
  • 4606 Distributed computing and systems software
  • 4006 Communications engineering
  • 1005 Communications Technologies
  • 0906 Electrical and Electronic Engineering
  • 0806 Information Systems