Secrecy rate optimization under cooperation with perfect channel state information

Jiangyuan Li, Athina P. Petropulu, Steven Weber

Research output: Chapter in Book/Report/Conference proceedingConference contribution

15 Scopus citations

Abstract

We investigate the problem of optimizing the secrecy rate of a link between a single source and a single destination in the presence of multiple relays and multiple eavesdroppers. Multiple relays assist the source by either retransmitting a weighted version of the source signal in a decode-and-forward (DF) fashion, or by performing cooperative jamming (CJ) i.e., transmitting weighted noise in order to confound the eavesdropper. In each protocol, the relay weights are designed to maximize the secrecy rate subject to a total power constraint. For the case of a single eavesdropper we obtain expressions for the optimal weights under both protocols in closed form, or propose the algorithms to research for the solution. For the DF protocol with multiple eavesdroppers we propose an algorithm to search for the solution. Numerical results illustrate that cooperation can significantly improve the system performance as compared to direct transmission.

Original languageEnglish (US)
Title of host publicationConference Record - 43rd Asilomar Conference on Signals, Systems and Computers
Pages824-828
Number of pages5
DOIs
StatePublished - 2009
Externally publishedYes
Event43rd Asilomar Conference on Signals, Systems and Computers - Pacific Grove, CA, United States
Duration: Nov 1 2009Nov 4 2009

Publication series

NameConference Record - Asilomar Conference on Signals, Systems and Computers
ISSN (Print)1058-6393

Other

Other43rd Asilomar Conference on Signals, Systems and Computers
CountryUnited States
CityPacific Grove, CA
Period11/1/0911/4/09

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Computer Networks and Communications

Fingerprint Dive into the research topics of 'Secrecy rate optimization under cooperation with perfect channel state information'. Together they form a unique fingerprint.

Cite this