Using simple relays to improve physical-layer security

Gan Zheng, Jiangyuan Li, Kai Kit Wong, Athina P. Petropulu, Björn Ottersten

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

15 Scopus citations

Abstract

This paper studies different uses of two cooperating relays to improve the secrecy rate of a wiretap channel. These two relays are assumed to perform only simple functions: either amplify-and-forward (AF) or jamming. Complex functions such as decode-and-forward (DF) are not considered. We study three modes of cooperation: i) cooperative jamming (CJ), ii) AF-aided beamforming and iii) mixed AF-aided beamforming and CJ, all with individual relay power constraints. While i) is known in the literature, our efforts are spent on ii) and iii). In particular, for iii), we assume that the jamming signals in two communication stages are correlated, giving rise to improved performances. We also propose a heuristic approach for selecting the appropriate cooperating mode. Simulation results illustrate the performance gain of each scheme under different channel conditions and the effectiveness of the proposed mode selection method.

Original languageEnglish (US)
Title of host publication2012 1st IEEE International Conference on Communications in China, ICCC 2012
Pages329-333
Number of pages5
DOIs
StatePublished - 2012
Event2012 1st IEEE International Conference on Communications in China, ICCC 2012 - Beijing, China
Duration: Aug 15 2012Aug 17 2012

Publication series

Name2012 1st IEEE International Conference on Communications in China, ICCC 2012

Other

Other2012 1st IEEE International Conference on Communications in China, ICCC 2012
Country/TerritoryChina
CityBeijing
Period8/15/128/17/12

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Communication

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