Using simple relays to improve physical-layer security
2012 (English)In: Communications in China (ICCC), 2012 1st IEEE International Conference on, IEEE , 2012, 329-333 p.Conference paper (Refereed)
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.
Place, publisher, year, edition, pages
IEEE , 2012. 329-333 p.
Amplify-and-forward, Channel conditions, Complex functions, Cooperating relays, Decode-and-forward, Heuristic approach, Jamming signals, Mode selection, Performance Gain, Physical-layer securities, Power constraints, Wiretap channel
IdentifiersURN: urn:nbn:se:kth:diva-116790DOI: 10.1109/ICCChina.2012.6356902ScopusID: 2-s2.0-84871528743ISBN: 978-146732815-9OAI: oai:DiVA.org:kth-116790DiVA: diva2:600925
2012 1st IEEE International Conference on Communications in China, ICCC 2012, 15 August 2012 through 17 August 2012, Beijing
QC 201301282013-01-282013-01-282013-09-06Bibliographically approved