Optimised secure transmission through untrusted AF relays using link adaptation. Issue 5 (3rd May 2016)

• Record Type: Journal Article
• Authors: Taki, Mehrdad; Sadeghi, Mohammad
• Is Part Of: International journal of electronics. Volume 103:Issue 5(2016)
• Page Start: 831
• Page End: 840
• Publication Date: 2016-05-03
• Subjects: Amplify and forward relay -- link adaptation -- adaptive modulation and coding -- physical layer security; Electronics -- Periodicals; Electronic control -- Periodicals; 621.381
• DOI: 10.1080/00207217.2015.1072847
• Languages: English
• ISSNs: 0020-7217

Abstract

ABSTRACT: A new transmission scheme is presented for a two-hop relay network including two AF relays, considering physical layer security where relays are not able to detect signal with an acceptable bit error rate (BER) but the combined received signal is detected with an acceptable BER at the final receiver. It is assumed that there is no direct path between the transmitter and the receiver (relay network without diversity). Adaptive modulation and coding is utilised at the transmitter and transmission powers of the transmitter and of the relays are continuously adapted provisioning individual average power constraint for each node. Numerical evaluations show that an acceptable performance degradation is seen by the proposed secure relaying scheme compared to the optimum relay selection scheme without security constraint.