Title :
Full-Duplex Relay for Enhancing Physical Layer Security in Multi-Hop Relaying Systems
Author_Institution :
Dept. of Electron. Eng., Gachon Univ., Seongnam, South Korea
Abstract :
In this letter, we consider secure communications in multi-hop relaying systems, where full-duplex relays (FDRs) operate to enhance wireless physical layer security. Each FDR is designed to transmit jamming signals to the eavesdropper when it receives information signals from the previous adjacent node. The achievable secrecy rate with the proposed decode-and-forward (DF) FDRs are analyzed with a total transmit power constraint. The transmit power allocation problem is solved by using the geometric programming (GP) method. Numerical results present that the proposed FDRs significantly enhance the secrecy rate compared to the conventional half-duplex relays (HDRs).
Keywords :
decode and forward communication; geometric programming; jamming; relay networks (telecommunication); telecommunication security; DF full-duplex relay system; GP method; decode and forward FDR system; geometric programming method; jamming signal transmission; multihop relaying system; power allocation problem; wireless physical layer security enhancement; Communication system security; Jamming; Physical layer; Relays; Resource management; Security; Wireless communication; Physical layer security; full-duplex relay; fullduplex relay; jamming; relay networks; secrecy rate;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2015.2401551
