Physical layer security in half-duplex multi-hop relaying system

Abstract

In this paper we represent a half-duplex relay network to investigate the secrecy performance of multi-hop relaying system. In this paper half duplex relay(HDR) is used to enhance the physical layer security (PLS) for secure transmission in multi-hop relaying system, in which each intermediate node help to forward the message as a relay. In this paper, we find out the secrecy performance of half-duplex jamming (HDJ) network and this network is design in such a way that each HDR transmit jamming signal to the intruder when it receive the required signal from the previous adjacent node. In this paper we also investigated the achievable secrecy rate in HDR and HDJ network under the total transmit power constraint with the decode-and-forward scheme. Numerical results show that the HDJ network has better secrecy rate than HDR network.