Physical layer security of relay selection NOMA wireless systems
Aiming at poor performance of physical layer security(PLS)of decode-and-forward cooperative non-orthogonal multiple access(NOMA)systems and its performance deterioration in the presence of multi-eavesdropper,the PLS model of multi-relay selection NOMA wireless systems using modify-and-forward(MF)protocol was pro-posed.The approximate expressions of secrecy outage probability(SOP)and asymptotic SOP of multi-relay selection MF-NOMA wireless systems with non-colluding or colluding eavesdropping scenarios were derived by using Gauss-Chebyshev Quadrature theorem.The simulation results verify the accuracy of PLS performance analysis of the above MF-NOMA wireless systems.The results also indicate that the PLS performance of multi-relay selection MF-NOMA wireless systems will be improved when the number of relays increases or the number of eavesdroppers decreases,and that colluding eavesdropping is more detrimental to secure transmission of multi-relay MF-NOMA wireless sys-tems than non-colluding eavesdropping.
non-orthogonal multiple accessmodify-and-forwardrelay selectionphysical layer securitysecrecy out-age probability
万方数据
维普
