In this paper, a novel joint relay and destination selection scheme is proposed to enhance the secrecy performance in cooperative single carrier frequency domain equalization (SC-FDE) systems with multiple relays and multiple destinations in the present of a group of eavesdroppers. In particular, we derive the exact and asymptotic closed-form expressions for the secrecy outage probability (SOP) and the asymptotic results demonstrate that in sufficient high SNRs region of main channels, the achievable secrecy diversity gain is L 1 QK, i.e., the product of the channel tap L 1 , the number of destination nodes Q and the number of relay nodes K. Analytical results indicate that our proposed joint selection scheme can achieve better secrecy performance compared with that in previous work.
['Pan Yuan', 'Yunpeng Cheng', 'Weiwei Yang', 'Kaihua Wang', 'Heng Wang']
Physical layer security enhancement for cooperative SC-FDE systems