A Wireless Physical Layer Security Method based on Binary Exclusive-Or Jamming Message and CSI Alignment

摘要

Unlike these conventional approaches that employ zero-forcing beam-forming (ZFB) and noise-like jamming techniques to provide wireless physical layer security, in this study, a jamming signal is proposed to be transmitted by the destination and carry a binary information message (BIM). Further, legitimate channel coefficient states (CSIs) are avoided from being listened by eavesdroppers. By smartly superposing the jamming signal onto the desire signal, an interest relay node can effectively decode the respective BIMs but still keeping a considerably degraded decoding performances at eavesdroppers. The protected BIMs allow this relay to create an exclusive-or (XOR) BIM which is always secured and does not require any further protection. It shows that the proposed method is in superiority to the conventional methods. Their outage performances are fully analyzed and compared in this paper.