2018/07/30 by Saeed Vahidian, Vahidian, Saeed, Sajad Hatamnia +3
Computer Science · Engineering · #Advanced Wireless Communication Technologies #Cooperative Communication and Network Coding #Cryptography and Security (cs.CR) #FOS: Computer and information sciences #Networking and Internet Architecture (cs.NI) #Wireless Communication Security Techniques
paper · pdf · doi:10.48550/arxiv.1807.11621
openalex publication_date 2018/07/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Physical layer security offers an efficient means to decrease the risk of\nconfidential information leakage through wiretap links. In this paper, we\naddress the physical-layer security in a cooperative wireless subnetwork that\nincludes a source-destination pair and multiple relays, exchanging information\nin the presence of a malevolent eavesdropper. Specifically, the eavesdropper is\nactive in the network and transmits artificial noise (AN) with a\nmultiple-antenna transmitter to confound both the relays and the destination.\nWe first analyse the secrecy capacity of the direct source-to-destination\ntransmission in terms of intercept probability (IP) and secrecy outage\nprobability (SOP). A decode-and-forward incremental relaying (IR) protocol is\nthen introduced to improve reliability and security of communications in the\npresence of the active eavesdropper. Within this context, and depending on the\navailability of channel state information, three different schemes (one optimal\nand two sub-optimal) are proposed to select a trusted relay to improve the\nachievable secrecy rate. For each one of these schemes, and for both selection\nand maximum ratio combining at the destination and eavesdropper, we derive new\nand exact closed-form expressions for the IP and SOP. Our analysis and\nsimulation results demonstrate the superior performance of the proposed\nIR-based selection schemes for secure communication. They also confirm the\nexistence of a floor phenomenon for the SOP in the absence of AN.\n