NDLI: Performance analysis of secure AF relay networks using cooperative jamming under outdated CSI

Content Provider	IET Digital Library
Author	Mabrouk, Asma Tourki, Kamel Hasna, Mazen O. Hamdi, Noureddine
Abstract	This paper studies cooperative transmission for securing a two-hop network where the eavesdropper can wiretap the relay channels. With outdated channel state information (CSI), we propose an opportunistic relaying with destination-based jamming scheme, where one relay is chosen to forward the confidential signal and the destination sends jamming signal to confuse the eavesdropper. To reveal the capability of the proposed scheme in improving the system secrecy, we investigate the two common performance metrics under different assumptions on the eavesdropper CSI. First, lower bound on the ergodic secrecy capacity (ESC) is derived assuming perfect knowledge of the eavesdropper channel gains. We, then, extend our results to the scenario where only the legitimate channel gain is known. Here, lower bound on the secrecy outage probability (SOP) is obtained. To further improve the utility of the destination, under total power constraint, a power allocation between data signal and jamming noise is considered. Both the analysis and simulation results indicate that the system performance is significantly improved in terms of both ESC and SOP when the jamming power at the destination is adjusted according to the selected relay position. We verify that, with outdated CSI, the secrecy performance of opportunistic relaying is severely degraded.
Starting Page	2199
Ending Page	2205
Page Count	7
ISSN	17518628
Volume Number	11
e-ISSN	17518636
Issue Number	Issue 14, Sep (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/11/14
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2017.0412
Journal	IET Communications
Publisher Date	2017-07-24
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Amplify And Forward Communication Cooperative Communication Cooperative Jamming Cooperative Transmission Destination-based Jamming Scheme Electromagnetic Compatibility Ergodic Secrecy Capacity ESC Interference Jamming Opportunistic Relaying Outdated Channel State Information Outdated CSI Power Allocation Probability Radio Link And Equipment Relay Network Secrecy Outage Probability Secure AF Relay Network SOP Statistics Telecommunication
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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