NDLI: Physical layer security in cooperative amplify-and-forward relay networks over mixed Nakagami-m and double Nakagami-m fading channels: performance evaluation and optimisation

Content Provider	IET Digital Library
Author	Pandey, Anshul Yadav, Suneel
Abstract	The authors investigate the secrecy performance of a cooperative relaying network, wherein a fixed source communicates with a fixed destination via an amplify-and-forward mobile relay in the presence of a passive mobile eavesdropper. They assume that the source-to-relay channel and relay-to-destination channel experience Nakagami-m fading, whereas relay-to-eavesdropper link follows double Nakagami-m fading. Under such a mixed fading environment, they derive the novel tight closed-form expressions for the secrecy outage probability (SOP), probability of non-zero secrecy capacity, and intercept probability of the considered system. They also deduce the asymptotic secrecy outage and intercept probability expressions in the high signal-to-noise ratio regime to highlight the impact of fading parameters and channel conditions on the secrecy diversity order. It is shown that the system can achieve secrecy diversity order of min( m SR , m RD ) in terms of SOP, and m RD in terms of intercept probability, where m SR and m RD represent the fading severity parameters between source and relay and between relay and destination, respectively. They also formulate and investigate analytically two optimisation problems, namely, optimal relay location with fixed power allocation and optimal power allocation with fixed relay location, to minimise the system SOP. They verify analytical findings via numerical and simulation results.
Starting Page	95
Ending Page	104
Page Count	10
ISSN	17518628
Volume Number	14
e-ISSN	17518636
Issue Number	Issue 1, Jan (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/14/1
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2019.0584
Journal	IET Communications
Publisher Date	2019-10-11
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Amplify And Forward Communication Amplify-and-forward Mobile Relay Asymptotic Secrecy Outage Channel Condition Closed-form Expression Cooperative Amplify-and-forward Relay Network Cooperative Communication Double Nakagami-m Fading Channel Fading Severity Parameter Fixed Destination Fixed Power Allocation Fixed Relay Location Fixed Source Communicates High Signal-to-noise Ratio Regime Intercept Probability Mixed Fading Environment Mixed Nakagami-m Fading Channel Mobile Computing Mobile Radio System Nakagami Channel Nonzero Secrecy Capacity Optimal Relay Location Optimisation Optimisation Technique Passive Mobile Eavesdropper Performance Evaluation Physical Layer Security Probability Relay Network Relay-to-destination Channel Relay-to-eavesdropper Link Relaying Network Secrecy Diversity Order Secrecy Outage Probability Secrecy Performance Source-to-relay Channel Statistics System SOP Telecommunication Telecommunication Security
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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