NDLI: Secrecy performance of threshold-based decode-and-forward cooperative cognitive radio network

Content Provider	IET Digital Library
Author	Chopra, Khyati Bose, Ranjan Joshi, Anupam
Abstract	This study evaluates the intercept and outage probability of a decode-and-forward (DF) underlay cognitive radio network. The secondary users are subject to interference limitations from the primary network, with an eavesdropper tapping the second hop of cognitive network, when all the links undergo Rayleigh fading. For this threshold-based system, without assuming that the DF relays can always decode the message correctly, here the authors consider that only a set of relays whose SNR satisfies a predetermined threshold can decode the message successfully. The authors have obtained asymptotic analysis for both cases, when average SNRs of secondary source-relay and relay-destination links are balanced or unbalanced. The authors have shown that the desired secrecy rate, predetermined threshold, eavesdropper channel quality and interference power limitations significantly affects the secrecy performance of the cognitive radio system. They have investigated the outage and intercept probability of relay selection scheme, when either full instantaneous channel state information or statistical channel state information of all the links is available. They have shown that the optimal relay selection improves the performance of the multi-relay cognitive system, when the number of relays is increased.
Starting Page	1396
Ending Page	1406
Page Count	11
ISSN	17518628
Volume Number	11
e-ISSN	17518636
Issue Number	Issue 9, Jun (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/11/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2016.0917
Journal	IET Communications
Publisher Date	2017-02-28
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Asymptotic Analysis Cognitive Radio Decode And Forward Communication Decode-and-forward Cooperative Cognitive Radio Network DF Underlay Cognitive Radio Network Eavesdropper Channel Quality Eavesdropper Tapping Electromagnetic Compatibility Fading Channel Interference Interference Limitations Interference Power Limitations Multirelay Cognitive System Outage Probability Primary Network Probability Radio Frequency Interference Radio Link And Equipment Rayleigh Channel Rayleigh Fading Relay Network Relay Selection Scheme Relay-destination Link Secondary Source-relay Secrecy Performance Statistical Channel State Information Statistics Telecommunication
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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