NDLI: Performance of switching-based partial relay selection scheme for amplify-and-forward cognitive relay networks

Content Provider	IET Digital Library
Author	Chu, Shao I Lien, Chih Yuan Chiu, Chien Liang
Abstract	The outage probabilities (OPs) of cognitive amplify-and-forward systems with the conventional and the switching-based partial relay selection (PRS) schemes over independent but not identically distributed Rayleigh fading channels are evaluated. The conventional PRS scheme always depends on the instantaneous channel quality of the first hop, while the switching-based PRS scheme is based on the estimated average channel state information (CSI) of the first and second hops. For the switching-based PRS scheme, the instantaneous CSI for links with the smaller average channel power in the first and the second hops for each end-to-end path is used for relay selection. Thus, the switching-based PRS scheme counts on the instantaneous CSI of either the first or second hop. The tight lower bounds and asymptotic expressions of the OP are derived. The feedback overheads of both schemes are discussed. Simulation results substantiate the theoretical analysis and also reveal that the switching-based PRS outperforms the conventional one over the cognitive relay networks in terms of OP.
Starting Page	1480
Ending Page	1492
Page Count	13
ISSN	17518628
Volume Number	10
e-ISSN	17518636
Issue Number	Issue 12, Aug (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/10/12
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2015.0843
Journal	IET Communications
Publisher Date	2016-08-11
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Amplify And Forward Communication Amplify-and-forward Cognitive Relay Network Asymptotic Expressions Channel State Information Cognitive Radio CSI Error Statistics Feedback Overheads Instantaneous Channel Quality Outage Probabilities PRS Scheme Radio Link And Equipment Relay Network Statistics Switching-based Partial Relay Selection Scheme Telecommunication
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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