NDLI: Cooperative spectrum sharing systems with relay selection in the presence of multiple primary receivers

Content Provider	IET Digital Library
Author	Guimarães, Francisco Rafael Vasconcelos Costa, Daniel Benevides Da Benjillali, Mustapha Tsiftsis, Theodoros A. Karagiannidis, George K.
Abstract	In this study, the outage performance of a multi-relay cooperative network operating in a spectrum sharing environment is analysed. Focusing on the secondary communication process, a relay selection procedure is performed prior to the communication process, where the selected relay is the one maximising the instantaneous end-to-end signal-to-noise ratio (SNR) and, at the same time, satisfying the power restrictions imposed by the primary receivers. The secondary destination employs a selection combining strategy, selecting the best path (direct link or relaying link) with the highest instantaneous SNR. Two kinds of relaying protocols are considered: decode-and-forward and amplify-and-forward. For the former, an exact closed-form expression for the outage probability (OP) is derived, whereas for the latter an accurate approximation for the OP is obtained. Then, an asymptotic analysis is carried out and reveals that the system diversity order is N + 1 for both relaying protocols, with N denoting the number of relays. Monte Carlo simulations assess the accuracy of the authors’ results.
Starting Page	546
Ending Page	553
Page Count	8
ISSN	17518628
Volume Number	8
e-ISSN	17518636
Issue Number	Issue 4, Mar (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/8/4
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2013.0575
Journal	IET Communications
Publisher Date	2014-01-29
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Amplify And Forward Communication Amplify-and-forward Asymptotic Analysis Cooperative Communication Cooperative Spectrum Sharing System Decode And Forward Communication Decode-and-forward Direct Link Monte Carlo Method Monte Carlo Simulation Method Multiple Primary Receiver Multirelay Cooperative Network Outage Performance Outage Probability Protocol Radio Link And Equipment Radio Receiver Radio Spectrum Management Relay Network Relay Selection Relaying Link Relaying Protocol Secondary Communication Process Selection Combining Strategy Signal to Noise Ratio SNR Spectrum Sharing Environment System Diversity Order Telecommunication
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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