Performance Analysis of Cognitive Relay Networks Under Power Constraint of Multiple Primary Users

Document type: Conference Papers
Peer reviewed: Yes
Author(s): Hung Tran, Quang Trung Duong, Hans-Jürgen Zepernick
Title: Performance Analysis of Cognitive Relay Networks Under Power Constraint of Multiple Primary Users
Conference name: IEEE GLOBECOM 2011
Year: 2011
ISBN: 978-1-4244-9268-8
Publisher: IEEE
City: Houston
ISI number: 000300509000085
Other identifiers: Link to the final program of the conference: http://www.ieee-globecom.org/techprogram.html
Organization: Blekinge Institute of Technology
Department: School of Computing (Sektionen för datavetenskap och kommunikation)
School of Computing S-371 79 Karlskrona
+46 455 38 50 00
http://www.bth.se/com
Authors e-mail: quang.trung.duong@bth.se
Language: English
Abstract: Cognitive relaying is a promising technique to improve spectrum utilization in mobile networks. In this paper, we consider a scenario in which a secondary transmitter communicates with a secondary receiver by the help of a secondary relay. The secondary user should adjust its transmission power in order to not cause any harmful interference to the multiple primary users operating in the licensed spectrum. In this context, we investigate the end-to-end performance of cognitive relay networks in terms of outage probability and ergodic capacity over Nakagami-m fading channels. A closed-form expression for outage probability and an approximation for ergodic capacity are derived. Furthermore, the presented numerical examples illustrate the impact of the number of primary users on the performance of cognitive relay networks.
Subject: Telecommunications\General
Keywords: cognitive relay networks, spectrum sharing
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