Outage and Diversity of Cognitive Relaying Systems under Spectrum Sharing Environments in Nakagami-m Fading

Document type: Journal Articles
Article type: Original article
Peer reviewed: Yes
Author(s): Quang Trung Duong, Daniel Benevides da Costa, Theodoros A. Tsiftsis, Caijun Zhong, Arumugam Nallanathan
Title: Outage and Diversity of Cognitive Relaying Systems under Spectrum Sharing Environments in Nakagami-m Fading
Journal: IEEE Communications Letters
Year: 2012
Volume: 12
Issue: 11
ISSN: 1089-7798
Publisher: IEEE
URI/DOI: 10.1109/LCOMM.2012.100812.121859
ISI number: 000312564200042
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: In this letter, the outage performance of dualhop cooperative spectrum sharing systems with a direct link
is investigated. A selection combining receiver is employed
at the destination in order to combine the signals received
from the decode-and-forward (DF) relay and from the source.
Assuming independent non-identically distributed Nakagami-m
fading channels, exact and asymptotic closed-form expressions
are derived for the outage probability. Our results reveal that
the diversity order of the considered system is solely determined
by the fading severity parameters of the secondary network,
being equal to min(m1, m2) + m0, where m0, m1, and m2
represent the fading severity parameters of the secondary nodes
i.e., source→destination, source→relay, and relay→destination
links, respectivel
Subject: Telecommunications\General
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