Performance Analysis of Cognitive Spectrum-Sharing Single-Carrier Systems With Relay Selection

Document type: Journal Articles
Article type: Original article
Peer reviewed: Yes
Author(s): Kyeong Jin Kim, Quang Trung Duong, Xuan Nam Tran
Title: Performance Analysis of Cognitive Spectrum-Sharing Single-Carrier Systems With Relay Selection
Journal: IEEE Transactions on Signal Processing
Year: 2012
Volume: 60
Issue: 12
Pagination: 6435 - 6449
ISSN: 1053-587X
Publisher: IEEE
URI/DOI: 10.1109/TSP.2012.2218242
ISI number: 000311805000025
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 paper, we analyze the performance of cooperative spectrum sharing single-carrier (SC) relay systems. Taking into account the peak interference power at the primary user (PU) and the maximum transmit power at the secondary user (SU) network, two separate power allocation constraints are formed. For a two-hop decode-and-forward (DF) relaying protocol and two power allocation constraints, two relay selection schemes, namely, a full-channel state information (CSI)-based best relay selection (BRS) and a partial CSI-based best relay selection (PBRS), are proposed. The distributions of the end-to-end signal-to-noise ratios (e2e-SNRs) for the four cases are derived first, and then their outage probabilities and asymptotic outage probabilities are derived in closed-form. The derived asymptotic outage probabilities are utilized to see different diversity gains. Monte Carlo simulations have verified the derived diversity gains for the four different cases. We also present upper bounds on the ergodic capacities for two particular cases.
Subject: Telecommunications\General
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