Paper Info
Title
ICI-minimizing blind uplink time synchronization for OFDMA-based cognitive radio systems
Abstract
Cognitive radio is an enabling technology for efficient utilization of radio spectrum. In this paper, an orthogonal frequency division multiple access (OFDMA) based cognitive (opportunistic) network is considered, which co-exists with a macrocell network through utilizing its unused subcarriers. We particularly consider the uplink opportunity detection problem by the opportunistic network, where accurate synchronization to the macrocell network is crucial for minimizing the interference received from the macrocell users. After demonstrating the impact of synchronization on the inter-carrier-interference (ICI) observed at the opportunistic network, an improved blind first-user synchronization technique is proposed, and its statistics are analyzed. Through computer simulations it is shown that the proposed technique yields less interference and better opportunities for the opportunistic network.
Year
DOI
Venue
2009
10.1109/GLOCOM.2009.5425546
GLOBECOM
Keywords
Field
DocType
proposed technique yield,macrocell network,improved blind first-user synchronization,opportunistic network,cognitive radio,macrocell user,blind uplink time synchronization,better opportunity,radio spectrum,ofdma-based cognitive radio system,accurate synchronization,computer simulation,statistical analysis,correlation,ofdm,ofdm modulation,signal to noise ratio,synchronization,spectrum,interference,synchronisation
Synchronization,Femtocell,Computer science,Orthogonal frequency-division multiple access,Computer network,Real-time computing,Frequency-division multiple access,Orthogonal frequency-division multiplexing,Macrocell,Telecommunications link,Cognitive radio
Conference
ISSN
Citations 
PageRank 
1930-529X
4
0.50
References 
Authors
12
5
Name
Order
Citations
PageRank
Ismail Güvenç12041153.03
Sibel Tombaz212310.77
Mustafa E. Sahin31069.09
Hüseyin Arslan433233.33
Hakan Ali Cirpan550.85