Paper Info
Title
User Separation For Ofdma Uplink
Abstract
Separating user signals in the uplink (UL) of an orthogonal frequency division multiple access (OFDMA) system without access to the subcarrier assignment scheme (SAS) is a challenging task, but it can have a number of useful applications. In this paper, a semi-blind user separation algorithm is proposed, which assumes time synchronization and availability of information on the type of SAS used. The proposed algorithm estimates the carrier frequency offsets and time delays of each frequency allocation block by exploiting the cross-correlations over pilot subcarriers. A clustering method to group the blocks is employed, where each group belongs to a different user. Mathematical model of the proposed algorithm is presented, and possible user separation applications in OFDMA-based femtocells are discussed. Feasibility of the algorithm is proved through practical simulations.
Year
DOI
Venue
2009
10.1109/VETECS.2009.5073898
2009 IEEE VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-5
Keywords
Field
DocType
Carrier frequency offset estimation, cognitive radio, delay estimation, femtocell, OFDMA, user separation
Subcarrier,Femtocell,Computer science,Carrier frequency offset,Computer network,Orthogonal frequency-division multiple access,Electronic engineering,Frequency allocation,Frequency-division multiple access,Orthogonal frequency-division multiplexing,Cognitive radio
Conference
Citations 
PageRank 
References 
0
0.34
6
Authors
4
Name
Order
Citations
PageRank
Mustafa E. Sahin11069.09
Ismail Güvenç22041153.03
mooryong jeong326620.18
Hüseyin Arslan433233.33