Paper Info
Title
Timing and Frequency Synchronization and Doubly Selective Channel Estimation for OFDMA Uplink
Abstract
In this brief, a novel algorithm is proposed for timing and frequency synchronization and doubly selective channel (DSC) estimation in the uplink of orthogonal frequency division multiple access systems. By using a basis expansion model (BEM) to represent a DSC, a maximum likelihood approach is proposed to jointly estimate the timing and carrier frequency offsets of different users as well as the BEM coefficients of the time-varying channels. A space-alternating generalized expectation-maximization algorithm is then employed to transform the maximization problem for all users into several simpler maximization problems for a single user. Implementation issues are investigated and, the computational complexity and mean square error of the proposed scheme are evaluated. Performance assessment of the new scheme shows a significant improvement as compared with previous methods.
Year
DOI
Venue
2020
10.1109/TCSII.2019.2901214
IEEE Transactions on Circuits and Systems II: Express Briefs
Keywords
Field
DocType
OFDM,Synchronization,Channel estimation,Uplink,Maximum likelihood estimation
Synchronization,Control theory,Communication channel,Orthogonal frequency-division multiple access,Maximum likelihood,Mean squared error,Algorithm,Maximization,Mathematics,Computational complexity theory,Telecommunications link
Journal
Volume
Issue
ISSN
67
1
1549-7747
Citations 
PageRank 
References 
0
0.34
0
Authors
3
Name
Order
Citations
PageRank
Hamed Abdzadeh-Ziabari111.70
Wei-Ping Zhu215126.21
M. N. Swamy310418.85