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Synchronization for Multicarrier Systems

Landström, Daniel LU (2004)
Abstract
This thesis has synchronization of Multicarrier systems, more specifically Orthogonal Frequency Division Multiplexing (OFDM) systems, as the main theme. The thesis addresses two areas, the first proposing and analyzing time and frequency estimators for OFDM systems, the second investigating more practical issues around these estimators. The practical part addresses implementation and applies the estimators in an OFDM-based mobile multiuser communication system, one of the proposals for the Universal Mobile Telecommunication System (UMTS/IMT-2000).



Estimation of time and frequency offsets is a core issue in synchronizing an OFDM system. We address this issue with a family of new time and frequency offset estimators using... (More)
This thesis has synchronization of Multicarrier systems, more specifically Orthogonal Frequency Division Multiplexing (OFDM) systems, as the main theme. The thesis addresses two areas, the first proposing and analyzing time and frequency estimators for OFDM systems, the second investigating more practical issues around these estimators. The practical part addresses implementation and applies the estimators in an OFDM-based mobile multiuser communication system, one of the proposals for the Universal Mobile Telecommunication System (UMTS/IMT-2000).



Estimation of time and frequency offsets is a core issue in synchronizing an OFDM system. We address this issue with a family of new time and frequency offset estimators using the signal redundancy provided by the cyclic prefix. The estimators are all based on the Maximum Likelihood (ML) criterion, but for different system models, e.g., with different channels, with and without pulse shaping, with and without using pilot information, and under different implementational constraints.



Furthermore, the design of an OFDM-based multiuser mobile communications system using both time and frequency division multiple access has been attempted. A standardization proposal for UMTS has been developed and submitted, suggesting, among other things, a synchronization method and parameter values describing the time and frequency grid.



The work documented here has been performed at Lund Institute of Technology, Luleå University of Technology, Telia Research AB, and the Telecommunications Research Center Vienna (ftw.). Financial support has been received from NUTEK (The Swedish National Board for Industrial and Technical Development), Vetenskapsrådet (The Swedish Research Council), Telia Research AB, and VINNOVA through the Eureka/Medea+ A106 INCA and A110 MIDAS programs. (Less)
Please use this url to cite or link to this publication:
author
opponent
  • Dr Zazo, Santiago, Universidad Politécnica de Madrid, Spain
organization
publishing date
type
Thesis
publication status
published
subject
keywords
Signal processing, Signalbehandling, Frequency estimation, Time estimation, Maximum-Likelihood, Synchronization, OFDM, DMT
pages
197 pages
publisher
Department of Information Technology, Lund Univeristy
defense location
E-building, room E:1406, Lund Institute of Technology
defense date
2004-04-14 10:15
ISBN
91-7167-029-7
language
English
LU publication?
yes
id
4d7a9f9e-3c0d-4931-b8d1-0f948af78a74 (old id 466820)
date added to LUP
2007-09-10 12:39:40
date last changed
2016-09-19 08:45:15
@misc{4d7a9f9e-3c0d-4931-b8d1-0f948af78a74,
  abstract     = {This thesis has synchronization of Multicarrier systems, more specifically Orthogonal Frequency Division Multiplexing (OFDM) systems, as the main theme. The thesis addresses two areas, the first proposing and analyzing time and frequency estimators for OFDM systems, the second investigating more practical issues around these estimators. The practical part addresses implementation and applies the estimators in an OFDM-based mobile multiuser communication system, one of the proposals for the Universal Mobile Telecommunication System (UMTS/IMT-2000).<br/><br>
<br/><br>
Estimation of time and frequency offsets is a core issue in synchronizing an OFDM system. We address this issue with a family of new time and frequency offset estimators using the signal redundancy provided by the cyclic prefix. The estimators are all based on the Maximum Likelihood (ML) criterion, but for different system models, e.g., with different channels, with and without pulse shaping, with and without using pilot information, and under different implementational constraints.<br/><br>
<br/><br>
Furthermore, the design of an OFDM-based multiuser mobile communications system using both time and frequency division multiple access has been attempted. A standardization proposal for UMTS has been developed and submitted, suggesting, among other things, a synchronization method and parameter values describing the time and frequency grid.<br/><br>
<br/><br>
The work documented here has been performed at Lund Institute of Technology, Luleå University of Technology, Telia Research AB, and the Telecommunications Research Center Vienna (ftw.). Financial support has been received from NUTEK (The Swedish National Board for Industrial and Technical Development), Vetenskapsrådet (The Swedish Research Council), Telia Research AB, and VINNOVA through the Eureka/Medea+ A106 INCA and A110 MIDAS programs.},
  author       = {Landström, Daniel},
  isbn         = {91-7167-029-7},
  keyword      = {Signal processing,Signalbehandling,Frequency estimation,Time estimation,Maximum-Likelihood,Synchronization,OFDM,DMT},
  language     = {eng},
  pages        = {197},
  publisher    = {ARRAY(0xa82b760)},
  title        = {Synchronization for Multicarrier Systems},
  year         = {2004},
}