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Analysis of Doppler spread perturbations in OFDM(A) systems

Robertson, Patrick and Kaiser, Stefan (2000) Analysis of Doppler spread perturbations in OFDM(A) systems. European Transactions on Telecommunications, 11 (6). ETT.

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Abstract

We analyze the e�ects of Doppler spread in mobile channels on Orthogonal Frequency Division Multiplex �OFDM� systems� This is important� since channel variations during one OFDM symbol cause Inter Sub� Carrier Interference �ICI� in OFDM systems� which degrades the performance� since ICI can be seen as additional near�Gaussian noise� The analysis is presented and closed�form results are given for numerous important practical Doppler spread encountered in mobile channels and applications such as mobile reception of DVB�T� We also show that for the case of asymmetrical Doppler spreads� the frequency correction of the receiver can be adjusted so as to minimize the ICI� To extend our work to OFDM�A� mobile radio systems where many users� contributions to the ICI overlap� we have introduced the concept of an equivalent single� user which causes the total ICI� in order to use the same analytical framework� and compared the uplink and downlink cases� Simulation results con�rm our analysis and show the importance of the analytical tool to perform realistic system analysis without having to resort to time consuming time�domain simulations�

Item URL in elib:https://elib.dlr.de/22625/
Document Type:Article
Title:Analysis of Doppler spread perturbations in OFDM(A) systems
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Robertson, PatrickUNSPECIFIEDUNSPECIFIED
Kaiser, StefanUNSPECIFIEDUNSPECIFIED
Date:November 2000
Journal or Publication Title:European Transactions on Telecommunications
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:11
Publisher:ETT
Status:Published
Keywords:OFDM Multicarrier systems Mobile channels Doppler spread
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W - no assignment
DLR - Research area:Space
DLR - Program:W - no assignment
DLR - Research theme (Project):W - no assignment (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Communications Systems
Deposited By: Robertson, Dr.-Ing. Patrick
Deposited On:23 Apr 2009
Last Modified:31 Jul 2019 19:16

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