Publication:
A comparison of timing methods in orthogonal frequency division multiplexing (OFDM) systems

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Authors
Oz, Ersoy
Subjects
Advisors
Cristi, Roberto
Tummala, Murali
Date of Issue
2004-09
Date
Publisher
Monterey, CA; Naval Postgraduate School
Language
Abstract
Orthogonal frequency division multiplexing (OFDM) is being used by wireless local area network (WLAN) standards, such as IEEE 802.11a, and wireless metropolitan area network (MAN) standards, such as IEEE 802.16a. OFDM is a very efficient communications scheme for wireless ADHOC networks. However, the wireless environment causes inter-symbol interference (ISI) and inter-carrier interference (ICI). Estimating the starting point of an OFDM symbol must be handled efficiently and effectively to reduce the errors. OFDM must be time synchronized to prevent inter-symbol interference (ISI) and inter-carrier interference (ICI). Many techniques exist to realize timing synchronization in OFDM systems. In this thesis, the need for timing synchronization, the timing errors, and the performance of different techniques under a variety of mobile channel models (indoor and outdoor) are investigated, and simulation performance results for each technique under different channel models are presented.
Type
Thesis
Description
Series/Report No
Organization
Naval Postgraduate School (U.S.)
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NPS Report Number
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Format
xx, 175 p. : ill. (some col.) ;
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Distribution Statement
Approved for public release; distribution is unlimited.
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The copyright is reserved by the copyright owner.
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