Estimation of OFDM Integer Frequency Offset over Rapidly Time-Varying Channels

Young-Hwan YOU
Sung-Jin KANG
Dae-Ki HONG
Jang-Yeon LEE
Jin-Woong CHO

Publication
IEICE TRANSACTIONS on Communications   Vol.E89-B    No.7    pp.2099-2101
Publication Date: 2006/07/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.7.2099
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
OFDM,  time-varying channel,  integer frequency offset,  pilot symbol,  

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Summary: 
In this letter, we present a simple way of estimating the integer frequency offset of orthogonal frequency division multiplexing (OFDM) system over a rapidly time-varying channel. By utilizing the channel responses of neighboring subcarriers within one pilot symbol, the frequency offset estimator is derived. We show by simulation that the proposed estimator can accurately estimate the integer frequency offset with reduced computational burden.