OFDM Carrier Frequency Offset Estimation Methods With Improved Performance

Author

Shim, Eu-Suk ; Kim, Sang-Tae ; Song, Hyoung-Kyu ; You, Young-Hwan

Author_Institution

Sejong Univ., Seoul

Volume

53

Issue

2

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

567

Lastpage

573

Abstract

Orthogonal frequency division multiplexing (OFDM) systems are highly sensitive to carrier frequency offset and symbol timing error. This paper deals with estimation method of integer frequency offset (IFO) without the aid of pilot symbols. The proposed IFO estimator exploits two consecutive identical OFDM data symbols with only change of phase. In order to improve the accuracy of the IFO estimator, receive diversity is adopted. To demonstrate the efficiency of the proposed IFO estimators, comparisons are made with other existing estimators in terms of error performance, estimation range, and complexity.

Keywords

OFDM modulation; radio receivers; IFO estimator; OFDM systems; carrier frequency offset estimation; complexity; error performance; estimation range; integer frequency offset; orthogonal frequency division multiplexing; receive diversity; symbol timing error; Estimation error; Frequency diversity; Frequency division multiplexing; Frequency estimation; Frequency synchronization; Maximum likelihood estimation; OFDM; Phase estimation; Timing; Wireless networks; Integer frequency offset; OFDM; receive diversity; synchronization;

fLanguage

English

Journal_Title

Broadcasting, IEEE Transactions on

Publisher

ieee

ISSN

0018-9316

Type

jour

DOI

10.1109/TBC.2007.894793

Filename

4215121