A new carrier frequency synchronization scheme for OFDMA downlink of WiMAX

Author

Mu, Pengcheng ; Xue, Lichang ; Wang, Wenjie ; Yin, Qinye

Author_Institution

Key Lab. for Intell. Networks & Network Security, Xi´´an Jiaotong Univ., Xi´´an, China

fYear

2011

fDate

17-19 Aug. 2011

Firstpage

151

Lastpage

155

Abstract

A new scheme of the carrier frequency synchronization in the OFDMA downlink of WiMAX is proposed in this paper. The proposed method utilizes the preamble structure and the properties of the Inverse Fast Fourier Transform (IFFT) to estimate the carrier frequency offset (CFO) without the knowledge of the content about the actual transmitted preamble. An iterative scheme is proposed to eliminate the influence of the wireless multipath channel to the estimated result. Simulation results show that the proposed method is suitable for the carrier frequency synchronization in the frequency-selective fading channel.

Keywords

OFDM modulation; WiMax; channel estimation; fading channels; fast Fourier transforms; frequency division multiple access; frequency estimation; iterative methods; multipath channels; synchronisation; CFO estimation; IFFT; OFDMA downlink; WiMAX; carrier frequency offset estimation; carrier frequency synchronization scheme; frequency-selective fading channel; inverse fast Fourier transform; iterative scheme; preamble structure; wireless multipath channel estimation; Correlation; Estimation; Frequency synchronization; Mobile communication; OFDM; Receivers; WiMAX; Carrier frequency offset estimation; OFDM; OFDMA; WiMAX; synchronization;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Networking in China (CHINACOM), 2011 6th International ICST Conference on

Conference_Location

Harbin

Print_ISBN

978-1-4577-0100-9

Type

conf

DOI

10.1109/ChinaCom.2011.6158138

Filename

6158138