Title :
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
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;
Conference_Titel :
Communications and Networking in China (CHINACOM), 2011 6th International ICST Conference on
Conference_Location :
Harbin
Print_ISBN :
978-1-4577-0100-9
DOI :
10.1109/ChinaCom.2011.6158138
