Blind carrier frequency offset estimation for OFDM systems based on kurtosis

Author

Liu, Yuan ; Mikhael, Wasfy

Author_Institution

Dept. of Electr. & Comput. Eng., Central Florida Univ., Orlando, FL, USA

fYear

2005

fDate

7-10 Aug. 2005

Firstpage

127

Abstract

Orthogonal frequency division multiplexing (OFDM) systems find various applications in wireless communications. In a practical OFDM system, carrier frequency offset (CFO) destroys the orthogonality among the subcarriers, and degrades the system performance. In this paper, a blind carrier frequency offset estimator (BCFOE) is proposed to identify CFO in OFDM systems. The proposed BCFOE is based on kurtosis, and can estimate CFO within the range of half subcarrier spacing. Theoretical analysis shows that the proposed BCFOE outperforms existing techniques as presented in W. Chung and C. R. Johnson (2002) and Y. Yao and G. B. Giannakis (2005) without increasing the computational complexity. Simulation results confirm the effectiveness of the proposed BCFOE.

Keywords

OFDM modulation; blind equalisers; channel estimation; communication complexity; frequency estimation; blind carrier frequency offset estimation; computational complexity; kurtosis based OFDM systems; orthogonal frequency division multiplexing; wireless communications; Bandwidth; Bit error rate; Computational complexity; Computational modeling; Delay estimation; Frequency estimation; Narrowband; OFDM; Training data; USA Councils;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2005. 48th Midwest Symposium on

Print_ISBN

0-7803-9197-7

Type

conf

DOI

10.1109/MWSCAS.2005.1594055

Filename

1594055