Title :
A blind CFO estimator based on smoothing power spectrum for OFDM systems
Author :
Wu, Lu ; Zhang, Xian-Da ; Li, Pei-Sheng ; Su, Yong-Tao
Author_Institution :
Dept. of Autom., Tsinghua Univ., Beijing, China
fDate :
7/1/2009 12:00:00 AM
Abstract :
Carrier frequency offset (CFO) estimation is a critical problem in orthogonal frequency-division multiplexing (OFDM) systems. This letter proposes a blind CFO estimator based on smoothing the signal power spectrum. A closed-form CFO estimate is also presented, which greatly reduces the computational complexity of the proposed method. Analysis and simulation results show that the proposed estimator is very effective for OFDM systems.
Keywords :
OFDM modulation; computational complexity; smoothing methods; OFDM; blind carrier frequency offset estimator; computational complexity; orthogonal frequency-division multiplexing systems; signal power spectrum smoothing; Analytical models; Bandwidth; Computational complexity; Computational modeling; Discrete Fourier transforms; Frequency division multiplexing; Frequency estimation; Information science; OFDM; Power smoothing; Carrier frequency offset (CFO), power spectrum, orthogonal frequency-division multiplexing (OFDM);
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2009.07.070067
