Title :
A closed-form blind CFO estimator based on frequency analysis for OFDM systems
Author :
Wu, Lu ; Zhang, Xian-Da ; Li, Pei-Sheng ; Su, Yong-Tao
Author_Institution :
Dept. of Autom., Tsinghua Univ., Beijing
fDate :
6/1/2009 12:00:00 AM
Abstract :
This letter proposes a blind carrier frequency offset (CFO) estimator for orthogonal frequency-division multiplexing (OFDM) systems based on the frequency analysis of the received signal, and derives a closed-form CFO estimate. Since only one OFDM symbol is utilized instead of multi-symbol averaging, the proposed method is effective even when the CFO is time varying. Finally, analysis and simulation results indicate the outstanding performance of the proposed estimator.
Keywords :
OFDM modulation; blind source separation; frequency estimation; OFDM symbol; OFDM system; blind carrier frequency offset estimator; closed-form blind CFO estimator; frequency analysis; multisymbol averaging; orthogonal frequency-division multiplexing system; received signal; Analytical models; Computational complexity; Degradation; Discrete Fourier transforms; Frequency division multiplexing; Frequency estimation; Information science; OFDM; Performance analysis; Signal analysis; Orthogonal frequency-division multiplexing (OFDM), carrier frequency offset (CFO), frequency analysis.;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2009.06.070009
