Title :
Comments on "Class of Cyclic-Based Estimators for Frequency-Offset Estimation of OFDM Systems"
Author :
Wu, Yik-Chung ; Serpedin, Erchin
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
fDate :
3/1/2005 12:00:00 AM
Abstract :
This comment corrects several errors found in the paper, "Class of Cyclic-Based Estimators for Frequency-Offset Estimation of OFDM Systems". In addition, we show that the minimum variance unbiased estimator for frequency offset derived in the above paper is the maximum-likelihood estimator when the timing delay is perfectly known.
Keywords :
OFDM modulation; delays; frequency estimation; maximum likelihood estimation; probability; OFDM system; cyclic-based estimator; frequency-offset estimation; maximum-likelihood estimator; minimum variance unbiased estimator; timing delay; Codes; Communications Society; Delay estimation; Equations; Error correction; Frequency estimation; Maximum likelihood estimation; OFDM; Probability density function; Timing;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2005.843444
