Title :
ML estimation of time and frequency offset in OFDM systems
Author :
Van de Beek, Jan-Jaap ; Sandell, Magnus ; Borjesson, Per Ola
Author_Institution :
Div. of Signal Processing, Lulea Univ. of Technol., Sweden
fDate :
7/1/1997 12:00:00 AM
Abstract :
We present the joint maximum likelihood (ML) symbol-time and carrier-frequency offset estimator in orthogonal frequency-division multiplexing (OFDM) systems. Redundant information contained within the cyclic prefix enables this estimation without additional pilots. Simulations show that the frequency estimator may be used in a tracking mode and the time estimator in an acquisition mode
Keywords :
frequency division multiplexing; frequency estimation; maximum likelihood estimation; synchronisation; tracking; OFDM systems; acquisition mode; carrier-frequency offset estimator; cyclic prefix; maximum likelihood; orthogonal frequency-division multiplexing; redundant information; symbol-time estimator; time offset; tracking mode; AWGN; Discrete Fourier transforms; Frequency division multiplexing; Frequency estimation; Frequency synchronization; Maximum likelihood estimation; OFDM; Radio broadcasting; TV broadcasting; Uncertainty;
Journal_Title :
Signal Processing, IEEE Transactions on
