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ML estimation of time and frequency offset in OFDM systems

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3 Author(s)
van de Beek, J.-J. ; Div. of Signal Processing, Lulea Univ. of Technol., Sweden ; Sandell, M. ; Borjesson, P.O.

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

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Signal Processing, IEEE Transactions on  (Volume:45 ,  Issue: 7 )