ML estimation of time and frequency offset in OFDM systems |
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| Authors: | van de Beek J.J. Sandell M. Borjesson P.O. |
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| Affiliation: | Div. of Signal Processing, Lulea Univ. of Technol. ; |
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| 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 |
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