This paper proposes a new joint symbol timing, symbol period andfrequency offset estimation method for orthogonal multi-carriermodulation signal. The method is based on the maximum likelihoodcriterion making effective use of “cyclostationary property”of the orthogonal multi-carrier modulation signal, and requires nospecial signal such as pilot tones to assist the estimation. After alikelihood function for the estimation is derived, an optimum estimatorwhich maximizes the likelihood function is proposed. In addition, inorder to reduce the estimator complexity, a suboptimum estimator is alsoproposed. Computer simulation results show that the optimum estimatorrequires only about 10 observation symbols for the accurate estimationin a frequency selective slow Rayleigh fading channel as well as in anadditive white Gaussian noise channel, and the suboptimum estimator iseffective because of the low complexity, although it requires a longerobservation period
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