Method for maximum likelihood frequency offset estimation in mobile communication system of fast rayleigh fading channel environments

The present invention relates to a frequency offset estimation apparatus and method in a mobile communication system, especially in a communication system using an orthogonal frequency division multiplexing fast Rayleigh fading channel (Fast Rayleigh Fading Channel) under an apparatus and method for frequency offset estimation will be. The present invention relates to a method for estimating a frequency offset in a mobile communication system for transmitting data signals by splitting the split to send or total frequency of the data signal bandwidth to a certain frequency band in a time division manner into a plurality of sub-frequency bands, fast fading the process of modeling (modeling) in a linear or polynomial representation of the sum-order term which changes with a constant slope along the channel in a constant term and a time fixed in correspondence with the modeling according to the term of each order of the channel and, after performing the modeling channel applying a polynomial model in the modeling of the variable to be characterized in that it comprises the step of estimating the channel and the frequency offset in the same time the maximum likelihood (Maximum Likelihood) conditions using a training Shin Hoyeol (training sequence). OFDM, frequency offset estimation, maximum likelihood estimation, fast Rayleigh fading channel