A method and apparatus for performing channel compensating in a mobile communication terminal calculates a channel prediction value by varying an energy cumulative interval based on channel variation occurring in a radio channel. In accordance with one illustrative embodiment, the energy cumulative interval is varied from a minimum 2T to a maximum 6T according to a traveling speed of a terminal. As a result of this compensation, channel prediction error is reduced. And accordingly more accurate channel compensation is performed.

 
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