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.