Patent ID: 7848296

Claim:
An apparatus for generating channel information at a terminal wirelessly communicable with a base station in a mobile communication system, said apparatus comprising: an estimation means for estimating, for each path, current channel information of a multi-carrier signal received by the terminal from the base station; a short-period channel information generation means for predicting channel information after a predetermined minimum transmission delay time based on the current channel information estimated by the estimation means to generate short-period channel information; a long-period channel information generation means for deriving statistic information of an error between the channel information predicted by the short-period channel information generation means and actual channel information at the time of transmission to produce long-period channel information; and a transmission means for feeding back the short period channel information and the long period channel information to the base station, to enable the base station to decide a modulation/coding scheme for traffic data to be transmitted to said terminal; wherein the channel information after the predetermined minimum transmission delay time for each path and each carrier is predicted by using the estimated current channel information as follows: ĥ l [n+D]=f ( h l [n], h l [n− 1 ], . . . , h l [n−P+ 1]) where h l [n] indicates a channel of complex form at a time n of the l th path, P denotes a degree of predictor and f represents a prediction filter, D is the predetermined minimum transmission delay time.