APPARATUS AND METHOD FOR DETERMINING CHANNEL INFORMATION IN OFDM SYSTEM AND RECORDING MEDIUM FOR STORING PROGRAM

摘要

PURPOSE: An apparatus and a method for determining channel information in an OFDM system and a recording medium for storing a program are provided to improve the adaptive modulation/code performance by feeding back only the channel information of a corresponding sub-carrier. CONSTITUTION: Information of sub-carrier groups is received from a base station(S1). The best sub-carrier group is selected from the sub-carrier groups by considering the channel environment(S2). A minimum modulation/coding scheme is obtained from modulation/coding schemes(S3). A channel variation level and a transmission bit within each sub-carrier group are obtained according to each modulation/code scheme by increasing gradually the modulation/coding scheme level(S4-S8). A representative value is determined by using the modulation/code scheme and the channel variation level(S9,S10). The information related to the modulation/code scheme and the channel change level for the corresponding sub-carrier is fed back to the base station(S11).