Patent ID: 7492701

Claim:
A method of controlling adaptive modulation and coding (AMC) in an orthogonal frequency division multiplexing (OFDM) communication system in which an entire frequency band is divided into a plurality of sub-carrier bands, comprising the steps of: (1) calculating a power and a number of transmission bits for each of the sub-carriers in a predetermined method for each coding method available in the OFDM communication system; (2) calculating a data rate for each coding method based on the number of transmission bits and the power for each sub-carrier; (3) determining a coding method having a highest of the calculated data rates for the OFDM communication system; and (4) determining a modulation method for the OFDM communication system according to a number of transmission bits in the determined coding method; wherein the step of calculating the number of transmission bits and the power for each sub-carrier for each of the coding methods is performed by max i ∈ { 1 , … ⁢ , V } m 1 , ⁢ ⁢ … ⁢ ⁢ m N P ~ 1 , … ⁢ , P ~ N ⁢ ⁢ R = r ⁡ ( C i ) ⁢ ⁢ ∑ n = 1 N ⁢ m n where i is an index of a coding method available in the OFDM communication system, R(C i ) is a coding rate of an ith coding method C i , and m n is a number of transmission bits for an nth sub-carrier P n is transmit power of bits transmitted on the nth sub-carrier.