Patent ID: 8520772

Claim:
A communication device that compensates a distortion of a transmission signal, amplifies the compensated transmission signal by an amplifier, and outputs the amplified signal, the device comprising: a storage unit that stores a transmission characteristic of a transmission power of the communication device; a correcting unit that calculates a power value at a set transmission frequency by referring to the storage unit, and corrects a feedback signal of the transmission signal amplified by the amplifier based on the calculated power value and a maximum transmission power defined by the communication device; and a calculating unit that calculates a distortion compensation coefficient based on the transmission signal and the feedback signal corrected, wherein: the correcting unit comprises a correction value calculation unit that obtains power values corresponding to two frequencies close to the set transmission frequency by referring to the storage unit, calculates a power value of the set transmission frequency from a linear approximation of the obtained power values, and calculates a difference between the calculated power value and the maximum transmission power defined by the communication device; and a multiplier that multiplies the feedback signal by the difference calculated by the correction value calculation unit.