Patent ID: 8385857

Claim:
A wireless communication apparatus configured to amplify a transmission signal with an amplifier and transmit the amplified transmission signal, the wireless communication apparatus comprising: a memory configured to store a distortion compensation coefficient for compensating a distortion characteristic of the amplifier; an electrical-power measuring unit configured to measure electrical power of the transmission signal; a gain control unit configured to calculate a gain adjustment value for correcting the distortion compensation coefficient stored in the memory based on a power value measured by the electrical-power measuring unit; a distortion-compensation processing unit configured to perform distortion compensation on the transmission signal based on the distortion compensation coefficient stored in the memory and the gain adjustment value; and a distortion-compensation-coefficient updating unit configured to calculate the distortion compensation coefficient based on the distortion-compensated transmission signal input to the amplifier and a feedback signal of the amplified transmission signal output from the amplifier and updates the distortion compensation coefficient stored in the memory with the calculated distortion compensation coefficient, wherein the electrical-power measuring unit measures a power value for each unit time for each of the transmission signal and the feedback signal, and wherein the gain control unit calculates the gain adjustment value based on a ratio of a power value of the transmission signal in a predetermined unit time to a power value of the feedback signal corresponding to the transmission signal in the predetermined unit time.