Patent ID: 8855232

Claim:
A transmission apparatus comprising: a storage unit configured to store a transmission power, and a distortion compensation coefficient to compensate for a distortion that is generated when making a transmission at the transmission power, in correspondence with each other; a signal processing unit configured to perform a distortion compensation process on a transmitting signal, based on the distortion compensation coefficient stored in the storage unit; an updating unit configured to update the transmission power of the transmitting signal that is subjected to the distortion compensation process in certain processes steps; and a transmitting unit configured to transmit the transmitting signal at the transmission power updated by the updating unit, wherein the signal processing unit sets a referring range of the distortion compensation coefficient stored in the storage unit, based on the transmitting signal before performing the distortion compensation process and the transmitting signal having the transmission power thereof updated by the updating unit, and updates the referring range depending on a transmission power that is set by the updating unit a next time and times thereafter when the distortion compensation process is performed.