| 摘要 |
Provided is a distortion compensation apparatus to prevent divergence of distortion compensation coefficients caused by an abnormal distortion compensation coefficient value. The distortion compensation apparatus includes a storage for storing a distortion compensation coefficient in a specified write address, and outputting adistortioncompensation coefficientstoredinaspecified readout address; a predistortion portion for performing distortion compensation processing onto a transmission signal, using the distortion compensation coefficient being output from the storage; and a distortion compensator for calculating a distortion compensation coefficient based on the transmission signal before the distortion compensation processing and the transmission signal after beingamplified by anamplifier.The distortion compensator further reads out the distortion compensation coefficients stored in the storage, extracts a distortion compensation coefficient satisfying a predetermined condition, and performs correction processing to reduce the amplitude of the extracted distortion compensation coefficient. |
