| 摘要 |
To update the control value to a value of higher precision in a predistortion type distortion compensation apparatus for compensating the distortion occurring in an amplifier for amplifying an input signal by the control using a control value corresponding to the level of the input signal. Distortion generating means ( 1 ) generates distortion in an input signal, input signal level detecting means ( 3 ) detects the level of the input signal, distortion control means ( 4 ) controls the distortion generated by the distortion generating means 1 by using a control value corresponding to the level of the detected input signal, distortion component level detecting means ( 7 ) detects the level of distortion component contained in the amplified signal issued from the amplifier ( 2 ), integrating means K 1 to KN integrate the level of the distortion component detected at every level of the detected input signal, and control value updating means ( 10 ) updates the control value corresponding to the level so that the integration result at every level of the input signal may be small.
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