| 摘要 |
<p>A method of and apparatus for adaptive pre-distortion of a digital base band signal include applying a pre-distortion to a digital base band signal and adapting the pre-distortion in dependence upon a comparison between a pre-distorted base band signal and a digital base band derived from an amplified radio frequency signal. Pre-distortion is applied to both the signal path and a feedback path used to derive the digital base band signal from the amplified radio frequency signal. In a first embodiment non-linear pre-distortion is applied to both paths. In a second embodiment non-linear and linear pre-distortion is applied to both paths. In a third embodiment an addition linear pre-distortion is applied to the feedback path.</p> |
