| 摘要 |
<p>The input signal (110) to a non-linear amplifier (112) is predistorted by injecting a correction signal at coupler (124). To generate the correction signal, a sample of the input signal is amplified using amplifier (130) which has substantially the same distortion generating characteristics as amplifier (112). The output of amplifier (130) is sampled, and the main tone energy is removed at (138), leaving the correction signal for injection to the main signal path. The main portion of the output of amplifier (130) is added coherently to the output of amplifier (112) to enhance efficiency. The correction signal can be manipulated to correct distortion in the output of combiner (152) due to the main portion of the output of amplifier (130).</p> |
