| 摘要 |
PROBLEM TO BE SOLVED: To provide a system and method for generating a pilot signal to be obtained by substantially eliminating or fairly reducing the distortion caused by an amplifier. SOLUTION: A distortion reduction system uses upstream signal information like a carrier frequency in an input signal, adjusts at least one frequency for a pilot signal which is injected into the distortion reduction system and is detected in an output of the distortion reduction system, and improves distortion reduction of the changing output signal. For example, a process circuit obtains a traffic frequency which forms a signal to be amplified by a feedforward structure. The process circuit determines at least one frequency for the pilot signal, and adjusts a pilot signal generator to at least one frequency for the pilot signal by use of the traffic frequency. The feedforward structure receives a signal to be amplified and provides a replica of the signal on a main signal path and a feedforward path.
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