| 摘要 |
The present invention relates to a predistortion linearizer for a power amplifier which is capable of improving nonlinear character of a high power amplifier. The predistortion linearizer for the power amplifier includes first and second envelope detectors, which separately detect an envelope of input signals and output signals, respectively, a DSP, which adjusts a tally of a work function by comparing the output signals of the first and the second envelope detector, and a work function generator, which generates a work function from an envelope of input signals to output gain and phase control voltage in accordance with work function tally inputted from the DSP. It also includes a vector modulator, which pre-distorts the input signal in accordance with the control voltages inputted from the work function generator to output a distortion compensation signal to the power amplifier.
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