Abstract
In this paper, we use the adaptive function model to improve FPGA digital pre-distortion technique, design the adaptive pre-distortion function and algorithm, and adopt PC-CFR technique to process digital distortion problem in high order modulation, and obtain very good effect of digital signal processing. In order to verify the validity and reliability of PC-CFR technology, we use Agilent 89600 VSA software to exquisite power output signal before and after the broadband power amplifier pre-distortion. The results shows that before PC-CFR pre-distortion processing, phase difference of AM/PM reaches a maximum of 0.258, signal distortion is more serious; and after the PC-CFR pre-distortion processing, phase difference is only 0.021, the minimum is 0.005, which controls the distortion signal and improves the signal transmission quality. It provides technical reference to study the broadband power amplifier technology.
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