DIGITAL PREDISTORTION PROCESSING METHOD AND SYSTEM

摘要

The present invention discloses a digital predistortion processing method and system. The method includes: extracting a predistortion parameter corresponding to an input signal from a predistortion coefficient parameter list to perform predistortion processing on the input signal to obtain a forward sending signal; performing power amplification processing on the forward sending signal to obtain an output signal; collecting the output signal to obtain a feedback signal; collecting the forward sending signal after delaying for a preset number of sampling points to obtain a reference signal; performing synchronous correlation calculation on the reference signal and the feedback signal to calibrate the feedback signal; training a predistortion coefficient according to the reference signal and the calibrated feedback signal; and forming a predistortion coefficient parameter list according to the predistortion coefficient and the amplitude of the input signal. In this embodiment, the transmission signal is delayed for a preset number of sampling points to greatly perfect the radio frequency index ACPR.