DIGITAL PREDISTORTION PROCESSING METHOD AND SYSTEM

摘要

Disclosed are a digital predistortion processing method and system, the method comprising: extracting from a predistortion coefficient parameter table a predistortion parameter corresponding to an input signal, so as to predistort the input signal and obtain a forward transmission signal; amplifying the power of the forward transmission signal to obtain an output signal; acquiring the output signal to obtain a feedback signal; delaying a predetermined number of sampling points so as to acquire the forward transmission signal and obtain a reference signal; conducting synchronization-related calculation on the reference signal and the feedback signal, and calibrating the feedback signal; training a predistortion coefficient according to the reference signal and the calibrated feedback signal; and forming the predistortion coefficient parameter table according to the predistortion coefficient and the amplitude of the input signal. An embodiment of the present invention delays a predetermined number of sampling points for a transmission signal, thus greatly improving radio frequency index (ACPR).