Piecewise linear digital pre-distortion system and method for temperature compensation of power amplifier

The invention discloses a piecewise linear digital pre-distortion system and method for power amplifier temperature compensation, and the method comprises the steps: employing a single-frequency radio frequency signal as an input signal # imgabs0 # of a radio frequency power amplifier, and obtaining a feedback signal z1k (j); the N lt; # imgabs 1 #, z1k (j) gt; the corresponding relation is divided into M intervals, and a monomial coefficient a1m and a constant term a0m are given in each segmented interval; selecting different temperature points, and repeating the steps to obtain a plurality of results at different temperatures; fitting to obtain the relationship between a1m and temperature and between a0m and temperature, a1m (T) = f1 (T), and a1m (T) = f2 (T); in the actual operation stage, the temperature of the radio frequency power amplifier is tested, and parameters a1m and a0m are calculated on the basis of the relations a1m (T) = f1 (T) and a1m (T) = f2 (T). According to the invention, the influence o