Digital enhancement method of power amplifier suitable for 5G signals

The invention provides a digital enhancement method of a power amplifier suitable for 5G signals, and belongs to the technical field of wireless communication. According to the method, a digital enhancement module is arranged to process a generated OFDM sequence source signal, and time domain clipping is carried out on the source signal to reduce the peak-to-average power ratio of the signal; the Volterra model and a linear time-invariant system LTI are cascaded to realize PA modeling; a short-memory GMP model is selected for the nonlinear part, and LTI is realized through a filter; constructing a low-complexity compensation module, reducing a memory effect of a diagonal item, calculating a GMP model coefficient by using an input signal and a feedback signal of the PA, and storing the GMP model coefficient in a lookup table; and multiplying an input signal by a corresponding coefficient of the lookup table and then summing to obtain a final pre-distortion signal. According to the invention, dynamic configurat