Method for extracting fingerprint characteristic of narrowband signal power amplifier and device thereof

The invention relates to a method for extracting fingerprint characteristics of a narrowband signal power amplifier and a device thereof. The method includes sequentially carrying out automatic gain control, match filtering, frequency compensation and symbol synchronization on received signals to obtain correction signals, sequentially carrying out automatic gain control on received signals, sequentially carrying out matching filtering, frequency compensation and symbol synchronization on received signals, demodulating the received signal, shaping filtering and recovering the signal in turn toobtain the recovered power amplifier excitation signal; establishing the Taylor series behavior model of power amplifier; and according to the modified signal and the restored power amplifier excitation signal, constructing the fingerprint feature extraction model of power amplifier, extracting the Taylor series coefficients of power amplifier as the fingerprint feature quantities by a least square method, training suppo