An improved method for emitter identification based on nonlinear characteristics of power amplifiers

An improved method is proposed for emitter identification in this paper, which is based on nonlinearity character of the power amplifier. Assuming that the input signal is narrow band and low-power, it can bi got that the harmonic features from the analyzing of the signal. Besides, Harmonic features is only related to the Taylor series coefficients. This paper proposed an improved method based on linear regression combined with normal mapping according to the approximate linear characteristic of the amplifier feature. Finally, an contrastive experiment are performed with 10 TBR-121A emitters. The experimental results show that the improved method is better than the traditional method in the rate of correct identification. It shows that the improved method is effective.