Computation of Reaction of Amplifier

This paper provides a modeling method of nonlinear reaction of amplifier based on high-order polynomials, using measured data of the amplifier 1dB compression point and the third-order intercept point to calculate the high-order polynomial coefficients. With the coefficients, a nonlinear disturbance reaction model is built for the amplifier. The model is then used in the research for disturbance responses of the amplifier with different interfering signals injected. According to the simulation results, we analyze the nonlinear reaction characteristics of the amplifier.