Modeling and simulation of the nonlinear response of receiver amplifiers

This paper describes a modeling method of the nonlinear response of receiver amplifiers 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 response 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 response characteristics of the amplifier.