Analysis of nonlinear amplifiers with Gaussian input signals on the basis of complex gain measurements

We analyse passing complex Gaussian signals through nonlinear power amplifiers. Using the coefficients of the power series expansion of the amplifier complex gain, we obtain closed‐form expressions for the output power and the linear gain of the amplifier. The simplicity and accuracy of the derived formulas make the obtained results useful for practical applications, for example in OFDM or CDMA systems.