Charecterising a power amplifier to determine small signal gain and large signal gain

摘要

A power amplifier (124) having an input port receiving an input signal and an output port to provide an output signal representative of an amplified input signal. A signal processing function (128) is operably coupled to the power amplifier (124) and arranged to derive small signal gain and large signal gain values of the power amplifier (124) by calculating a Cumulative Distribution Function (CDF) or a Complementary Cumulative Distribution Function (CCDF) of the input signal and amplified output signal. The power amplifier (124) may be contained in a wireless communication unit (100).