Behavioral Model of Power Amplifier Using a Discrete-Time Impulse Response Representation

Broadband transfer functions of radio frequency (RF) power amplifiers (PA) can be developed from the frequency-dependent AM-AM and AM-PM characteristics of the PAs. The time-domain representation of these broadband transfer functions proposed in this letter can be viewed as a PA behavioral model. This PA behavioral model is capable of instantaneously convolving with multi-tone input signals to produce output signals. When compared to conventional quadrature models, which are also based on the measurement of AM-AM and AM-PM characteristics, experiments show the proposed model to be more accurate and efficient in broadband PA behavioral modeling.