Some new memoryless behavioural models of wireless transmitter solid state power amplifiers

This paper will briefly review aspects of memoryless nonlinear power amplifier behavioural models in the context of the more popular ones — the complex power series expansion, the Saleh model, and the Bessel-Fourier (B-F) model. Other models considered will be the Fourier model, the Hetrakul & Taylor model and the Berman & Mahle model. Static envelope characteristics, i.e., static AM-AM and/or AM-PM characteristics, are taken as the basis for defining a behavioural model as memoryless. Some new insights and new developments are presented including a new modified Saleh model — evolved to overcome some particular weaknesses of the Saleh model — and considerations on applying the B-F model and its linkage to the Fourier model. Some comparative considerations among models will be presented, through their application to modelling an LDMOS amplifier amplifying a WCDMA signal.