Nonlinear-Embedding Design Methodology Oriented to LDMOS Power Amplifiers

A Study of LDMOS Switched Mode Power Amplifiers

Adaptive Predistorter Design for Nonlinear High Power Amplifiers

In this paper we present and compare several methods of compensating the nonlinearity of the RF front-end of a wireless system. The baseband compensation techniques have gained more attentions due to the simplicity of DSP implementation and also utilizing adaptive algorithms. Two baseband compensation techniques, namely predistortion and postdistortion (equalization) of the baseband signal are ...

Load Pull Methodology to Characterize Class-E Outphasing Power Amplifiers

A novel load pull methodology to characterize the performance of class-E outphasing power amplifiers is presented. The traditional analysis of the outphasing topology cannot be applied when classE amplifiers are used because these amplifiers do not behave as an ideal current or voltage source. Unlike most other amplifier classes, class-E amplifiers require a phase modulated input signal with co...

Predistortion for Nonlinear Power Amplifiers with Memory

The fusion of voice and data applications, along with the demand for high data-rate applications such as video-on-demand, is making radio frequency (RF) spectrum an increasingly expensive commodity for current and future communications. Although bandwidth-efficient digital modulation alleviates part of the problem by requiring a minimal use of spectral resources, they put an extra design burden...

Predicting spectral regrowth of nonlinear power amplifiers