Multiband/multichannel power amplifier linearization

Abstract

This chapter addresses the practical problem of signal distortions due to hardware imperfections such as power amplifier (PA) nonlinearity, modulator imperfection, cross-modulation and cross-over interference due to the multiple-frequency (multiband) and multiple-input/output transmission schemes proposed for 4G/5G communication. Basically this chapter targets two problems whose system level description have a certain similarity, so that they can be tackled in a similar digital predistortion system (DPD); however, digital level algorithms and implementation challenges will differ from each other.