Adaptive linearization digital signals: I and Q [HDTV system PA linearization applications]

Abstract

Nowadays, the research and development of the modem RF power amplifier have been demanded an accurate study concentrated on the linearity. Besides the distortions caused by the nonlinear devices, we have been having a constant improvement in the implementation of new modulation techniques by exploring the spectrum properties. The nonlinear performance caused by the devices is a fundamental effect, which have invoked the attention of many researchers in many famous research centers around the entire world. They have been used extremely in the actual telecommunications systems, being the main focus in the specific case of the transmission of digital signals for TV. In this paper, we present some fundamental steps already accomplished in the project of an equipment for digital transmission HDTV systems that the INATEL with the Linear Electronic Equipment Co. have been implementing in Brazil.Index terms -RF Power Amplifier, Adaptive Linearization and Digital Signals: l a n d Q.