Power amplifier linearization and efficiency improvement techniques for commercial and military applications
Journal
16th International Conference on Microwaves, Radar and Wireless Communications
Date Issued
2007
Author(s)
Abstract
This paper presents some recent developments in the area of power amplifier (PA) linearization and efficiency improvement techniques. Advanced digital pre-distortion (DPD) architectures implemented with digital signal processing (DSP) are discussed. Various results of improvements in intermodulation distortion (IMD) when applied to high power RF amplifiers are presented. Crest factor reduction (CFR) has been shown to substantially increase the power output, and hence the efficiency of PAs operating with high peak-to-average waveforms. The combination of DPD and CFR is shown to improve both efficiency and linearity to levels previously unachievable with analog technologies alone for commercial wireless applications. Independent of these signal processing techniques, polar transmitter circuit architectures have been proposed to improve PA efficiency. A combination of a polar transmitter architecture operating in combination with DPD and CFR is proposed in this paper to address more demanding military wireless communications applications.
SDGs
Type
conference paper