DocumentCode
1916291
Title
Development Environment for EER and Envelope Tracking RF transmitters
Author
Rautio, Timo ; Hietakangas, Simo ; Rahkonen, Timo
Author_Institution
Dept. of Electr. Eng. & Inf. Technol., Oulu Univ.
fYear
2006
fDate
Nov. 2006
Firstpage
151
Lastpage
154
Abstract
Power amplifier (PA) efficiency is a critical factor in any portable device. Two of the most popular architectures to improve the efficiency, envelope tracking (ET) and envelope elimination and restoration (EER), are discussed in this paper. A test system for characterization of such a system is presented. A Class E based EER system is tested and characterized and software corrections are implemented to linearize the transmitter. Test results show an ACPR improvement of 15 dB by only tuning the phase signals amplitude and adding AM/PM correction. EVM improves from 2.8% to 0.71% at the same time
Keywords
power amplifiers; radio transmitters; AM/PM correction; Class E based EER system; development environment; envelope elimination; envelope restoration; envelope tracking RF transmitters; phase signals amplitude; power amplifier; software corrections; Envelope detectors; Linearity; Power system restoration; Radio frequency; Radiofrequency amplifiers; Signal restoration; Switches; System testing; Transmitters; Voltage;
fLanguage
English
Publisher
ieee
Conference_Titel
Norchip Conference, 2006. 24th
Conference_Location
Linkoping
Print_ISBN
1-4244-0772-9
Type
conf
DOI
10.1109/NORCHP.2006.329266
Filename
4126969
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