DocumentCode
88617
Title
Demystifying Envelope Tracking: Use for High-Efficiency Power Amplifiers for 4G and Beyond
Author
Zhancang Wang
Author_Institution
Microsoft Mobile (China) Investment Co., Ltd., Beijing, China
Volume
16
Issue
3
fYear
2015
fDate
Apr-15
Firstpage
106
Lastpage
129
Abstract
The efficiency of a radio-frequency (RF) power amplifier (PA) is generally defined as the ratio between the desired transmitted radio power and the total power from a power supply, which is rather low in average with modern high peak-to-average-power-ratio (PAPR) signals, as illustrated in Figure 1(a). Consequently, a small improvement in the efficiency of the RF PA can have substantial benefits for a wireless system and cut the overall costs of system operations.
Keywords
4G mobile communication; radiofrequency power amplifiers; 4G-and-beyond wireless system; PAPR signal; RF PA efficiency; desired transmitted radio power; envelope tracking; high-efficiency power amplifiers; peak-to-average-power-ratio signal; power supply; radio-frequency power amplifier; 4G mobile communication; Bandwidth; Heating; Hybrid power systems; Modulation; Peak to average power ratio; Power amplifiers; Radio frequency; Transmitters;
fLanguage
English
Journal_Title
Microwave Magazine, IEEE
Publisher
ieee
ISSN
1527-3342
Type
jour
DOI
10.1109/MMM.2014.2385351
Filename
7054699
Link To Document