Paper Info
Title
A digital predistortion assisted hybrid supply modulator for envelope tracking power amplifiers.
Abstract
In this paper, a novel digital predistortion assisted supply modulator is presented. The proposed modulator is suitable for envelope tracking power amplifiers. In this topology, a digitally controlled linear power amplifier is used to compensate the switching noise ripples of the switching modulator. The proposed structure is evaluated with a 0.18µm CMOS process technology. The results show up to 9% static efficiency improvement in comparison with previous one-phase and two-phase architectures. It is shown that for a 5MHz WiMAX signal with a 6.7dB PAPR at 26.8dBm output power, a maximum average efficiency of 73.5% is achieved in the proposed design.
Year
DOI
Venue
2016
10.1016/j.vlsi.2015.04.002
Integration
Keywords
Field
DocType
Envelope tracking (ET),Supply modulator,Digital control,Power amplifier (PA),WiMAX
Computer science,Linearity,Linear stage,Inductor,Modulation,Electronic engineering,Bandwidth (signal processing),Digital control,Predistortion,Amplifier
Journal
Volume
Issue
ISSN
52
C
0167-9260
Citations 
PageRank 
References 
3
0.44
11
Authors
3
Name
Order
Citations
PageRank
Atefeh Salimi131.12
Rasoul Dehghani2237.93
Abdolreza Nabavi34717.09