Paper Info
Title
Effect and adaptive correction of impedance mismatch between antenna and power amplifier on digital predistortion
Abstract
Digital predistortion (DPD) is a powerful and cost-effective technique to linearize Power Amplifier (PA). In radio-frequency emitters, the PA and antenna are contiguous and impedance mismatch between the two is likely to occur during emission. DPD linearization performances may be seriously degraded as a result. In this paper, firstly, we propose a new model representing the effects of impedance mismatch between PA and antenna block on the feedback signal that is measured with a coupler to adapt the predistortion. That model takes into account the coupler directivity. Secondly, we study the effect of antenna mismatch on adaptive predistortion and thirdly we propose a solution based on an adaptive correction gain to preserve linearization performances under mismatch conditions. These proposals are evaluated and validated on signals from a 120 W Doherty PA.
Year
DOI
Venue
2013
10.1109/NEWCAS.2013.6573622
NEWCAS
Keywords
Field
DocType
antennas,power amplifiers,waveguide couplers,dpd linearization performance,doherty pa,adaptive correction gain,adaptive predistortion,antenna block,antenna mismatch,coupler directivity,digital predistortion,effect correction,feedback signal,impedance mismatch,power 120 w,power amplifier linearization,radiofrequency emitters,impedance
Directivity,Computer science,Electronic engineering,Object-relational impedance mismatch,Electrical engineering,Predistortion,Linearization,Amplifier
Conference
ISSN
ISBN
Citations 
2472-467X
978-1-4799-0618-5
0
PageRank 
References 
Authors
0.34
2
4
Name
Order
Citations
PageRank
Mbaye, A.131.47
Geneviève Baudoin213819.08
Martine Villegas3868.77
Gotthans, T.4144.47