Detail výsledku

On the Lower I/Q Imbalance Sensitivity Using Real-valued Feedback of Digital Predistortion

GÖTTHANS, T.; MARŠÁLEK, R.; POSPÍŠIL, M.; URBANEC, T.; KRÁL, J.; BLUMENSTEIN, J. On the Lower I/Q Imbalance Sensitivity Using Real-valued Feedback of Digital Predistortion. In 2018 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR). 2018. p. 79-82. ISBN: 978-1-5386-1290-3.
Typ
článek ve sborníku konference
Jazyk
anglicky
Autoři
Götthans Tomáš, doc. Ing., Ph.D., UREL (FEKT)
Maršálek Roman, prof. Ing., Ph.D., UREL (FEKT)
Pospíšil Martin, Ing.
Urbanec Tomáš, Ing., Ph.D., UREL (FEKT)
Král Jan, Ing., Ph.D., UREL (FEKT)
Blumenstein Jiří, doc. Ing., Ph.D., UREL (FEKT)
Abstrakt

The adaptive digital predistortion is currently widely
used to compensate for the nonlinearities. Usually the observing
(feedback) path of the predistorter is required to be very
accurate. That means it is compensated for any radio frequency
front-end imperfections.
In this paper we demonstrate that recently proposed (realvalued)
digital predistortion algorithm employing only one of
the signals in the quadrature pair implies the reduced sensitivity
of the predistorter adaptation to the I/Q modulator imbalance in
the feedback path. The lower sensitivity is demonstrated using
both simulation as well as by an experiment conducted using
the mm-Wave setup with integrated direct-conversion transceiver
with important imbalances in both transmitting (Tx) as well as
in receiving (Rx) path.

Klíčová slova

Linearization, predistortion, I/Q impairments, real-valued feedback.

Rok
2018
Strany
79–82
Sborník
2018 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR)
Konference
2018 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR)
ISBN
978-1-5386-1290-3
DOI
10.1109/PAWR.2018.8310073
UT WoS
000458437700023
EID Scopus
2-s2.0-85050741975
BibTeX 
@inproceedings{BUT149722,
  author="Tomáš {Götthans} and Roman {Maršálek} and Martin {Pospíšil} and Tomáš {Urbanec} and Jan {Král} and Jiří {Blumenstein}",
  title="On the Lower I/Q Imbalance Sensitivity Using Real-valued Feedback of Digital Predistortion",
  booktitle="2018 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR)",
  year="2018",
  pages="79--82",
  doi="10.1109/PAWR.2018.8310073",
  isbn="978-1-5386-1290-3"
}
Pracoviště
Ústav radioelektroniky (UREL)
Nahoru