Detail publikačního 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.

Originální název

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

Anglický název

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

Druh

Stať ve sborníku v databázi WoS či Scopus

Originální 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.

Anglický 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.

Klíčová slova v angličtině

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

Autoři

GÖTTHANS, T.; MARŠÁLEK, R.; POSPÍŠIL, M.; URBANEC, T.; KRÁL, J.; BLUMENSTEIN, J.

Rok RIV

2019

Vydáno

08.05.2018

ISBN

978-1-5386-1290-3

Kniha

2018 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR)

Strany od

79

Strany do

82

Strany počet

4

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"
}