Publication result detail

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.

Original Title

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

English Title

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

Type

Paper in proceedings (conference paper)

Original Abstract

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.

English abstract

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.

Keywords

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

Key words in English

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

Authors

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

RIV year

2019

Released

08.05.2018

ISBN

978-1-5386-1290-3

Book

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

Pages from

79

Pages to

82

Pages count

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"
}