Implementation and Performance of Analog Quadrature Modulation Error Compensator for Digital Linearized Power Amplifier

Jin-Seob MOON; Joo-Seong JEON

Implementation and Performance of Analog Quadrature Modulation Error Compensator for Digital Linearized Power Amplifier

Jin-Seob MOON, Joo-Seong JEON

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Direct conversion techniques commonly used for the transmitter in basestation rely on analog performance of the quadrature modulator. In this paper, simulated results show that imperfections in analog quadrature modulation--gain and phase error and dc offset--have a devastating effect on digital predistortion for power amplifier linearization circuits. We construct compensation circuit to remove these errors, and conduct an experiment. The imbalance errors are compensated by using the output spectrum of modulator. The image spurious (-56.74 dBm) with gain, phase and the dc offset spurious (-43.83 dBm) are reduced to -93.21 dBm and -93.56 dBm, respectively. These experimental results illustrate that modulation errors can be eliminated.

Publication: IEICE TRANSACTIONS on Communications Vol.E86-B No.10 pp.2975-2981

Publication Date: 2003/10/01

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Type of Manuscript: PAPER

Category: Communication Devices/Circuits

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Jin-Seob MOON, Joo-Seong JEON, "Implementation and Performance of Analog Quadrature Modulation Error Compensator for Digital Linearized Power Amplifier" in IEICE TRANSACTIONS on Communications, vol. E86-B, no. 10, pp. 2975-2981, October 2003, doi: .
Abstract: Direct conversion techniques commonly used for the transmitter in basestation rely on analog performance of the quadrature modulator. In this paper, simulated results show that imperfections in analog quadrature modulation--gain and phase error and dc offset--have a devastating effect on digital predistortion for power amplifier linearization circuits. We construct compensation circuit to remove these errors, and conduct an experiment. The imbalance errors are compensated by using the output spectrum of modulator. The image spurious (-56.74 dBm) with gain, phase and the dc offset spurious (-43.83 dBm) are reduced to -93.21 dBm and -93.56 dBm, respectively. These experimental results illustrate that modulation errors can be eliminated.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e86-b_10_2975/_p

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@ARTICLE{e86-b_10_2975,
author={Jin-Seob MOON, Joo-Seong JEON, },
journal={IEICE TRANSACTIONS on Communications},
title={Implementation and Performance of Analog Quadrature Modulation Error Compensator for Digital Linearized Power Amplifier},
year={2003},
volume={E86-B},
number={10},
pages={2975-2981},
abstract={Direct conversion techniques commonly used for the transmitter in basestation rely on analog performance of the quadrature modulator. In this paper, simulated results show that imperfections in analog quadrature modulation--gain and phase error and dc offset--have a devastating effect on digital predistortion for power amplifier linearization circuits. We construct compensation circuit to remove these errors, and conduct an experiment. The imbalance errors are compensated by using the output spectrum of modulator. The image spurious (-56.74 dBm) with gain, phase and the dc offset spurious (-43.83 dBm) are reduced to -93.21 dBm and -93.56 dBm, respectively. These experimental results illustrate that modulation errors can be eliminated.},
keywords={},
doi={},
ISSN={},
month={October},}

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TY - JOUR
TI - Implementation and Performance of Analog Quadrature Modulation Error Compensator for Digital Linearized Power Amplifier
T2 - IEICE TRANSACTIONS on Communications
SP - 2975
EP - 2981
AU - Jin-Seob MOON
AU - Joo-Seong JEON
PY - 2003
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E86-B
IS - 10
JA - IEICE TRANSACTIONS on Communications
Y1 - October 2003
AB - Direct conversion techniques commonly used for the transmitter in basestation rely on analog performance of the quadrature modulator. In this paper, simulated results show that imperfections in analog quadrature modulation--gain and phase error and dc offset--have a devastating effect on digital predistortion for power amplifier linearization circuits. We construct compensation circuit to remove these errors, and conduct an experiment. The imbalance errors are compensated by using the output spectrum of modulator. The image spurious (-56.74 dBm) with gain, phase and the dc offset spurious (-43.83 dBm) are reduced to -93.21 dBm and -93.56 dBm, respectively. These experimental results illustrate that modulation errors can be eliminated.
ER -