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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/16515
Title: Investigating effects of quadrature imperfection of vector multiplier in implementing RF/digital predistortion
Authors: Rawat, Karun
Hammi O.
Ghannouchi F.M.
Published in: Proceedings of 2009 IEEE 10th Annual Wireless and Microwave Technology Conference, WAMICON 2009
Abstract: RF linear vector multiplier is a key component in hybrid RF/Digital predistortion systems. It adjusts, through I and Q baseband control signals, the input signal's magnitude and phase according to the gain and phase required by the predistortion synthesis. In practical situations, due to hardware impairments, the I and Q correction signals combine in some non quadrature phase relation to give error in terms of implemented gain and phase of the predistortion functions. This quadrature imperfection can lead to poor correction in terms of predistortion and hence reduces the linearization capability of the predistortion system. This paper analyzes the effects of such quadrature imperfection in RF/Digital predistortion schemes. Experimental validation is carried out on a power amplifier biased in class B mode and driven by 3G WCDMA signal. ©2009 Crown.
Citation: Proceedings of 2009 IEEE 10th Annual Wireless and Microwave Technology Conference, WAMICON 2009, (2009. Clearwater, FL
URI: https://doi.org/10.1109/WAMICON.2009.5207270
http://repository.iitr.ac.in/handle/123456789/16515
Issue Date: 2009
Keywords: 3G-WCDMA
Base bands
Class B
Control signal
Experimental validations
Input signal
Investigating effects
Key component
Linear vectors
Pre-distortion
Quadrature phase
Vector multipliers
Frequency multiplying circuits
Microwave devices
Microwaves
Power amplifiers
Error correction
ISBN: 9.78E+12
Author Scopus IDs: 57000644800
8297024300
7006217592
Author Affiliations: Rawat, K., I-Radio Laboratory, Department of Electrical Engineering, University of Calgary, Calgary, AB T2N1N4, Canada
Hammi, O., I-Radio Laboratory, Department of Electrical Engineering, University of Calgary, Calgary, AB T2N1N4, Canada
Ghannouchi, F.M., I-Radio Laboratory, Department of Electrical Engineering, University of Calgary, Calgary, AB T2N1N4, Canada
Corresponding Author: Rawat, K.; I-Radio Laboratory, Department of Electrical Engineering, University of Calgary, Calgary, AB T2N1N4, Canada; email: krawat@ucalgary.ca
Appears in Collections:Conference Publications [ECE]

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