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Improved IP2 calibration method using a perturbance-based algorithm

Published online by Cambridge University Press:  19 March 2009

Karim Aoulad Ali ,
Philippe Barré ,
Guillaume Andrieux  and
Jean-François Diouris
Karim Aoulad Ali*
Affiliation:
ST-NXP Wireless, 2 esplanade Anton Philips, Campus Effiscience, Colombelles, BP 20000, 14906 Caen Cedex 9, France. Phone: +33(0)2.31.45.6000; Fax: 3970, Emails: karim.aoulad.ali@stnwireless.com, philippe.barre@stnwireless.com Research Institute in Electrotechniques and Electronics of Nantes Atlantique (IREENA), University of Nantes, Rue Christian Pauc, La Chantrerie, BP 50609, 44306 Nantes Cedex 3, France. Phone: +33(0)2.40.68.3074; Fax: 3233, Emails: karim.aoulad.ali@etu.univ-nantes.fr, guillaume.andrieux@univ-nantes.fr, jean-francois.diouris@univ-nantes.fr.
Philippe Barré
Affiliation:
ST-NXP Wireless, 2 esplanade Anton Philips, Campus Effiscience, Colombelles, BP 20000, 14906 Caen Cedex 9, France. Phone: +33(0)2.31.45.6000; Fax: 3970, Emails: karim.aoulad.ali@stnwireless.com, philippe.barre@stnwireless.com
Guillaume Andrieux
Affiliation:
Research Institute in Electrotechniques and Electronics of Nantes Atlantique (IREENA), University of Nantes, Rue Christian Pauc, La Chantrerie, BP 50609, 44306 Nantes Cedex 3, France. Phone: +33(0)2.40.68.3074; Fax: 3233, Emails: karim.aoulad.ali@etu.univ-nantes.fr, guillaume.andrieux@univ-nantes.fr, jean-francois.diouris@univ-nantes.fr.
Jean-François Diouris
Affiliation:
Research Institute in Electrotechniques and Electronics of Nantes Atlantique (IREENA), University of Nantes, Rue Christian Pauc, La Chantrerie, BP 50609, 44306 Nantes Cedex 3, France. Phone: +33(0)2.40.68.3074; Fax: 3233, Emails: karim.aoulad.ali@etu.univ-nantes.fr, guillaume.andrieux@univ-nantes.fr, jean-francois.diouris@univ-nantes.fr.
*
Corresponding author: K.A. Ali Email: karim.aoulad.ali@etu.univ-nantes.fr
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Abstract

To achieve a high IIP2 level on a mixer, static calibration techniques have been developed. Most of them are based on an intentional introduction of a calibrated mismatch in the structure of the mixer. They are performed at production stage. It is also possible to automate them but their activation is strongly limited in portable devices because of system restrictions. Furthermore, IIP2 is sensitive to system variations, thereby degrading the calibration operation. The challenge is so to make the calibration system dynamic, i.e. performing an online calibration. This paper presents a perturbance-based algorithm as part of an automatic calibration system to track the optimum IIP2 level. Measurements validate the algorithm behavior and indicate the feasibility of using it in a complete calibration system for a future on-chip implementation.

Keywords

CalibrationDirect conversion receiversDownconversion mixerIIP2Perturbance-based algorithmSecond-order distortion

Information

Type
Original Article
Information
International Journal of Microwave and Wireless Technologies , Volume 1 , Issue 1 , February 2009 , pp. 83 - 87
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2009

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References

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