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Flexible test bed for the behavioural modelling of power amplifiers

José Cruz Nuñez-Perez (Digital Technology Research and Development Center, National Polytechnic Institute (CITEDI-IPN), Tijuana, Mexico)
José Ricardo Cardenas-Valdez (Digital Technology Research and Development Center, National Polytechnic Institute (CITEDI-IPN), Tijuana, Mexico)
Christian Gontrand (Institut des Nanotechnologies de Lyon, CNRS UMR5270, Universitie de Lyon, INSA-Lyon, France)
J. Apolinar Reynoso-Hernandez (Electronics and Telecommunications, Center for Scientific Research and Higher Education of Ensenada (CICESE), Ensenada, Mexico)
Francisco Iwao Hirata-Flores (Digital Technology Research and Development Center, National Polytechnic Institute (CITEDI-IPN), Tijuana, Mexico)
Rigoberto Jauregui-Duran (Electronics and Telecommunications, Center for Scientific Research and Higher Education of Ensenada (CICESE), Ensenada, Mexico)
Francisco J. Perez-Pinal (Department of Electrical and Computer Engineering, McMaster University, Hamilton, Canada)
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Abstract

Purpose

The paper aims to focus on the memory-polynomial model (MPM) as special case of Volterra series, implemented in hardware. The behavior of the MPM is fully proved through a comparison with AM-AM and AM-PM measured data. The results show that this simulation technique is able to prove the effectiveness of the MPM implementation as behavioural model for high power radiofrequency amplifiers. The system is able to compensate perturbations caused by modern communication systems.

Design/methodology/approach

The implementation uses Matlab-Simulink, and its digital signal processing (DSP) builder. The first stage allows developing the model in Matlab using the DSP builder blockset through the signal compiler block. Then, the design is downloaded to the DSP board.

Findings

The paper demonstrates a proper behavior of the MPM as a truncation of the Volterra series, with respect to different inputs. This is a key point, because the series truncations allow first to implement this model in real time and second to obtain a correct precision, for instance when modeling amplification of digital signals in high frequency.

Originality/value

The global system approach permits to easily develop, simulate, and validate a wireless system. The efficiency of a complete connected solution based on Agilent Technologies tools, combining simulations and measurements under true operating conditions, seems to be clearly demonstrated.

Keywords

Acknowledgements

The authors wish to thank SEP-CONACyT for its support provided through the project “136056 Basic Science”. In addition, the authors would like to express their gratitude to the IPN for its financial support by the project “SIP-SNI-2011/22”.

Citation

Cruz Nuñez-Perez, J., Ricardo Cardenas-Valdez, J., Gontrand, C., Apolinar Reynoso-Hernandez, J., Iwao Hirata-Flores, F., Jauregui-Duran, R. and J. Perez-Pinal, F. (2014), "Flexible test bed for the behavioural modelling of power amplifiers", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 33 No. 1/2, pp. 355-375. https://doi.org/10.1108/COMPEL-11-2012-0326

Publisher

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Emerald Group Publishing Limited

Copyright © 2014, Emerald Group Publishing Limited