SIMULINK Framework for the Modeling of Cartesian Feedback Power Amplifier Linearization Systems

Abstract : The Power Amplifier (PA) are the last element in the Radio Frequency (RF) transmitter path. It’s main goal is to drive the antenna to deliver the output power required by the standard used. To do so PAs consumed a great amount of energy of modern electronic devices. It faces a trade-off between spectral efficiency and power saving. Nonetheless, different linearization methods can provide both linearization and power consumption optimization. This work starts with the validation of a digital CFB linearization system using a Proportional and Integrative (PI) controller, which is able to decrease spectral side lobes of at least 20dB. Next, non-linearities are added to the elements in the transmission chain in the forward and feedback paths, and the same regulator is used to linearize the system. Finally, the imperfections on the feedback are removed. The results start by validating the digital CFB linearization system, so that different configurations of non-linearities can be simulated and compared. The system operates with 4QAM and 16QAM modulation, raisedcosine filter, PA modeled using Salehs equation and a PI regulator.
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Conference papers
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https://hal.archives-ouvertes.fr/hal-01430047
Contributor : Nathalie Deltimple <>
Submitted on : Monday, January 9, 2017 - 2:36:51 PM
Last modification on : Wednesday, September 11, 2019 - 5:46:12 PM

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  • HAL Id : hal-01430047, version 1

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Camilo Coelho, Dominique Dallet, Nathalie Deltimple, Eric Kerherve. SIMULINK Framework for the Modeling of Cartesian Feedback Power Amplifier Linearization Systems. 2016 1st International Symposium on Instrumentation Systems, Circuits and Transducers (INSCIT), Aug 2016, Belo Horizonte, Brazil. ⟨hal-01430047⟩

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