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Simplified dynamic deviation reduction-based Volterra model for Doherty power amplifiers

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2 Author(s)
Lei Guan ; Sch. of Electr., Electron. & Commun. Eng., Univ. Coll. Dublin, Dublin, Ireland ; Anding Zhu

A simplified 2nd-order dynamic deviation reduction-based Volterra series model is proposed for characterizing wideband multi-carrier Doherty power amplifiers. By removing several redundant terms, this model has much less complexity but maintains excellent modeling performance, compared to the full-size model. Experimental results show that both nonlinear distortion and memory effects in the Doherty PA can be almost completely removed by employing digital predistortion with proposed model, when excited by 2- and 4-carrier WCDMA signals.

Published in:

Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC), 2011 Workshop on

Date of Conference:

18-19 April 2011