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- S. Farsi, J. Dooley, K. Finnerty, D. Schreurs, B. Nauwelaers, R. Farrell
- 2012 7th European Microwave Integrated Circuit…
- 2012

A new behavioral model is proposed which can provide similar accuracy to the memory polynomial model (MPM) but is shown to have a more efficient architecture for digital hardware implementation. These features have been achieved by the proposed formulation, in which the nonlinear weights of the memory terms are a function of only the present input sample.… (More)

A novel low-rate identication method for high power ampliers with memory-effect is presented. It is demonstrated that the required bandwidth of the feedback signal is not required to be greater than twice the signal modulation bandwidth, but is instead determined by the number of feedback samples and the degree of freedom of coefcients in the behavioral… (More)

- S. Farsi, J. Dooley, K. Finnerty, D. Schreurs, B. Nauwelaers, R. Farrell
- 2013 IEEE Topical Conference on Power Amplifiers…
- 2013

Memory polynomial behavioral models are widely used to model nonlinear distortion mechanisms in a single RF power amplifier. However, when a number of power amplifiers are used in parallel, as in the case of active antenna arrays, the total number of parameters will increase significantly. Hence, new strategies are required to model and linearize these… (More)

- Keith Finnerty, John Dooley, Robin Wesson, Mark P. van der Heijden, Mustafa Acar, Ronan Farrell
- IEEE Transactions on Microwave Theory and…
- 2016

This paper presents a comparison of existing and novel behavioral models targeted at the outphasing power amplifier (PA) architecture. A comprehensive comparison of ten modeling strategies is presented in the results. Novel techniques for outphasing PAs, such as vector switched and dual path time series, are also presented for the first time. Investigation… (More)

- Pooria Varahram, John Dooley, Keith Finnerty, Ronan Farrell
- Int. J. Communication Systems
- 2017

The methods used to model nonlinear power amplifiers are many and varied. With the introduction of active antenna arrays as a solution to increasing the capacity of cellular networks new strategies need to be developed to model their multiple signal paths. Models for power amplifiers in active antenna arrays will be required to have similar performance in… (More)

- Ziming Wang, John Dooley, Keith Finnerty, Ronan Farrell
- 2015 10th European Microwave Integrated Circuits…
- 2015

In this paper, we present an algorithm which uses the probability information of the input signal to inform the selection of a compressed training dataset for RF PA behavioural model extraction. The proposed algorithm can dramatically reduce the number of training samples. The accuracy of this algorithm is validated by extraction of behavioural models using… (More)

- Keith Finnerty, John Dooley, Ronan Farrell
- 2011 20th European Conference on Circuit Theory…
- 2011

In this paper a phase compensation technique for the digital up conversion of a quadrature signal for amplification with switch mode power amplifiers is proposed. When a digital signal generator is used to generate the complex envelope signal care must be taken to compensate for the phase skew between the two paths. If phase compensation is not implemented… (More)

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